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Journal articles on the topic 'Benzo[b]-1'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Arul Clement, J., Pethaiah Gunasekaran, and Arasambattu K. Mohanakrishnan. "Synthesis and characterization of benzo[c]thiophene analogs incorporating benzo[b]thiophene/1-hexylindole/benzo[b]furan." Tetrahedron 65, no. 21 (2009): 4113–23. http://dx.doi.org/10.1016/j.tet.2009.03.059.

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2

BHASKAR, J. UDAYA, G. SRINIVASA RAO, B. PULLA RAO, PRANAB CHATTERJEE, D. K. SAHOO, and S. SRINIVASA RAO. "Design, Synthesis, Structural Characterization and Antimicrobial Screening of Several Novel Benzothiophene Linked Thiazolidines." Asian Journal of Chemistry 35, no. 9 (2023): 2176–80. http://dx.doi.org/10.14233/ajchem.2023.27958.

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A novel sequence of (19E)-(3-(benzo[b]thiophen-3-yl)-N′-((Z)-5-benzyliden-4-oxo-3-phenyl thiazolidin-2-ylidene)propanehydrazides (6a-f) was synthesized in moderate to good yields from the final intermediate, (E)-(3-(benzo[b]thiophen-3-yl)-N′-(4-oxo-3-phenylthiazolidin- 2-ylidene)propane hydrazide (5). In present work, 3-(benzo[b]thiophen-3-yl)propanoic acid (1) was selected as raw material and compounds such as 1-(benzo[b]thiophen-3-yl)pentan-3-one (2), 3-(benzo[b]thiophen-3-yl)propanehydrazide (3) and 1-(3-(benzo[b]- thiophen-3-yl)-propanoyl)-4-phenylsemicarbazide (4) were materialized as int

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3

Truong, Minh Anh, and Koji Nakano. "Syntheses of dibenzo[d,d']benzo[2,1-b:3,4-b']difuran derivatives and their application to organic field-effect transistors." Beilstein Journal of Organic Chemistry 12 (April 26, 2016): 805–12. http://dx.doi.org/10.3762/bjoc.12.79.

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Ladder-type π-conjugated compounds containing a benzo[2,1-b:3,4-b']difuran skeleton, such as dibenzo[d,d']benzo[2,1-b:3,4-b']difuran (syn-DBBDF) and dinaphtho[2,3-d:2',3'-d']benzo[2,1-b:3,4-b']difuran (syn-DNBDF) were synthesized. Their photophysical and electrochemical properties were revealed by UV–vis absorption and photoluminescence spectroscopy and cyclic voltammetry. Organic field-effect transistors (OFETs) were fabricated with these compounds as organic semiconductors, and their semiconducting properties were evaluated. OFETs with syn-DBBDF and syn-DNBDF showed typical p-type characteri

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4

Portilla, Jaime, Jairo Quiroga, Manuel Nogueras, et al. "Structural comparisons of isomeric series of 7-aryl-benzo[h]pyrazolo[3,4-b]quinolines and 11-aryl-benzo[f]pyrazolo[3,4-b]quinolines." Acta Crystallographica Section B Structural Science 64, no. 1 (2008): 72–83. http://dx.doi.org/10.1107/s0108768107065743.

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The structures of three new 7-aryl-benzo[h]pyrazolo[3,4-b]quinolines, 8-methyl-7-(4-chlorophenyl)-10-phenyl-6,10-dihydro-5H-benzo[h]pyrazolo[3,4-b]quinoline, C27H20ClN3, 8-methyl-7-(3-pyridinyl)-10-phenyl-6,10-dihydro-5H-benzo[b]pyrazolo[3,4-b]quinoline, C26H20N4, and 8-methyl-7-(4-pyridinyl)-10-phenyl-10H-benzo[h]pyrazolo[3,4-b]quinoline, C26H18N4, which is an unexpected oxidation product isolated from the attempted synthesis of 8-methyl-7-(4-pyridinyl)-10-phenyl-6,10-dihydro-5H-benzo[h]pyrazolo[3,4-b]quinoline, and those of three new 11-aryl-benzo[f]pyrazolo[3,4-b]quinolines, 11-(4-methylphe

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5

Acosta Quintero, Lina M., Isidro Burgos, Alirio Palma, Justo Cobo, and Christopher Glidewell. "A concise, efficient and versatile synthesis of amino-substituted benzo[b]pyrimido[5,4-f]azepines: synthesis and spectroscopic characterization, together with the molecular and supramolecular structures of three products and one intermediate." Acta Crystallographica Section C Structural Chemistry 74, no. 3 (2018): 312–20. http://dx.doi.org/10.1107/s2053229618002176.

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A concise, efficient and versatile synthesis of amino-substituted benzo[b]pyrimido[5,4-f]azepines is described: starting from a 5-allyl-4,6-dichloropyrimidine, the synthesis involves base-catalysed aminolysis followed by intramolecular Friedel–Crafts cyclization. Four new amino-substituted benzo[b]pyrimido[5,4-f]azepines are reported, and all the products and reaction intermediates have been fully characterized by IR,1H and13C NMR spectroscopy and mass spectrometry, and the molecular and supramolecular structures of three products and one intermediate have been determined. In each ofN,2,6,11-t

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6

Wojciechowski, Krzysztof, and Michał Nowacki. "Synthesis of [1]Benzothieno[2,3-b]quinolines via Transition-Metal-Free [3+3] Annulation of Nitroarenes and Benzo[b]thiophen-3-ylacetonitrile or 3-(Phenylsulfonylmethyl)benzo[b]thiophene Carbanions." Synthesis 49, no. 16 (2017): 3794–800. http://dx.doi.org/10.1055/s-0036-1588426.

