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Journal articles on the topic '2-Amino substituted benzothiazole'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Srivastav, Manish, MD Salahuddin, and S. M. Shantakumar. "Synthesis and Anti-inflammatory Activity of Some Novel 3-(6-Substituted-1, 3-benzothiazole-2-yl)-2-[{(4-substituted phenyl) amino} methyl] quinazolines-4 (3H)-ones." E-Journal of Chemistry 6, no. 4 (2009): 1055–62. http://dx.doi.org/10.1155/2009/507052.

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A series of novel 3-(6-substituted-1, 3-benzothiazole-2-yl)-2-[{(4-substituted phenyl) amino} methyl] quinazolines-4(3H)-ones were synthesized by treating 2-(chloromethyl)-3-(6-substituted-1, 3-benzothiazole-2-yl) quinazoline-4-(3H)-one (IIa-d) with various substituted amine. The compounds (IIa-d) prepared by treating 2-[(chloroacetyl) amino] benzoic acid with different 2-amino-6-substituted benzothiazole. Elemental analysis, IR,1HNMR and mass spectral data confirmed the structure of the newly synthesized compounds. Synthesized quinazolines-4-one derivative were investigated for their anti-inf

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2

Gangadhar, S. Bhopalkar. "Synthesis and Characterization of 3-Cyano-6,9-dimethyl-4-oxo-2-methylthio- 4H-Pyrimido[2,1-b][1,3] Benzothiazole and its 2-Substituted derivatives." Chemistry Research Journal 6, no. 4 (2021): 132–35. https://doi.org/10.5281/zenodo.11758088.

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<strong>Abstract </strong>A compound 3-cyano-6, 9-dimethyl- 4-oxo 2-methylthio-4H-Pyrimido[2,1-<em>b</em>][1,3] benzothiazole 3 has been prepared by the reaction of<strong> </strong>2-amino- 4,7- dimethyl [1, 3] benzothiazole 1<strong> </strong>with Ethyl -2-cyano-3,3’-bis-methylthio acrylate 2<strong> </strong>in presence of anhydrous K<sub>2</sub>CO<sub>3</sub> in DMF. The compound pyrimido benzothiazole 3 has methylthio functional group at 2- position which was substituted by using selected nucleophiles like substituted phenols, anilines, heteryl amine and active methylene compounds t

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3

Mistry, K. M., and K. R. Desai. "Synthesis of Novel Heterocyclic 4-Thiazolidinone Derivatives and their Antibacterial Activity." E-Journal of Chemistry 1, no. 4 (2004): 189–93. http://dx.doi.org/10.1155/2004/590439.

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4-Thiazolidinones have been prepared by the reaction of various substituted Schiff bases 3 with Thioglycolic acid and Thiolactic acid. The intermediate Schiff bases 3 were synthesized by the condensation of various substituted 2-amino benzothiazole 1 with 1-(4'-methyl Phenyl)-3-methyl-5-pyrazolone 2. The starting compound substituted 2-amino benzothiazoles were prepared from various substituted amines via substituted phenyl thiourea. The structures of the compounds have been confirmed by elemental analysis and spectral analysis. The antibacterial activity of the compounds has also been screene

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4

Schroeder, Zachary W., L. K. Hiscock, and Louise Nicole Dawe. "Copper(II)- and gold(III)-mediated cyclization of a thiourea to a substituted 2-aminobenzothiazole." Acta Crystallographica Section C Structural Chemistry 73, no. 11 (2017): 905–10. http://dx.doi.org/10.1107/s205322961701381x.

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Benzothiazole derivatives are a class of privileged molecules due to their biological activity and pharmaceutical applications. One route to these molecules is via intramolecular cyclization of thioureas to form substituted 2-aminobenzothiazoles, but this often requires harsh conditions or employs expensive metal catalysts. Herein, the copper(II)- and gold(III)-mediated cyclizations of thioureas to substituted 2-aminobenzothiazoles are reported. The single-crystal X-ray structures of the thiourea N-(3-methoxyphenyl)-N′-(pyridin-2-yl)thiourea, C13H13N3OS, and the intermediate metal complexes aq

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5

Purvesh, J. Shah. "Preparation, Characterization and Biological Screening of Novel Imidazoles." Journal of Progressive Research in Chemistry 2, no. 1 (2015): 54–60. https://doi.org/10.5281/zenodo.3970044.

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The 4-benzylidene-2-(4-methoxyphenyl)oxazol-5(4H)-one (B) has been prepared from cyclo condensation reaction between hippuric acid (A) with p-anisaldehyde. A series of 4-benzylidene-1-(substitued-2- benzothiazolyl)-2-(4-methoxyphenyl)-1H-imidazol-5(4H)-one (D1-6) have been synthesized from 2-amino substituted benzothiazole (C1-6) by condensation reaction with 4-benzylidene-2-(4-methoxyphenyl) oxazol-5(4H)-one (B). The synthesized compounds were characterized by IR, 1H-NMR, 13C-NMR and Mass spectral data. All the compounds were screened for their antibacterial and antifungal activities.

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6

N., B. Patel, and N. Agravat S. "Synthesis, characterization and biological screening of some new pyridine derivatives." Journal of Indian Chemical Society Vol. 84, Aug 2007 (2007): 785–91. https://doi.org/10.5281/zenodo.5824938.