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Benzo[b]thiophen-3-ylacetonitriles or 3-(phenylsulfonylmethyl)benzo[b]thiophenes react with nitrobenzene derivatives in the presence of potassium tert-butoxide and chlorotrimethylsilane to form, in good yields, 11-cyano- or 11-(phenylsulfonyl)[1]benzothieno[2,3-b]quinolines, respectively.

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7

El-Agrody, Ahmed M., Fathy A. Eid, Hussein A. Emam, Hany M. Mohamed, and Ahmed H. Bedair. "Synthesis of 9-Methoxy and 9-Acetoxy-3-amino-1-(4-methoxyphenyl)- 1H-benzo[f]chromene-2-carbonitriles via 2-(Imino-piperidin-1-yl-methyl)- 3-(4-methoxyphenyl)acrylonitrile as Intermediate." Zeitschrift für Naturforschung B 57, no. 5 (2002): 579–85. http://dx.doi.org/10.1515/znb-2002-0516.

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Several new 1H-benzo[f]chromene derivatives (3aÐd) were prepared by the reaction of 7-substituted-2-naphthols (1a,b) with substituted α-cyano-4-methoxycinnamonitriles (2a,b) together with 2-(imino-piperidin-1-yl-methyl)-3-(4-methoxyphenyl)acrylonitrile (4) as intermediate. Also, the reaction of 1a,b with 4 without catalyst afforded 9-methoxy and 9-acetoxy- 3-amino-1-(p-methoxyphenyl)-1H-benzo[f]chromene-2-carbonitrile (3b,e). The reaction of 3a,b with different electrophilic and nucleophilic reagents afforded the 12H-7-oxa-8,10-diazabenzo[ a]anthracene derivatives 5, 9, 10 and 1H-benzo[f]chrom

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8

Kachhadia, V. V., M. R. Patel, and H. S. Joshi. "Heterocyclic systems containing S/N regioselective nucleophilic competition: Facile synthesis, antitubercular and antimicrobial activity of thiohydantoins and iminothiazolidinones containing the benzo." Journal of the Serbian Chemical Society 70, no. 2 (2005): 153–61. http://dx.doi.org/10.2298/jsc0502153k.

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The required compounds N-aryl-N'-(3-chloro-2-benzo[b]thenoyl)-thioureas 1a-k were prepared by condensing 3-chloro-2-benzo[b]thenoyl chloride with different arylamines using ammonium thiocyanate, which in turn when treated with chloroacetic acid, yielded 1-aryl-3-(3-chloro-2-benzo[b]thenoyl)thiohydantoins 2a-k, while in the presence of sodium acetate treated with chloroacetic acid, yielded 2-arylimino-3-(3-chloro-2-benzo[b]thenoyl)-4-thiazolidinones 3a-k. All the synthesized compounds were screened for their antitubercular and antimicrobial activities. Some selected compounds were selected for

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9

Ryu, Seunghyup, Chaeyoung Yun, Soomin Ryu, Jihae Ahn, Choongik Kim, and Sungyong Seo. "Characterization of [1]Benzothieno[3,2-b]benzothiophene (BTBT) Derivatives with End-Capping Groups as Solution-Processable Organic Semiconductors for Organic Field-Effect Transistors." Coatings 13, no. 1 (2023): 181. http://dx.doi.org/10.3390/coatings13010181.

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Solution-processable [1]benzothieno[3,2-b]benzothiophene (BTBT) derivatives with various end-capping groups, 2-(phenylethynyl)benzo[b]benzo[4,5]thieno[2,3-d]thiophene (Compound 1), 2-octyl-7-(5-(phenylethynyl)thiophen-2-yl)benzo[b]benzo[4,5]thieno[2,3-d]thiophene (Compound 2), and triisopropyl((5-(7-octylbenzo[b]benzo[4,5]thieno[2,3-d]thiophen-2-yl)thiophen-2-yl)ethynyl)silane (Compound 3), have been synthesized and characterized as active layers for organic field-effect transistors (OFETs). Thermal, optical, and electrochemical properties of the newly synthesized compounds were characterized

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10

Katzsch, Felix, Tobias Gruber, and Edwin Weber. "Crystal structures of functional building blocks derived from bis(benzo[b]thiophen-2-yl)methane." Acta Crystallographica Section C Structural Chemistry 72, no. 9 (2016): 679–84. http://dx.doi.org/10.1107/s2053229616012973.

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The syntheses of three bis(benzo[b]thiophen-2-yl)methane derivatives, namely bis(benzo[b]thiophen-2-yl)methanone, C17H10OS2, (I), 1,1-bis(benzo[b]thiophen-2-yl)-3-(trimethylsilyl)prop-2-yn-1-ol, C22H20OS2Si, (II), and 1,1-bis(benzo[b]thiophen-2-yl)prop-2-yn-1-ol, C19H12OS2, (III), are described and their crystal structures discussed comparatively. The conformation of ketone (I) and the respective analogues are rather similar for most of the compounds compared. This is true for the interplanar angles, the Caryl—Cbridge—Carylangles and the dihedral angles. The best resemblance is found for a bio

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11

Bandaru, Siva Sankar Murthy, Darinka Dzubiel, Heiko Ihmels, Mohebodin Karbasiyoun, Mohamed M. A. Mahmoud, and Carola Schulzke. "Synthesis of 9-arylalkynyl- and 9-aryl-substituted benzo[b]quinolizinium derivatives by Palladium-mediated cross-coupling reactions." Beilstein Journal of Organic Chemistry 14 (July 23, 2018): 1871–84. http://dx.doi.org/10.3762/bjoc.14.161.