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Department of Chemistry, Veer Narmad South Gujarat University, Surat-395 007, Gujarat, India <em>E-mail</em>: drnavin @satyam.net.in; snagravat@yahoo.co.in <em>Manuscript received 18 August 2006, revised 26 March 2007, accepted 13 June 2007</em> 2-Amino substituted benzothiazole 2<sub>1_12</sub> and<em> p</em>-acetamidobenzenesulfonyl chloride 1 were used to prepare <em>N"</em>-(<em>p</em>anilinosulfonamido) substitutedbenzothiazole 4<sub>1_12</sub> using mixture of pyridine and acetic anhydride which formed (<em>N</em>-acetyl pyridinium) an cleetrophilic complex which facilitated condens

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7

Sathe, B. S., E. Jaychandran, G. M. Sreenivasa, and V. A. Jagtap. "Antimycobacterial Activity of Some Synthesized Fluorinated Benzothiazolo Imidazole Compounds." E-Journal of Chemistry 8, no. 2 (2011): 830–34. http://dx.doi.org/10.1155/2011/581429.

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4-Fluoro-3-chloroanilline treated with potassium thiocyanate in presence of glacial acetic acid and bromine was converted into 2-amino-6-fluoro-7-chlorobenzothiazole, resulting into 2-amino benzothiazole. The synthesized compound in presence of 2-phenyl-4-benzylidine-5-oxazolinone refluxed in pyridine to obtain 2-(2-phenyl-4-benzylidenyl-5-oxo-imidazolin-1-yl amino)-6-fluoro-7-substituted(1,3)benzothiazoles. The above said compound was treated withortho, metaandpara nitroanillines, ortho, meta, parachloroanillines, morpholino, piperazine, diphenylamine in the presence of DMF to obtain differen

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8

Journal, Baghdad Science. "Synthesis , characterization and biological activity study of N-substituted sulfonamido maleimides substituted with different heterocycles." Baghdad Science Journal 7, no. 1 (2010): 641–53. http://dx.doi.org/10.21123/bsj.7.1.641-653.

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Eighteen new cyclic imides (maleimides) conncted to benzothiazole moiety through sulfonamide group were synthesized via multistep synthesis.The first step involved preparation of two maleamic acids N-phenylmaleamic acid and N-benzylmaleamic acid via reaction of maleic anhydride with aniline or benzyl amine.Dehydration of the prepared amic acids by treatment with acetic anhydride and anhydrous sodium acetate in the second step afforded N-phenylmaleimide and N- benzyl maleimide which in turn were treated with chlorosulfonic acid in the third step to afford 4-(N-maleimidyl) phenyl sulfonyl chlori

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9

Niharika, P., J. Risy Namratha, N. Sunitha, and S. Manohar Babu. "Synthesis and evaluation of 6-Fluoro benzothiazole substituted quinazolinones." Current Trends in Pharmacy and Pharmaceutical Chemistry 4, no. 1 (2022): 35–40. http://dx.doi.org/10.18231/j.ctppc.2022.007.

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The present work was hypothesized to synthesize Benzothiazole substituted diethyl amino Quinazolinone derivatives and evaluate their antimicrobial activity. Quinazolinones were synthesized from condensation of 2-amino benzothiazole, anthranilic acid and acetic anhydride further followed by condensation with formaldehyde and diethyl amine. Antimicrobial activity was evaluated by agar disc diffusion using organisms and anti-inflammatory and antioxidant activies were studied using albumin denaturation and hydrogen peroxide radical scavenging methods. The structures of the synthesized Quinazolinon

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10

Gangadhar, S. Bhopalkar. "Synthesis and in-vitro Anticancer Activity of 3 -Cyano- 9, 12-Dimethyl -4, 14-Diimino- 2-Methylthio- Pyrimido[2,3-b] Pyrazolo[3,4-e] Pyrimido[2,3-b][1,3] Benzothiazole and its 2-Substituted Derivatives." Chemistry Research Journal 8, no. 4 (2023): 13–19. https://doi.org/10.5281/zenodo.11352251.

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<strong>Abstract </strong> A new heterocyclic compound 3 -Cyano- 9, 12-dimethyl -4, 14-diimino- 2-methylthio- pyrimido[2,3<em>-b</em>] pyrazolo[3,4<em>-e</em>] pyrimido[2,3<em>-b</em>][1,3] benzothiazole 3 has been synthesised by the reaction of 3-amino- 4-imino- 6, 9-dimethyl- pyrazolo-[3, 4<em>-e</em>] pyrimido [2, 3<em>-b</em>] [1, 3] benzothiazole 2  with bis - methylthio methylene malononitrile  in presence of anhydrous K<sub>2</sub>CO<sub>3</sub> in DMF. Compound 3 has thiomethyl functionality at 2- position which was substituted by using selected nucleophiles like substituted

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11

Journal, Baghdad Science. "Synthesis and Evaluation of Antimicrobial activity of several new Maleimides to Benzothiazole moiety." Baghdad Science Journal 10, no. 3 (2013): 658–72. http://dx.doi.org/10.21123/bsj.10.3.658-672.

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In this work, a series of new maleimides linked to substituted benzothiazole moiety were synthesized. Synthesis of these new cyclic imides were performed via three steps, the first one involved preparation of a series of 2-aminobenzothiazole substituted with different substituents via reaction of different primary aromatic amines with ammonium thiocyanate and bromine in glacial acetic acid. The prepared 2- amino benzothiozoles were introduced in the second step in reaction with maleic anhydride producing a series of N-(substituted benzothiazole-2-yl) maleamic acids.The resulted maleamic acids

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12

Azzawi, Ahlam Marouf AL, and Suroor Abdul Rhahman Mahdi. "Synthesis and Evaluation of Antimicrobial activity of several new Maleimides to Benzothiazole moiety." Baghdad Science Journal 10, no. 3 (2013): 658–72. http://dx.doi.org/10.21123/bsj.2013.10.3.658-672.