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9-Arylbenzo[b]quinolizinium derivatives were prepared with base-free Suzuki–Miyaura coupling reactions between benzo[b]quinolizinium-9-trifluoroborate and selected benzenediazonium salts. In addition, the Sonogashira coupling reaction between 9-iodobenzo[b]quinolizinium and the arylalkyne derivatives yielded four novel 9-(arylethynyl)benzo[b]quinolizinium derivatives under relatively mild reaction conditions. The 9-(N,N-dimethylaminophenylethynyl)benzo[b]quinolizinium is only very weakly emitting, but the emission intensity increases by a factor >200 upon protonation, so that this derivativ

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12

Chen, Kew-Yu, Ming-Jen Chang, and Tzu-Chien Fang. "1-Hydroxy-11H-benzo[b]fluoren-11-one." Acta Crystallographica Section E Structure Reports Online 68, no. 1 (2011): o16. http://dx.doi.org/10.1107/s160053681104760x.

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13

Fang, Sin-Kai, Che-Wei Chang, Hsing-Yang Tsai, Ming-Hui Luo, and Kew-Yu Chen. "1-Methoxy-11H-benzo[b]fluoren-11-one." Acta Crystallographica Section E Structure Reports Online 69, no. 1 (2012): o79. http://dx.doi.org/10.1107/s1600536812050076.

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14

Godzik, Barbara, Grażyna Szarek-Łukaszewska, Paweł Kapusta, and Katarzyna Stępień. "PAHs Concentrations in Poland Using Moss Pleurozium Schreberi as Bioindicator." Polish Botanical Journal 59, no. 1 (2014): 137–44. http://dx.doi.org/10.2478/pbj-2014-0019.

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Abstract Concentrations of PAHs in the moss Pleurozium schreberi (Brid.) Mitt. were compared in three regions differing in degree of industrialization and urbanization: the Silesia-Cracow region (heavily polluted), Mazovia (moderately polluted) and Podlasie (northeast Poland, control area). Ten moss samples of moss were taken from each area. PAH concentrations were determined by HPLC. Total PAHs levels in P. schreberi varied depending on the region: mean 7350 (± 4075) ng kg−1 d. wt. for the Silesia-Cracow region, mean 2127 (± 1686) ng kg−1 d. wt. for Mazovia, and mean 838 (± 943) ng kg−1 d. wt

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15

Królewska-Golińska, Karolina, Marcin J. Cieślak, Milena Sobczak, et al. "Novel Benzo[B]Furans with Anti-Microtubule Activity Upregulate Expression of Apoptotic Genes and Arrest Leukemia Cells in G2/M Phase." Anti-Cancer Agents in Medicinal Chemistry 19, no. 3 (2019): 375–88. http://dx.doi.org/10.2174/1871520619666181122123552.

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Background:Novel derivatives of benzo[b]furan were found to be highly toxic towards human chronic myelogenous (K562), acute myelogenous (HL-60) and acute lymphoblastic (MOLT-4) leukemia cells.Objective:The objective was the characterization of the biological activity of novel benzofurans (influence on apoptosis, mitogen-activated protein kinases and on the cell cycle). Cellular protein(s) targeted by test benzofurans and mechanism of action were identified.Methods:The methods utilized in the study were chemical synthesis, fluorescence assays, flow cytometry, gene expression by DNA microarray a

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16

Markosyan, A. I., A. S. Ayvazyan, S. H. Gabrielyan, S. S. Mamyan, A. A. Ayvazyan, and H. H. Arakelyan. "Synthesis, some transformations and antibacterial activity of 5<i>H</i>-spiro[benzo[<i>h</i>][1,2,4]triazolo[3,4-<i>b</i>]quinazoline6,1′-cycloheptane]-7(11<i>H</i>)-ones." Журнал общей химии 93, no. 3 (2023): 363–73. http://dx.doi.org/10.31857/s0044460x23030046.

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Condensation of 2-thioxo-2,3-dihydro-1 H -spiro[benzo[ h ]quinazoline-5,1′-cycloheptane]-4(6 H )-one with hydrazine hydrate afforded 2-hydrazinyl-3 H -spiro[benzo[ h ]quinazoline-5,1′-cycloheptane]-4(6 H )-one. The reaction of the latter with orthoformic acid ethyl ester or carbon disulfide yielded 5 H -spiro[benzo[ h ][1,2,4]triazolo[3,4- b ]quinazoline-6,1′-cycloheptane]-7(11 H )-one and 9-mercapto-5 H -spiro[benzo[ h ][1,2,4]triazolo[3,4- b ] quinazoline-6,1 ‘-cycloheptane]-7(11 H )-one, respectively. Alkylation of the latter with methyl and ethyl iodides, allyl bromide, and benzyl chloride

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17

Florea, Stelian, Anca Nicolae, and Ovidiu Maior. "SYNTHESIS OF NEW BENZO[e]DIBENZOFURO[2,3-b]-OXEPIN-5(14H)-ONES." SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 4, no. 4 (1996): 101–8. http://dx.doi.org/10.48141/sbjchem.v4.n4.1996.101_1996.pdf.

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The new ring systems, benzo[e]dibenzofuro[2,3-b]oxepin-5(14H)-one and benzo[e]dibenzofuro[2,1-b]oxepin-5(14H)-one were obtained by cyclizing of 2-(2-dibenzoftuyloxymethyl)benzoic acid in the presence of polyphosphoric acid ester.By cyclization of the 2-(1-methoxy-2-dibenzofuryloxymethyl) benzoic acid was obtained benzo[e]dibenzofuro[2,3-b]-oxepin-12-methoxy-5-one with a indubitable structure. The structure of the new compounds was proved by means of 1H-and 13C-NMR spectra.

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18

Wu, Manli, Huining Xu, Ya Yu, and Lili Wang. "High performance liquid chromatography–tandem mass spectrometry for rapid and sensitive analysis of six polycyclic aromatic hydrocarbons in wastewater." Water Science and Technology 64, no. 2 (2011): 477–84. http://dx.doi.org/10.2166/wst.2011.710.