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In this work, a series of new maleimides linked to substituted benzothiazole moiety were synthesized. Synthesis of these new cyclic imides were performed via three steps, the first one involved preparation of a series of 2-aminobenzothiazole substituted with different substituents via reaction of different primary aromatic amines with ammonium thiocyanate and bromine in glacial acetic acid. The prepared 2- amino benzothiozoles were introduced in the second step in reaction with maleic anhydride producing a series of N-(substituted benzothiazole-2-yl) maleamic acids.The resulted maleamic acids

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13

Sai Priya, D., S. G. Kini, V. G. Bhatt, E. Rathi, A. Muralidharan, and A. Koteshwara. "NOVEL SCHIFF'S BASES OF SUBSTITUTED 2-AMINO BENZOTHIAZOLES: DESIGN, SYNTHESIS AND ANTIMICROBIAL ACTIVITY." INDIAN DRUGS 55, no. 04 (2018): 18–26. http://dx.doi.org/10.53879/id.55.04.11219.

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Novel Schiff’s bases bearing substituted 2-amino benzothiazole were synthesized by single step process through simple condensation of 2-amino benzothiazole and substituted benzaldehydes and further characterized by FTIR, 1HNMR, and Mass spectrometry data. Antimicrobial activity of compounds was performed by agar diffusion method against a panel of bacterial strains such as S. aureus, B. subtilis (Gram-positive bacteria), E. coli, P. aeruginosa (Gram-negative bacteria) and fungal strains such as C. albicans and A. niger. Compound S13 and S17 had shown potent antifungal activity against C. albic

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14

Gadhave, R. V., and B. S. Kuchekar. "DESIGN, SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL EVALUATION OF NOVEL BENZOTHIAZOLE BASED [1, 2, 4]-TRIAZOLO [4, 3-A] QUINOXALINE DERIVATIVES." INDIAN DRUGS 56, no. 09 (2019): 22–29. http://dx.doi.org/10.53879/id.56.09.11901.

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Quinoxaline, triazole and benzothiazole heterocycles plays an important role in modulating biological activity. The present work describes the biological evaluation of target molecules designed using autodock vina docker. Novel benzothiazole based [1, 2, 4]-triazolo [4, 3-a] quinoxalines were synthesized by condensation of substituted 2-amino benzothiazoles and 4-chloro triazoloquinoxalines. The synthesized compounds were characterized by analysis of physical and spectral data. All synthesized compounds were screened for antioxidant activity using 1, 1-Diphenyl-2-picrylhyrazyl radical scavengi

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15

Gangadhar, S. Bhopalkar. "Synthesis and Characterization of 3-Cyano- 9,12-Dimethyl -4,14-Dioxo-2-Methylthio- Pyrimido[2,3-b]Pyrazolo[3,4-e]Pyrimido[2,3-b][1,3]Benzothiazole and its 2-Substituted Derivatives." Pharmaceutical and Chemical Journal 9, no. 4 (2022): 52–55. https://doi.org/10.5281/zenodo.13973144.

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A novel fused heterocyclic compound 3-cyano- 9, 12-dimethyl -4, 14-dioxo- 2-methylthio- Pyrimido[2,3<em>-b</em>] Pyrazolo[3,4<em>-e</em>] Pyrimido[2,3<em>-b</em>][1,3] Benzothiazole (3) was prepared by the reaction of 3-amino - 6, 9-dimethyl- 4-oxo pyrazolo[3,4-<em>e</em>]-pyrimido[2,1-<em>b</em>][1,3] benzothiazole (1) with Ethyl-2-cyano-3,3’-bis-methylthio acrylate (2)<strong> </strong>in presence of anhydrous K<sub>2</sub>CO<sub>3</sub> in DMF.<strong> </strong>Moreover the compound (3) has thiomethyl functionality at 2- position act as best leaving group, which was get substituted di

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16

Pal, Narendra, Mahesh Kumar, and Gita Seth. "Biological Important Ni(II) Ternary Complexes Derived from 2-Substituted Benzothiazoles and Amino Acids." E-Journal of Chemistry 8, no. 3 (2011): 1174–79. http://dx.doi.org/10.1155/2011/612847.

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Biological important ternary complexes of the type [NiCl(L-L) (A-A)(H2O)] and [Ni(L-L´)(A-A)(H2O)2], where A-A = Glycine (Gly), Alanine (Ala), L-L = 2-(2´-aminophenyl)benzothiazole (APBT) and L-L´ = 2-(2´-hydroxyphenyl)benzothiazole (HPBT), 2-(2´-mercaptophenyl)benzothiazole (MPBT) have been synthesized. These complexes have been characterized by elemental analysis, molecular weight determination, conductivity, magnetic measurements, infrared, electronic spectral and TGA studies. On the basis of above described studies an octahedral geometry has been suggested for these complexes. All these co

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17

Toshniwal, Madhu, Mahendra Bundel, Ravikant, and Arun Pareek. "Antifungal Activity of Synthesized Benzothiazole Derivatives using Structure Activity Relationship." Asian Journal of Chemistry 31, no. 8 (2019): 1885–88. http://dx.doi.org/10.14233/ajchem.2019.21858.

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In the field of drug discovery the benzothiazole is found to be a magical compound. Computational tools were used to predict their molecular property, drug likeness, overall drug score and toxicity risks which are essential parameter for a chemical to be qualified as a drug. As good results were observed by computational tools then novel series of 2-amino-6-substituted benzothiazoles with halo ketone have been synthesized by conventional method. All the synthesized compounds have been characterized by elemental analysis and IR, 1H NMR data in full accordance with their expected (depicted) stru

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18

Journal, Baghdad Science. "Synthesis, Characterization and study biologicalactivity of several 1-cyclopentene-1,2-dicarboxylimidyl Containing oxadiazole and Benzothiazole." Baghdad Science Journal 11, no. 2 (2014): 429–37. http://dx.doi.org/10.21123/bsj.11.2.429-437.

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In this work involved prepared of several new 1-cyclopentene-1,2-dicarboxylimide linked to oxadiazole and benzothiazole moiety were synthesized by two steps: The first step 2-amino-substituted-1,3,4-oxadiazoles and substituted-2-aminobenzothiazole were reaction with 1-cyclopentene-1,2-dicarboxyl anhydride producing N-( 5- substituted-1,3,4-oxadiazole-2-yl)-1-cyclopentene-1,2-dicarboxyl amic acids and N-(Substitutedbenzothiazole-2-yl)-1-cyclopentene-1,2-dicarboxyl amic acids which in turn were dehydrated in the second step via fusion method to afford he desirable N-(5-substituted-1,3,4-oxadiazo

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19

Alzubaidy, Shetha N., Mustafa A. Yasin, Omar A. Lateef, and Hind F. Thamer. "Synthesis, Characterization and study biologicalactivity of several 1-cyclopentene-1,2-dicarboxylimidyl Containing oxadiazole and Benzothiazole." Baghdad Science Journal 11, no. 2 (2014): 429–37. http://dx.doi.org/10.21123/bsj.2014.11.2.429-437.

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In this work involved prepared of several new 1-cyclopentene-1,2-dicarboxylimide linked to oxadiazole and benzothiazole moiety were synthesized by two steps: The first step 2-amino-substituted-1,3,4-oxadiazoles and substituted-2-aminobenzothiazole were reaction with 1-cyclopentene-1,2-dicarboxyl anhydride producing N-( 5- substituted-1,3,4-oxadiazole-2-yl)-1-cyclopentene-1,2-dicarboxyl amic acids and N-(Substitutedbenzothiazole-2-yl)-1-cyclopentene-1,2-dicarboxyl amic acids which in turn were dehydrated in the second step via fusion method to afford he desirable N-(5-substituted-1,3,4-oxadiazo

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20

Zhilitskaya, Larisa V., Bagrat A. Shainyan, and Nina O. Yarosh. "Modern Approaches to the Synthesis and Transformations of Practically Valuable Benzothiazole Derivatives." Molecules 26, no. 8 (2021): 2190. http://dx.doi.org/10.3390/molecules26082190.

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The review is devoted to modern trends in the chemistry of 2-amino and 2-mercapto substituted benzothiazoles covering the literature since 2015. The reviewed heterocycles belong to biologically active and industrially demanded compounds. Newly developed synthesis methods can be divided into conventional multistep processes and one-pot, atom economy procedures, realized using green chemistry principles and simple reagents. The easy functionalization of the 2-NH2 and 2-SH groups and the benzene ring of the benzothiazole moiety allows considering them as highly reactive building blocks for organi

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21

R., N. DASH, and V. RAMANA RAO D. "Complexes of Benzothiazole and 2-Substituted Benzothia-zoles with Silver (I)-Co-ordination Number 2 and 3." Journal of Indian Chemical Society Vol. 51, Sep 1974 (2022): 787–89. https://doi.org/10.5281/zenodo.6413396.

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Department of Chemistry, Regional Engineering College, Rourkela-8. <em>Manuscript received 5 August 1973 ; accepted 4 July 1974.</em> Twelve silver (I) complexes having the general formula [AgL<sub>2</sub>]X and [AgL<sub>2</sub>X] where L is benzothiazole (bt), 2-methyl benzothiazole (mbt) and 2-amino benzothiazole (ambt) have been prepared and characterised. Molar conductance and infra-red spectra (5000-650 cm<sup>-1</sup>) show that nitrate and perchlorate groups are ionic giving rise to more usual two-coordinated compounds. The thiocyanate and cyanate groups, however, are coordinated to the

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22

Cindrić, Maja, Irena Sović, Marija Mioč, et al. "Experimental and Computational Study of the Antioxidative Potential of Novel Nitro and Amino Substituted Benzimidazole/Benzothiazole-2-Carboxamides with Antiproliferative Activity." Antioxidants 8, no. 10 (2019): 477. http://dx.doi.org/10.3390/antiox8100477.

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We present the synthesis of a range of benzimidazole/benzothiazole-2-carboxamides with a variable number of methoxy and hydroxy groups, substituted with nitro, amino, or amino protonated moieties, which were evaluated for their antiproliferative activity in vitro and the antioxidant capacity. Antiproliferative features were tested on three human cancer cells, while the antioxidative activity was measured using 1,1-diphenyl-picrylhydrazyl (DPPH) free radical scavenging and ferric reducing antioxidant power (FRAP) assays. Trimethoxy substituted benzimidazole-2-carboxamide 8 showed the most promi

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23

Gineinah, Magdy. "6-, 7- AND 8-(5-ARY L-1-PHENYL-2-PYRAZOLIN-3-LY)IMIDAZO- AND PYRIMIDO[2,1-b]BENZOTHIAZOLES AS NOVEL ANTICONVULSANT AGENTS." Scientia Pharmaceutica 69, no. 1 (2001): 53–61. http://dx.doi.org/10.3797/scipharm.aut-01-06.

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Some new derivatives of 2-amino-5- and 6-(5-aryl-1-phenyl-2-pyrazolin-3-yl)benzothiazole were synthesized from the corresponding aminophenyl compounds by reaction with KSCN/Br2 to build up the benzothiazole ring. The aminophenyl derivatives of pyrazoline were prepared by cyclization with phenylhydrazine of the appropriate 1,3-diphenyl-2-propen-1-one derivatives obtained from arninoacetophenone and differently substituted aldehydes. However, the newly synthesized 2-aminobenzothiazole derivatives of pyrazoline were subjected to cyclization with ethyl brornopyruvate to afford the formation of 6-

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Tsemeugne, Joseph, Yetiny Atuh Bah, Ulrich Joel Tsopmene, et al. "Synthesis, Antibacterial and Antibiofilm Activity of New 1,2,3,5-Tetrazine Derivatives from Coupling Reactions of Diazonium Salt of 2-Amino-6-nitrobenzothiazole With Diverse Substituted 2-Aminobenzothiazole Derivatives." Acta Chimica Slovenica 71, no. 2 (2024): 353–62. http://dx.doi.org/10.17344/acsi.2023.8550.