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A sensitive and fast method was developed to quantitatively analyse the six polycyclic aromatic hydrocarbons (fluoranthene (FLT), benzo[b]fluoranthene (BbF), benzo[k]fluoranthene (BkF), benzo[a]pyrene (Bap), benzo[ghi]perylene (BghiP) and indeno[1,2,3-cd]pyrene (INPY)) by high performance liquid chromatography (UPLC) coupling with tandem mass spectrometry (MS/MS). Chromatographic separation was performed on a Waters Acquity UPLCTM BEHC18 column (1.7 μm, 2.1 mm × 50 mm). A 0.2 μm precolumn filter was used to protect the analytical column. Mobile phase A was acetonitrile containing 0.5% toluene.

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19

Henry, R., R. R. Copp, and C. F. Wong. "N-[1-(2-Benzo[b]thienyl)ethyl]-N'-carbamoylurea and 1-[1-(2-Benzo[b]thienyl)ethyl][1,3,5]triazine-2,4,6-trione Methanol Solvate." Acta Crystallographica Section C Crystal Structure Communications 52, no. 8 (1996): 2032–35. http://dx.doi.org/10.1107/s0108270195017215.

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20

Luz, Eduardo Q., Francielli S. Santana, Gabriel L. Silverio, et al. "Crystal structures of 3-halo-2-organochalcogenylbenzo[b]chalcogenophenes." Acta Crystallographica Section E Crystallographic Communications 78, no. 3 (2022): 275–81. http://dx.doi.org/10.1107/s2056989022000962.

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The structure of the title compounds 3-bromo-2-(phenylsulfanyl)benzo[b]thiophene (C14H9BrS2; 1), 3-iodo-2-(phenylsulfanyl)benzo[b]thiophene (C14H9IS2; 2), 3-bromo-2-(phenylselanyl)benzo[b]selenophene (C14H9BrSe2; 3), and 3-iodo-2-(phenylselanyl)benzo[b]selenophene (C14H9ISe2; 4) were determined by single-crystal X-ray diffraction; all structures presented monoclinic (P21/c) symmetry. The phenyl group is distant from the halogen atom to minimize the steric hindrance repulsion for all structures. Moreover, the structures of 3 and 4 show an almost linear alignment of halogen–selenium–carbon atoms

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21

Wang, Yu-Hsuan, Joshua F. Bailey, Jeffrey L. Petersen, and Kung K. Wang. "Synthesis of 5-(2-methoxy-1-naphthyl)- and 5-[2-(methoxymethyl)-1-naphthyl]-11H-benzo[b]fluorene as 2,2'-disubstituted 1,1'-binaphthyls via benzannulated enyne–allenes." Beilstein Journal of Organic Chemistry 7 (April 19, 2011): 496–502. http://dx.doi.org/10.3762/bjoc.7.58.

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5-(2-Methoxy-1-naphthyl)- and 5-[2-(methoxymethyl)-1-naphthyl]-11H-benzo[b]fluorene were synthesized by treatment of the corresponding benzannulated enediynes with potassium tert-butoxide in refluxing toluene to give benzannulated enyne–allenes for the subsequent Schmittel cascade cyclization reactions. The structures of these two 5-(1-naphthyl)-11H-benzo[b]fluorenes could be regarded as 2,2'-disubstituted 1,1'-binaphthyls with the newly constructed benzofluorenyl group serving as a naphthyl moiety.

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Abd El-Aal, Hassan A. K., and Ali A. Khalaf. "Friedel–Crafts Chemistry. Part 46. Unprecedented Construction of Tricyclic Pyrazolo[3,4-b]quinolines, -[1,8]naphthyridines, -azepines, -azocines, -pyrido[3,2-g]azocines, and pyrazolo[3,4-b]azonines via Friedel–Crafts Ring Closures." Australian Journal of Chemistry 69, no. 6 (2016): 652. http://dx.doi.org/10.1071/ch15526.

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A series of keto-substituted pyrazolo[3,4-b]quinolines, pyrazolo[3,4-b][1,8]naphthyridines, benzo[e]pyrazolo[3,4-b]azepines, benzo[g]pyrazolo[3,4-b]azocines, pyrazolo[3,4-b]pyrido[3,2-g]azocines, and benzo[g]pyrazolo[3,4-b]azonines scaffolds were synthesized via a Friedel–Crafts cyclialkylation approach. The precursor acids were obtained by utilizing the modified Ullman coupling reactions of 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-carboxylic acid with different aryl amines followed by ring closures in the presence of AlCl3/CH3NO2 or P2O5 or polyphosphoric acid catalysts. Particular attention

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Tucker, Sheryl A., and William E. Acree. "Excitation versus Emission Spectra as a Means to Examine Selective Fluorescence Quenching Agents." Applied Spectroscopy 46, no. 9 (1992): 1388–92. http://dx.doi.org/10.1366/0003702924123755.

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To ascertain whether fluorescence quenching is best studied with the use of excitation or emission spectra, and to expand our existing PAH spectral data file, we have recorded excitation spectra of benzo[b]perylene, dibenzo[hi,wx]heptacene, tetrabenzo[de,hi,mn,qr]naphthacene, perylene, benzo[a]fluoranthene, benzo[def]indeno[1,2,3hi]chrysene, naphtho[2,1a]fluoranthene, naphtho[2,3b]fluoranthene, benzo[k]fluoranthene, 2-azapyrene, naphtho[8,1,2hij]pyreno[9,10,1def]phthalazine, indeno[1,-2,3ij]isoquinoline, benzo(lmn][3,8]phenanthroline, and 7-methyldibenzo(b,def]chrysene at various nitromethane

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Silva, Monise Ellen Alves da, Daniel Ricardo Arsand, Charles Soares Huber, and Pedro José Sanches Filho. "Determinação de HPAs em preparações comerciais com base em pimenta." Revista Ibero-Americana de Ciências Ambientais 12, no. 6 (2021): 483–98. http://dx.doi.org/10.6008/cbpc2179-6858.2021.006.0040.

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Este estudo avalia a presença e os níveis de hidrocarbonetos policíclicos aromáticos (HPAs) em amostras comercias de pimentas, usando extração sob ultrassom acompanhada de etapas de cleanup e determinação por cromatografia gasosa acoplada à espectrometria de massas. Foram avaliados os 16 HPAs listados como contaminantes ambientais prioritários pela United States Environmental Protection Agency e utilizados como parâmetros a soma de Benzo(a)Antraceno, Criseno, Benzo(b)Fluoranteno e Benzo(a)Pireno os HPAs 4, indicadores usados pela Agência Europeia de Segurança Alimentar para a presença desta cl

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Nguyen, Chi Hung, Émile Bisagni, and Jean-Marc Lhoste. "Synthèse de dérivés N-5 substitués des 5H-pyrido[4,3-b]benzo[f]indoles, isomères des 6H-pyrido[4,3-b]carbazoles (ellipticines)." Canadian Journal of Chemistry 64, no. 3 (1986): 545–51. http://dx.doi.org/10.1139/v86-087.

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2-Lithio dérivatives of 1-alkyl-4-chloropyrrolo[3,2-c]pyridines react with acetophenones, giving the corresponding tertiary alcohols. After déhydration into 1,1-diarylethylenes and subsequent reduction to 1,1 -diarylethanes, the synthesis of 1-chloro-5-alkyl-5H-pyrido[4,3-b]benzo[f]indoles was achieved either by direct cyclization with dichloromethylmethylether plus stannic chloride or by formylation and cyclodehydration with polyphosphoric acid. Finally, the substitution of the chlorine atom with dialkylaminoalkylamines leads to 1-amino substituted 5-alkyl-5H-pyrido[4,3-b]benzo[f]indoles, iso

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Nauth, Stephanie D., and Andres D. Campiglia. "Sorption of Polycyclic Aromatic Sulfur Heterocycles (PASH) on Nylon Microplastics at Environmentally Relevant Concentrations." Molecules 29, no. 7 (2024): 1653. http://dx.doi.org/10.3390/molecules29071653.

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Microplastics have garnered an infamous reputation as a sorbate for many concerning environmental pollutants and as a delivery vehicle for the aquatic food chain through the ingestion of these contaminated small particulates. While sorption mechanisms have been extensively studied for polycyclic aromatic hydrocarbons, polycyclic aromatic sulfur heterocycles (PASHs) have not been investigated, partly due to their low concentrations in aquatic ecosystems. Herein, an analytical methodology is presented for the analysis of dibenzothiophene, benzo[b]naphtho[1,2-b]thiophene, benzo[b]naphtho[2,1-b]th

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27

Kar, Gandhi K., Basanta G. Chatterjee, and Jayanta K. Ray. "SYNTHESIS OF ACENAPHTHO[1, 2-b]BENZO[d]THIOPHENE." Organic Preparations and Procedures International 20, no. 3 (1988): 213–22. http://dx.doi.org/10.1080/00304948809355813.

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Dann, Otto, Helmut Char, Paul Fleischmann, and Helmut Fricke. "Synthese antileukämischer Indolylvinyl-1-benzofurane und-benzo[b]thiophene." Liebigs Annalen der Chemie 1986, no. 3 (1986): 438–55. http://dx.doi.org/10.1002/jlac.198619860304.

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29

Penthala, Narsimha Reddy, Jaishankar K. B. Yadlapalli, Sean Parkin, and Peter A. Crooks. "Crystal structures of (Z)-5-[2-(benzo[b]thiophen-2-yl)-1-(3,5-dimethoxyphenyl)ethenyl]-1H-tetrazole and (Z)-5-[2-(benzo[b]thiophen-3-yl)-1-(3,4,5-trimethoxyphenyl)ethenyl]-1H-tetrazole." Acta Crystallographica Section E Crystallographic Communications 72, no. 5 (2016): 652–55. http://dx.doi.org/10.1107/s2056989016005600.

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(Z)-5-[2-(Benzo[b]thiophen-2-yl)-1-(3,5-dimethoxyphenyl)ethenyl]-1H-tetrazole methanol monosolvate, C19H16N4O2S·CH3OH, (I), was prepared by the reaction of (Z)-3-(benzo[b]thiophen-2-yl)-2-(3,5-dimethoxyphenyl)acrylonitrile with tributyltin azideviaa [3 + 2]cycloaddition azide condensation reaction. The structurally related compound (Z)-5-[2-(benzo[b]thiophen-3-yl)-1-(3,4,5-trimethoxyphenyl)ethenyl]-1H-tetrazole, C20H18N4O3S, (II), was prepared by the reaction of (Z)-3-(benzo[b]thiophen-3-yl)-2-(3,4,5-trimethoxyphenyl)acrylonitrile with tributyltin azide. Crystals of (I) have two molecules in t

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30

El-Aal, Hassan A. K. Abd, and Ali A. Khalaf. "Friedel–Crafts Chemistry. Part 39. Unprecedented Facile Route to the Synthesis of Benzo[b][1]benzazepines via Intramolecular Friedel–Crafts Cyclialkylations." Australian Journal of Chemistry 66, no. 6 (2013): 635. http://dx.doi.org/10.1071/ch12548.