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The coupling reaction of diazonium ion of 2-amino-6-nitrobenzothiazole at 0–5 °C with distinctly substituted 2-aminobenzothiazole derivatives produced new 1,2,3,5-tetrazine derivatives. It was found that diazotized 2-amino-6-nitrobenzo[d]thiazol reacts with the ring nitrogen atom of variously substituted 2-aminobenzothiazole derivatives to yield tetrazine nucleus. The benzene ring of benzothiazole bearing electron donor group and annulated to the tetrazine was further substituted in situ by other (6-nitrobenzo[d]thiazol-2-yl)diazinyl to yield the final product. The structure of the prepared co

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25

Mahdi, Monther. "Synthesis, Characterization and Antimicrobial Activity of Some Novel 1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile Derivatives." JOURNAL OF ADVANCES IN CHEMISTRY 11, no. 6 (2015): 3635–41. http://dx.doi.org/10.24297/jac.v11i6.851.

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The present research work deals with synthesize a series of various substituted benzothiazole containing 6-amino- 4-(substituted aryl)- tetrahydropyrano[2,3-c]pyrazole-5-carbonitrilic by reacting 2-mercaptobenzothiazole with hydrazine hydrate to synthesize hydrazine derivatives of benzothiazole (1), which then reacted with β- keto ester to develop pyrazole derivative (2), and then finally reacted with malononitrile and different aromatic aldehydes to obtain the final compounds (3a-3f). The structures of the intermediates and final compounds are assigned by using FTIR and 1H-NMR. The final comp

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Shetty, Chaithra R., Ishwar K. Bhat, Abhishek Kumar, Vijay Kumar Merugumolu, Revanasidappa BC, and Banylla Felicity Dkhar Gatphoh. "CONVENTIONAL AND MICROWAVE SYNTHESIS AND ANTIOXIDANT EVALUATION OF BENZOTHIAZOLE SUBSTITUTED 4-THIAZOLIDINONES." INDIAN DRUGS 57, no. 10 (2021): 17–22. http://dx.doi.org/10.53879/id.57.10.12175.

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Antioxidants exert their action chiefly in controlling and preventing the free-radicals and their reactions and thus it has a vital role as health protecting factor. There are many scientific data proposing that antioxidants lower the threats of some chronic diseases including cancer and heart disease. In the present work, the hybrid molecule i.e benzothiazole substituted 4-thiazolidinone, has been taken for the study and different novel benzothiazole substituted 4-thiazolidinone derivatives were synthesized by reacting 2-amino-6-methyl benzothiazole with aromatic aldehydes in alcohol media. T

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Gajdoš, Peter, Peter Magdolen, Pavol Zahradník, and Pavlína Foltínová. "New Conjugated Benzothiazole-N-oxides: Synthesis and Biological Activity." Molecules 14, no. 12 (2009): 5382–88. http://dx.doi.org/10.3390/molecules14125382.

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Eleven new 2-styrylbenzothiazole-N-oxides have been prepared by aldol – type condensation reactions between 2-methylbenzothiazole–N-oxide and para-substituted benzaldehydes. Compounds with cyclic amino substituents showed typical push-pull molecule properties. Four compounds were tested against various bacterial strains as well as the protozoan Euglena gracilis as model microorganisms. Unlike previously prepared analogous benzothiazolium salts, only weak activity was recorded.

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Kemisetti, Durgaprasad, Ruhul Amin, Faruk Alam, et al. "Novel Benzothiazole Derivatives Synthesis and its Analysis as Diuretic Agents." Evidence-Based Complementary and Alternative Medicine 2023 (April 12, 2023): 1–12. http://dx.doi.org/10.1155/2023/5460563.

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Benzothiazoles, an anticonvulsant, antiviral, antihypertensive, and cancer-fighting medication of the heterocyclic scaffold family, also acts as antibacterial and antiviral agents. There is much interest in this chemical’s production because of the strong and vital biological action it possesses. Substituted aromatic aldehydes were combined with 2-amino-benzothiazole-6-sulfonic acid amides, or Schiff base derivatives, to create Schiff base derivatives. Recrystallized, characterized, and tested for diuretic efficacy in vivo using online tools, m.p. (melting point), Rf, FTIR (Fourier transform i

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Rana, Arpana, Nadeem Siddiqui, Suroor A. Khan, Syed Ehtaishamul Haque, and Mashooq A. Bhat. "N-{[(6-Substituted-1,3-benzothiazole-2-yl)amino]carbonothioyl}-2/4-substituted benzamides: Synthesis and pharmacological evaluation." European Journal of Medicinal Chemistry 43, no. 5 (2008): 1114–22. http://dx.doi.org/10.1016/j.ejmech.2007.07.008.

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Gupta, Akhilesh. "SYNTHESIS OF NOVEL METHOXY SUBSTITUTED BENZOTHIAZOLE DERIVATIVES AND ANTIBACTERIAL ACTIVITY AGAINST ESCHERICHIA COLI." Asian Journal of Pharmaceutical and Clinical Research 11, no. 9 (2018): 416. http://dx.doi.org/10.22159/ajpcr.2018.v11i9.28095.

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Objectives: Escherichia coli is a Gram-negative rod (bacillus) in the family Enterobacteriaceae. In general, it is harmless, but some special species could cause harmful infection. In the recent era, the number of antibiotics is available to combat infection caused by E. coli but because of resistance developed against available antibiotics research is continuously going on to synthesize newer antibiotic to overcome this problem. Synthesis and screening of benzothiazole derivatives have great importance in heterocyclic chemistry because of its potent and significant biological activities again

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Journal, Baghdad Science. "Synthesis of substituted (oxazepine, Diazepine, tetrazde) via Schiff Bases for 2- Aminobenzo Thaizole Derivatives." Baghdad Science Journal 10, no. 3 (2013): 736–48. http://dx.doi.org/10.21123/bsj.10.3.736-748.