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A series of six pharmaceutically promising 5,6-dihydro-11H-benzo[b][1]benzazepine derivatives (1c–h) were cleanly prepared by Friedel–Crafts cyclialkylations of nitrogen-containing alkanols in the presence of AlCl3, 85 % H2SO4 or polyphosphoric acid catalysts. The precursor alkanols (13a–f) were readily prepared by reaction of two synthesized carboxylic acid esters (12a, b) with different Grignard reagents. Also, two dibenzo[b,f]azepinones (15a, b) were prepared by Friedel–Crafts cycliacylation and reduced to the corresponding 5,6-dihydro-11H-benzo[b][1]benzazepines (1a, b). Overall, this appr

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31

Ravikumar, Krishnan, Balasubramanian Sridhar, Venkatasubramanian Hariharakrishnan, and Awadesh Narain Singh. "Three novel benzothiazine-fused triazoles as potential centrally acting muscle relaxants." Acta Crystallographica Section C Crystal Structure Communications 68, no. 11 (2012): o475—o480. http://dx.doi.org/10.1107/s0108270112040759.

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The structures of the novel triazolobenzothiazines 2,4-dihydro-1H-benzo[b][1,2,4]triazolo[4,3-d][1,4]thiazin-1-one (IDPH-791), C9H7N3OS, (I), a potential muscle relaxant, its benzoyl derivative, 2-(2-oxo-2-phenylethyl)-2,4-dihydro-1H-benzo[b][1,2,4]triazolo[4,3-d][1,4]thiazin-1-one, C20H17N3O4S, (II), and the β-keto ester derivative, ethyl 3-oxo-2-(1-oxo-2,4-dihydro-1H-benzo[b][1,2,4]triazolo[4,3-d][1,4]thiazin-2-yl)-3-phenylpropanoate, C17H13N3O2S, (III), are the first examples of benzothiazine-fused triazoles in the crystallographic literature. The heterocyclic thiazine rings in all three st

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32

Si, Peng, Jialei Liu, Guowei Deng та ін. "Novel electro-optic chromophores based on substituted benzo[1,2-b:4,5-b′]dithiophene π-conjugated bridges". RSC Adv. 4, № 49 (2014): 25532–39. http://dx.doi.org/10.1039/c4ra01767f.

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33

Chiasson, Audrey Isabel, Samuel Robichaud, Fanta J. Ndongou Moutombi, et al. "New Zileuton-Hydroxycinnamic Acid Hybrids: Synthesis and Structure-Activity Relationship towards 5-Lipoxygenase Inhibition." Molecules 25, no. 20 (2020): 4686. http://dx.doi.org/10.3390/molecules25204686.

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A novel series of zileuton-hydroxycinnamic acid hybrids were synthesized and screened as 5-lipoxygenase (5-LO) inhibitors in stimulated HEK293 cells and polymorphonuclear leukocytes (PMNL). Zileuton’s (1) benzo[b]thiophene and hydroxyurea subunits combined with hydroxycinnamic acid esters’ ester linkage and phenolic acid moieties were investigated. Compound 28, bearing zileuton’s (1) benzo[b]thiophene and sinapic acid phenethyl ester’s (2) α,β-unsaturated phenolic acid moiety 28, was shown to be equipotent to zileuton (1), the only clinically approved 5-LO inhibitor, in stimulated HEK293 cells

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34

Bhaskar, J. Udaya, G. Srinivasa Rao, Pranab Chatterjee, D. K. Sahoo, S. Srinivasa Rao, and B. Pulla Rao. "Synthesis, Characterization and Antibacterial Screening of Some Novel Compounds containing Multi N-Fused Heterocycles." Asian Journal of Chemistry 36, no. 9 (2024): 2185–90. http://dx.doi.org/10.14233/ajchem.2024.32265.

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An attempt has been made to synthesize novel multi N-fused heterocyclic compounds containing four divergent heterocyclic compounds such as imidazole, pyrimidine, morpholine and indole. A series of N-(4-(1H-benzo[d]imidazol-2-yl)-6-phenylpyrimidin-2-yl)-2-(4-((E)-3-(2-morpholino-9H-pyrido[2,3-b]indol-3-yl)acryloyl)phenylamino)acetamide (6a-c) was accomplished in good yields with 1-(1H-benzo-[d]imidazol-2-yl)ethanone (1) as starting compound and through the formation of (E)-1-(1H-benzo[d]imidazol-2-yl)-3-phenylprop-2-ne-1-ones (2a-c), 4-(1H-benzo[d]imidazol-2-yl)-6-phenylpyrimidin-2-amines (3a-c

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35

Zhou, Rong, Yanli Ding, and Mili Yang. "Synthesis of 2-Substituted Benzo[b]furans/furo-Pyridines Catalyzed by NiCl2." Catalysts 9, no. 12 (2019): 1019. http://dx.doi.org/10.3390/catal9121019.

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The first Ni-catalyzed tandem synthesis of 2-substituted benzo[b]furans/furo-pyridines from 2-halophenols and 1-alkynes was explored under Cu-free and phosphine-free conditions. The protocol was carried out with NiCl2/5-nitro-1, 10-phenanthroline in DMA (N,N-dimethylacetamide) at 120 °C. It was found to be simple, cost effective, and have a wide substrate scope. Additionally, the method is compatible with heteroaryl substrates, resulting in the formation of 2-substituted benzo[b]furans/furo-pyridines in reasonable to good yields.

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36

Cross, Peter E., Roger P. Dickinson, M. John Parry, and Michael J. Randall. "Selective thromboxane synthetase inhibitors. 4. 2-(1H-Imidazol-1-ylmethyl)benzo[b]furan-, -benzo[b]thiophene-, -indole- and -naphthalenecarboxylic acids." Journal of Medicinal Chemistry 29, no. 9 (1986): 1643–50. http://dx.doi.org/10.1021/jm00159a013.