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This work includs synthesis of several Schiff bases by condensation of 6- methoxy – 2- amino benzothiazole with some aldehydes and ketones (2- hydroxyl benzaldehyde, 4- hydroxyl benzaldehyde, 4- N,N –dimethy amino acetophenone, benzophenone) to abtain schiff bases (1-5). These schiff bases were found to react with phthalate anhydride to give oxazepine derivatives (6-10) that were reacted with primary aromatic amines to give Diazepine derivatives (11-15). Besides, we prepared new tetrazole derivatives (16-20) from the reaction of the prepared Schiff bases with sodium azide in the prepared compo

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Racané, Livio, Mirela Sedić, Nataša Ilić, Maja Aleksić, Sandra Kraljević Pavelić, and Grace Karminski-Zamola. "Novel 2-Thienyl- and 2-Benzothienyl-Substituted 6-(2-Imidazolinyl)Benzothiazoles: Synthesis; in vitro Evaluation of Antitumor Effects and Assessment of Mitochondrial Toxicity." Anti-Cancer Agents in Medicinal Chemistry 17, no. 1 (2017): 57–66. http://dx.doi.org/10.2174/1871520615666160504094753.

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Background: Differently substituted thiophenes are largely studied due to their diverse pharmacological properties, especially anticancer activity. Recent studies have reported on interesting benzothiophene compounds antitumor properties and we also recently reported on the synthesis, strong antitumor activities and DNA binding features of substituted thieno[3',2':4,5]thieno- and benzo[b]thieno[2,3-c]quinolones, containing different substituents, mostly amidino- or substituted amidino- groups. Objective: The objective of presented paper was to prepare a series of novel cationic 2-thiophene and

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Pramod, Kumar Sahu, Kumar Sahu Praveen, and Dayal Agarwa Dau. "Design, synthesis and synergistic antioxidant, antibacterial, antifungal activity of nitrogen heterocycles." Journal of Indian Chemical Society Vol. 92, Feb 2015 (2015): 169–82. https://doi.org/10.5281/zenodo.5602614.

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School of Studies in Chemistry, Jiwaji University, Gwalior-474 011, Madhya Pradesh, India  Department of Industrial Chemistry, Jiwaji University, Gwalior-474 011, Madhya Pradesh, India <em>E-mail</em> : profdd.agarwal@gmail.com <em>Manuscript received 31 October 2014, accepted 31 December 2014</em> A convenient, facile and efficiently catalyzed synthesis of nitrogen heterocycles using aldehydes, 1,3-dicarbonyl and 3-amino-1,2,4-triazole/urea/thiourea/2-amino benzothiazole in the presence of L-proline at 65–70<sup>o</sup>C under solvent free conditions is being described. Results cle

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Verma, Abhay Kumar, Alex Martin, and Arun Kumar Singh. "Synthesis, Characterization and evaluation of Anti-inflammatory and Analgesic activity of Benzothiazole derivatives." Indian Journal of Pharmaceutical and Biological Research 2, no. 03 (2014): 84–89. http://dx.doi.org/10.30750/ijpbr.2.3.14.

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A parent benzothiazole nucleus was synthesized by para amino acetanilide, then it is subjected to treatment with various substituted aromatic aldehydes to get the corresponding Schiff’s bases followed by treatment with pthalic anhydride to form 2-(6- acetamidobenzo[d]thiazol-2-ylcarbamoyl)benzoic acid. The structures of synthesized compounds were confirmed by various spectroscopic methods such as IR, 1H NMR and mass spectroscopy. The products were evaluated for their anti-inflammatory and analgesic activities. Some of the compounds exhibited potent activities when compared with the standards.

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Rajareddy, Aleti 1. *. Srinivasa Murthy Muppavarapu 2. "SYNTHESIS AND CHARACTERIZATION OF NOVEL BENZOTHIAZOLE DERIVATIVES CONTAINING INDOLE MOIETIES WITH ANTIMICROBIAL ACTIVITIES." Journal of Scientific Research in Pharmacy 7, no. 10 (2018): 118–23. https://doi.org/10.5281/zenodo.1473391.

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<strong><em>ABSTRACT</em></strong> <strong><em>T</em></strong><em>he"(E)-5-chloro-1-((E)-1-((7-chloro-6-fluorobenzo[d]thiazol-2-yl)imino)ethyl)-3-(p-tolylimino)indolin-2-one" was to synthesize, purify, characterize and evaluate the biological activity of newly synthesized structural analogs of Benzothiazole derivatives Indole moieties. All these molecules (5a-5o) were characterized by FTIR, H<sup>1</sup>NMR and mass spectral analysis along with physical data. The biological potentials of the newly synthesized compounds are evaluated for their anti microbial activity</em><em> The stan

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Sharma, Arun Kumar, Rashmi Sharma, and Antima Gangwal. "Structural aspects and microbial analysis of copper surfactants substituted 2-Amino-6-Chloro Benzothiazole." Bulletin of Pure & Applied Sciences- Chemistry 39c, no. 1 (2020): 21. http://dx.doi.org/10.5958/2320-320x.2020.00003.5.

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Arafat, Mahmoud, Ehab Abdel-Latif, Fathy M. El-Taweel, Seif-Eldin N. Ayyad, and Khaled S. Mohamed. "Synthesis and biological assessment of new benzothiazolopyridine and benzothiazolyl- triazole derivatives as antioxidant and antibacterial agents." Bulletin of the Chemical Society of Ethiopia 36, no. 2 (2022): 451–63. http://dx.doi.org/10.4314/bcse.v36i2.17.

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ABSTRACT. A novel series of benzothiazolopyridine derivatives was synthesized via interaction of -2-(benzothiazol-2-yl)-3-(4-chlorophenyl)acrylonitrile (2) with a diverse of commercially available reagents (indandione, thiobarbituric acid, and malononitrile). Moreover, a novel group of benzothiazole linked substituted 1,2,3-triazole derivatives were synthesized by exploring the chemical behavior of 5-benzothiazolyl-2-(4-chlorophenyl)-triazol-4-amine through refluxing in glacial acetic acid, condensation with phthalic anhydride, and cyanoacetylation reactions. All newly synthetized compounds ha

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P. Kavitha and N. Vijayakumari. "SYNTHESIS AND CHARACTERIZATION OF BENZOTHIAZOLE SCHIFF BASES BASED METAL COMPLEXES AND THEIR BIOLOGICAL APPLICATIONS." RASAYAN Journal of Chemistry 18, no. 02 (2025): 1170–76. https://doi.org/10.31788/rjc.2025.1829261.

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A new benzothiazole Schiff base ligand named (E)-N-(6-((2-hydroxy-5-methylbenzylidene)amino)benzo[d]thiazol-2- yl)cyclohexane-carboxamide (BSB) was prepared through the condensation reaction of N-(6-aminobenzo[d]thiazol2-yl)cyclohexane-carboxamide with substituted aldehyde. Mass, FT-IR, NMR, and spectral techniques confirmed the synthesized ligand. The resulting compound was tested with the coordination behavior of a series of various d-block metal ions named Cu2+, Zn2+, Co2+, and Ni2+, with the prepared (BSB) reported. The bonding behavior and the complexes' performance have been assumed as p

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Sultana, Shaheen, P. Pandian, and B. Rajkamal. "Microwave-Assisted Synthesis, Molecular Docking Studies and Biological Evaluation of Benzothiazole Containing Novel Indole Derivatives." Asian Journal of Chemistry 33, no. 11 (2021): 2755–61. http://dx.doi.org/10.14233/ajchem.2021.23404.

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The synthesis of novel indole derivatives 4a-o using a microwave assisted method via Schiff’s base and Mannich base reaction mechanism was described. Compounds 3a-c were synthesized via reaction of 2-amino benzothiazole with substituted isatin by Schiff base reaction mechanism. Also, indole derivatives 4a-o were synthesized via reaction of compounds 3a-c with substituted benzaldehydes by Mannich base reaction. The biological potentials of the newly synthesized indole derivatives were evaluated for their anthelmintic activity and in vitro anticancer activity by MTT assay. The anticancer activit

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Kotte, Raju, and Girija Sastry Vedula. "Design, Synthesis and Anticancer Activity of Benzothiazole Hybrids: Insights from Molecular Docking Studies." Asian Journal of Chemistry 37, no. 3 (2025): 521–28. https://doi.org/10.14233/ajchem.2025.33158.

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A series of benzothiazole hybrids 5a-n bearing acetamide and benzamide functionalities were synthesized and evaluated for their anticancer activity and binding affinity with epidermal growth factor receptor (EGFR) targets, 4WKQ and 6LUD. The synthesis involved the synthesis of 6-hydroxy-2-aminobenzothiazole, followed by methylation and coupling with carboxylic acids to yield benzothiazole hybrid compounds. The structures of the synthesized compounds were confirmed using analytical techniques such as 1H NMR, 13C NMR and HRMS techniques. Molecular docking studies indicated that the hydroxyl (-OH

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Rawat, Bhupender Singh, and S. C. Mehra. "SYNTHESIS OF SOME NEW 1, 3-DI METHYL SUBSTITUTED GUANIDINE WITH POSSIBLE ANTIBACTERIAL AND ANTIFUNGAL ACTIVITY." Green Chemistry & Technology Letters 2, no. 3 (2016): 138–40. http://dx.doi.org/10.18510/gctl.2016.233.

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The compounds containing thiazole, thiadiazole, oxazole, oxadiazole, imidazole, pyrimidine, pyridine & benzothiazole rings have been found to exhibit broad spectrum of biological activities.Derivatives of 1, 2, 4-thiadiazole and 1, 2, 4-thiadiazolidines exhibit antibacterial and antifungal activity1. Thiazolyl guanidines2 and various substituted aryl guanidine’s have been found to exhibit antibacterial & antifungal activities3.Keeping all these views in mind attempts were made to synthesized some new 1,3-di methyl Substituted Guanidine.In the present work 2,4 Dimethyl -3,5-(di Aryl imi

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Sharma, Arun Kumar, Rashmi Sharma, and Antima Gangwal. "Antifungal Activities and Characterization of Some New Environmentally Safe Cu (II) Surfactants Substituted 2-Amino-6-Methyl Benzothiazole." Open Pharmaceutical Sciences Journal 5, no. 1 (2018): 1–11. http://dx.doi.org/10.2174/1874844901805010001.

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Background:Biologically potent compounds are one of the most important classes of materials for the upcoming generations.Objectives:Increasing number of microbial infectious diseases and resistant pathogens create a demand and urgency to develop novel, potent, safe and improved variety of antimicrobial agents.Methods:The copper surfactants substituted 2-amino-6-methyl benzothiazole were synthesized. The synthesized complexes have been characterized by IR, NMR, ESR spectroscopic methods. The antifungal activities have been evaluated by testing againstAlternaria alternatefungi. All complexes sho

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Swarnkar, Pawan Kumar, P. Kriplani, G. N. Gupta, and K. G. Ojha. "Synthesis and Antibacterial Activity of Some New Phenothiazine Derivatives." E-Journal of Chemistry 4, no. 1 (2007): 14–20. http://dx.doi.org/10.1155/2007/402673.