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37

Miao, Kai, Mao Liang, Zhihui Wang, Chunyao Zhang, Zhe Sun, and Song Xue. "Organic sensitizers featuring thiophene derivative based donors with improved stability and photovoltaic performance." Physical Chemistry Chemical Physics 19, no. 3 (2017): 1927–36. http://dx.doi.org/10.1039/c6cp07335b.

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Thiophene derivatives, including thieno[3,2-b][1]benzothiophene (TBT), benzo[b]thiophene (BT), 2-phenylthieno[3,2-b]thiophene (PTT) and 2-phenylthiophene (PT), have been introduced as donor for construction triarylamine organic dyes.

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38

Sonar, Vijayakumar N., Sean Parkin, and Peter A. Crooks. "4-(Benzo[b]thiophen-3-yl)-1-methylpiperidine-4-carbonitrile." Acta Crystallographica Section E Structure Reports Online 60, no. 9 (2004): o1533—o1534. http://dx.doi.org/10.1107/s1600536804019543.

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39

Moloney, Gerard. "3-Chloro-5-methoxy-1-benzo[b]thiophene-2-sulphonamide." Molecules 5, no. 12 (2000): M174. http://dx.doi.org/10.3390/m174.

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40

Lakshmi, Palla Sai, and Puligilla Shankaraiah. "Synthesis of (E)-2-Benzylidene-N-(3-(3-oxo-2,3-dihydro-4Hbenzo[ b][1,4]oxazin-4-yl)propyl)hydrazine-1-carbothioamides." Asian Journal of Chemistry 35, no. 7 (2023): 1575–78. http://dx.doi.org/10.14233/ajchem.2023.27601.

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A series of novel substituted-(E)-2-benzylidene-N-(3-(3-oxo-2,3-dihydro-4H-benzo[b][1,4]oxazin-4- yl)propyl)hydrazine-1-carbothioamides (9a-j) was synthesized in satisfactory to excellent yield by reacting (Z)-N′-benzylidene hydrazine carbothioamides (8a-j) with 4-(3-bromo-propyl)-2H-benzo[b][1,4]oxazin- 3(4H)-one (5) in K2CO3 and dry N,N-dimethyl formamide. The novel carbothioamides (9a-j) structures were confirmed using 1H NMR, IR and mass spectroscopic methods

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41

Elagamey, Abdel Ghani A., Salah Z. Sawllim, Fathy M. A. El-Taweel, and Mohamed H. Elnagdi. "Nitriles in heterocyclic synthesis: Novel syntheses of benzo[b]pyrans, naphtho[1,2-b]pyrans, naphtho[2,1-b]pyrans, pyrano[3,2-h]quinolines and pyrano[3,2-c]quinolines." Collection of Czechoslovak Chemical Communications 53, no. 7 (1988): 1534–38. http://dx.doi.org/10.1135/cccc19881534.

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Benzo[b]pyrans, naphtho[1,2-b]pyrans, naphtho[2,1-b]pyrans, pyrano[3,2-h]quinolines, and pyrano[3,2-c]quinolines were synthesized by the reaction of cinnamonitriles with phenols, naphthols, 8-hydroxyquinoline, and 1-methyl-4-hydroxy-2-quinoline.

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42

Y., Dominic Ravichandran, Kishor Rachna, Hariharasubramanian A., Mohana Priya K., and S. Khora Samanta. "Synthesis and characterization of N-substituted benzimidazole derivatives and study of their antibacterial and antifungal activity." Journal of Indian Chemical Society Vol. 92, Jun 2015 (2015): 915–17. https://doi.org/10.5281/zenodo.5637656.

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Organic Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014, Tamilnadu, India <em>E-mail </em>: dominic.y@vit.ac.in Medical Biotechnology Division, School of Bioscience and Technology, VIT University, Vellore-632 014, Tamilnadu, India N-(4-(1<em>H</em>-Benzo[d]imidazol-1-yl)phenyl)-3-nitrobenzamide, N-(4-(1<em>H</em>-benzo[d]imidazol-1-yl)phenyl)-4- chlorobenzamide, 4-(1<em>H</em>-benzo[d]imidazol-1-yl)benzenamine and N-(4-(1<em>H</em>-benzo[<em>d</em>]imidazol-1-yl)phenyl)-4-bromobenzamide were synthesized and characterized by IR and NMR techniques. These N-substi

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43

Samatha, Garrepalli. "Anti-Inflammatory Activity: Assessment of Benzo [6, 7] Cyclohepta [1, 2-b] Pyridine Derivatives." Psychology and Mental Health Care 1, no. 2 (2017): 01–03. http://dx.doi.org/10.31579/2637-8892/006.

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44

Zachara, Alicja, Dorota Gałkowska, and Lesław Juszczak. "Występowanie wielopierścieniowych węglowodorów aromatycznych w wybranych produktach zbożowych." Zywnosc Nauka Technologia Jakosc/Food Science Technology Quality 111, no. 2 (2017): 67–77. http://dx.doi.org/10.15193/zntj/2017/111/186.

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W pracy przedstawiono wyniki badań, których celem było określenie poziomu zanieczyszczenia różnych rodzajów produktów zbożowych związkami z grupy wielopierścieniowych węglowodorów aromatycznych (WWA), tj. benzo(a)pirenem oraz sumą benzo(a)pirenu, benzo(a)antracenu, benzo(b)fluorantenu i chryzenu. Zawartość tych związków w produktach przeznaczonych dla niemowląt i małych dzieci jest limitowana przez Rozporządzenie Komisji (UE) 2015/1125. Materiał badany stanowiły dostępne handlowo płatki zbożowe, kasze, chleby, pieczywo chrupkie oraz musli, a także produkty dla niemowląt i dzieci: kaszki zbożow

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45

Girgis, Adel S., and I. S. Ahmed-Farag. "Synthesis of Novel 2-Alkoxy-5H-benzo[6,7]cyclohepta[1,2-b]pyridine-3-carbonitriles." Zeitschrift für Naturforschung B 58, no. 7 (2003): 698–703. http://dx.doi.org/10.1515/znb-2003-0716.

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Reaction of 6-arylmethylene-6,7,8,9-tetrahydro-5H-benzocyclo-hepten-5-ones (1) with malononitrile in the appropriate alcohol in the presence of sodium afforded the corresponding 2-alkoxy-4-aryl- 6,7-dihydro-5H-benzo[6,7]cyclohepta[1,2-b]pyridine-3-carbonitriles (2) and not their isomeric forms 2-alkoxy-4-aryl-6,7-dihydro-5H-benzo[3,4]-cyclohepta[1,2-c]pyridine-1-carbonitriles (3). The proposed structure was confirmed via independent synthesis of (2) through the reaction of 6,7,8,9- tetrahydro-5-benzocycloheptenone (4) with the appropriate ylidenemalononitriles 5 under the same reaction conditi

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46

Khojasteh-Khosro, Sheida, and Hossein Shahbazi-Alavi. "Preparation of spirooxindoles catalyzed by nano-Co3S4 under microwave irradiations." Journal of Chemical Research 43, no. 3-4 (2019): 107–11. http://dx.doi.org/10.1177/1747519819841791.

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An efficient and rapid method is used for the synthesis of 10-methyl-8 H-spiro[benzo[5,6]chromeno[2,3- c]pyrazole-11,3′-indol]-2′(1′ H)-one and 8-methyl-10-phenyl-10,11-dihydrospiro[pyrazolo[3,4- b]benzo[ h]quinolin-7,3′-indol]-2′(1′ H)-one by a four-component reactions of phenylhydrazine or hydrazine hydrate, isatins, ketoesters, and naphthylamine or 2-naphthol using nano-Co3S4 under microwave irradiation.

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47

Khattab, Samah A., Wafaa F. Hussien, Nermin Raafat, and Eman Ahmed Alaa El-Din. "Modulatory effects of catechin hydrate on benzo[a]pyrene-induced nephrotoxicity in adult male albino rats." Toxicology Research 10, no. 3 (2021): 542–50. http://dx.doi.org/10.1093/toxres/tfab029.

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Abstract Benzo [a] pyrene (B[a]P) is a potent mutagen and carcinogen, considered one of the commonest concomitants in the environment. The study aimed to evaluate the effect of catechin hydrate on benzo pyrene-induced kidney toxicity. Thirty-six adult male albino rats were divided into six groups: group I untreated control, group II received 10 mL/kg of corn oil (solvent of benzo [a] pyrene) twice a week, group III received 1 mL/kg 0.5% dimethyl sulfoxide (DMSO) (solvent of catechin) once per day, group IV received 50 mg/kg body weight of benzo[a]pyrene twice a week, group V received 20 mg/kg

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48

Kim, Yeongju, and Sung-Gon Kim. "2-((3R,9bS)-5,5-Dioxido-2,3-dihydro-9bH-benzo[4,5]isothiazolo[3,2-b]oxazol-3-yl)-1-phenylethan-1-one." Molbank 2024, no. 4 (2024): M1931. https://doi.org/10.3390/m1931.

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A highly efficient method has been developed for preparing 2-((3R,9bS)-5,5-dioxido-2,3-dihydro-9bH-benzo[4,5]isothiazolo[3,2-b]oxazol-3-yl)-1-phenylethan-1-one. This enantioenriched title compound was obtained via an organocatalytic asymmetric [3+2]-cycloaddition of benzo[d]isothiazole 1,1-dioxide with (E)-4-hydroxy-1-phenylbut-2-en-1-one, using a bifunctional squaramide-based chiral catalyst. The reaction yielded 99% of the product with high enantioselectivity and diastereoselectivity (89:11 er and >20:1 dr). The structure of the newly synthesized compound was confirmed by 1H-, 13C-NMR, IR

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49

Aesha F SH Abdassalam, Aesha F. SH Abdassalam, Semih Kurban Semih Kurban, and Nahide Gulsah Deniz and Cigdem Sayil Nahide Gulsah Deniz and Cigdem Sayil. "Synthesis and Characterization of New Naphtho- and Tetracyclic Diazaquinone Derivatives." Journal of the chemical society of pakistan 41, no. 5 (2019): 834. http://dx.doi.org/10.52568/000805/jcsp/41.05.2019.

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In this study, new 1,4-naphtho- and 5-nitro-1,4-naphtho derivatives containing N- and N,N-substituted groups which has not been reported yet, have been synthesized from 2,3-dichloronaphthalene-1,4-diones (1,9). Compounds of 2-choloro-3-((2,4,6-triflorophenyl)amino)naphthalene-1,4-dione (3) and 2-chloro-3-((4-florophenyl)amino)naphtalene-1,4-dione (7) were obtained by reactions of 2,3-dichloronaphthalene-1,4-dione 1 with 4-fluoroaniline (6) and 2,4,6-trifloroaniline (2), respectively involving a Michael addition. We reported the cyclization reactions of compounds 1 to benzo[g]pirido[3,2-b]quino

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50

Qiu, Youai, Dengke Ma, Chunling Fu, and Shengming Ma. "General approach to benzo[b]thiophenes, benzo[b]furans, and dibenzofurans via gold-catalyzed cyclization of 1-heteroarylalka-2,3-dienyl acetates." Tetrahedron 69, no. 30 (2013): 6305–12. http://dx.doi.org/10.1016/j.tet.2013.04.099.

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