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A series of some new phenothiazine derivatives were synthesized with the objective for evaluation as antimicrobials. The title compounds were prepared by a five step synthesis scheme. 2-Amino-6-substituted benzothiazoles (1) on diazotization afford 6-substituted benzothiazolyl-2-diazonium chlorides (2). Reaction of 2 with cold solution ofβ-naphthol in dilute NaOH furnishesα-(2-diazo-6-substituted benzothiazolyl)-β-sodionaphthoxides (3) which on acidification with concentrated HCl givesα-(2-diazo-6-substituted benzothiazolyl)-β-naphthols (4). Reaction of 4 with p-substituted anilines givesα-(2-

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Drake, John E., Michael B. Hursthouse, Prashant Kriplani, et al. "Facile synthesis of novel 2-(4′-N,N-dimethylbenzylidenoimino)-6-substituted-1,3-benzothiazoles and crystal structures of 2-(4′-N,N-dimethylbenzylidenoimino)-6-chloro-1,3-benzothiazole and the co-crystal of 2-amino-6-nitro-1,3-benzothiazole and 4-(N,N-dimethylamino)benzaldehyde." Main Group Chemistry 8, no. 1 (2009): 21–32. http://dx.doi.org/10.1080/10241220902962911.

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45

Ahlawat, Aarti, Vikramjeet Singh, and Sonika Asija. "Synthesis, characterization, antimicrobial evaluation and QSAR studies of organotin(IV) complexes of Schiff base ligands of 2-amino-6-substituted benzothiazole derivatives." Chemical Papers 71, no. 11 (2017): 2195–208. http://dx.doi.org/10.1007/s11696-017-0213-9.

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46

Sridevi, CH, K. Balaji, A. Naidu, and R. Sudhakaran. "Antimicrobial Evaluation and Synthesis of Some Phenylpyrazolo benzothiazolo quinoxaline Derivatives." E-Journal of Chemistry 6, no. 3 (2009): 866–70. http://dx.doi.org/10.1155/2009/324358.

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2,3-Diphenyl quinoxaline(SI)was fused with 2-amino benzothiazoles(SII)by a methylene bridge, which was then allowed for acetylation. The acetylated product (SIV) was made to react with different aromatic aldehydes to give chalcones(SV1-SV5). Chalcones refluxed with substituted acid hydrazides to afford different phenyl pyrazolo benzothiazolo quinoxaline derivatives(SVI1-SVI15). The structure of chalcones and phenyl pyrazolo benzothiazolo quinoxaline derivatives were confirmed by M.P, TLC and spectral data. All the synthesized compounds were screened for their antimicrobial activities.

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Baheti, K. G., and S. V. Kuberkar. "Novel Synthesis of 3-Amino-4-oxo-(2H)-pyrazolo[3′,4′:4,5]pyrimido-[2,1-b]benzothiazole and its 2- and 3-Substituted Derivatives." Journal of Heterocyclic Chemistry 40, no. 3 (2003): 547–51. http://dx.doi.org/10.1002/jhet.5570400322.

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Yurttaş, Leyla, Bahar Demir, and Gülşen A. Çiftçi. "Some Thiazole Derivatives Combined with Different Heterocycles: Cytotoxicity Evaluation and Apoptosis Inducing Studies." Anti-Cancer Agents in Medicinal Chemistry 18, no. 8 (2018): 1115–21. http://dx.doi.org/10.2174/1871520618666180328115314.

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Background: Thiazole ring is an outstanding structure found in many biologically active compounds and clinically available drugs. Because of synthesis simplicity of its derivatives and having a wide range of biological aspects along with high effectiveness, new thiazole derivatives have been studied by medicinal chemists since many years. Objective: Some thiazole compounds combined with different heterocyclic rings were acquired in this study. Novel 5-(4-substituted benzylidene)-2-[(4,5-dimethylthiazol-2-yl)amino]thiazol-4(5H)-one derivatives (4a-g) and 2-(heteroaryl-2/3/5-yl)thio-N-(4,5-dimet

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Nayak, Janardhana, and Ramesh S. Bhat. "Synthesis, Antimicrobial and Corrosion Inhibition Studies of 1,3-Benzothiazole Derivatives." Asian Journal of Chemistry 35, no. 2 (2023): 375–78. http://dx.doi.org/10.14233/ajchem.2023.26885.

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With an emphasis on potential medicinal and corrosion inhibition applications, four N-(4-(substituted benzylidene)benzo[d]thiazol-2-amine were synthesized by the condensation of 2,3-dihydro-1,3- benzothiazol-2-amine with 4-substituted benzaldehydes. Nuclear magnetic resonance (NMR), infrared (IR) and mass spectroscopy were used to characterize the synthesized compounds. To assess the antibacterial activity of synthetic drugs, the conventional serial dilution approach has been used. The synthesized compounds showed excellent bioactivities comparable to those of a typical medication. The corrosi

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Mishra, Neha, Takallum Khan, Himanshu Pandey та ін. "An Atom Economical Concise Green Synthetic Protocol for the Synthesis of 4-Substituted Benzylidene β-Lactams Easy Access by P2O5/SiO2 Catalyzed Schiff Base". Asian Journal of Organic & Medicinal Chemistry 5, № 1 (2020): 56–61. http://dx.doi.org/10.14233/ajomc.2020.ajomc-p231.

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A simple and efficient protocol for the synthesis of Schiff bases via condensation reaction of electron rich heterocyclic amines with electrophilic carbon of the carbonyl compound. Recently an impressive and important area in catalysis involved organic synthesis is the best implementation of Lewis acids as a acid catalyst for Schiff base synthesis. The higher acidic property and proper loading of catalyst leads to proper participation in reaction as a catalyst. The reactions of these Lewis acids are enhanced by porous solid support as heterogeneous catalyst. We report herein an efficient conci

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