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Journal articles on the topic 'IR and 1H NMR spectra'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Huda ahmed younis and Raheem Jameel Mahesein. "Synthesis and characterization A derivative of levofloxacin and a study of its bacteriostatic activity." Journal of Kufa for Chemical Sciences 3, no. 1 (2023): 97–125. http://dx.doi.org/10.36329/jkcm/2023/v3.i1.11699.

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This study includes two newly synthesized prodrugs of Levofloxacin derivatives mono and dipeptide H2, where was the Synthesized monoPeptide as Levofloxacin-Histadine (L-H), as well as dipeptide H6 as Synthesis of diPeptide (phenylalanine- levofloxacin (GPA-L), using a Levofloxacin substituted. Spectroscopic data were studied for two derivative compounds H2 and H6 and reactivity indices were characterized using techniques FT-IR, 1H-NMR, and 13C-NMR. All the newly produced derivative compounds H2 and H6 have FT-IR spectra that share similarities in certain fingerprint-like bands and other bands.

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2

Aleskerova, A., I. Jahangirova, E. Kerimli, and S. Serkerov. "Study of Artemisia kobstanica Sesquiterpene Lactones." Bulletin of Science and Practice, no. 10 (October 15, 2022): 47–53. http://dx.doi.org/10.33619/2414-2948/83/05.

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Sesquiterpene lactones of wormwood Artemisia kobstanica Rzazade from the flora of Azerbaijan were studied for the first time. Three sesquiterpene lactones, C15H18O3, m. p. 171–172 °C (1), C15H20O4, m. p. 124–126 °C (2), C15H18O4, m. p. 202–203 °C (3). Based on physicochemical and spectral (IR and 1H NMR spectra) data, lactones 1 and 3 were identified with α-santonin and artemisinin, respectively. Substance 2 turned out to be new, for the first time isolated from the studied species of wormwood by merezolid. Based on the data obtained from the interpretation of IR and 1H NMR spectra, the struct

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3

Jurášek, Adolf, Viktor Badory, Vladimír Žvak, and Jarmila Štetinová. "Synthesis and properties of 2,5-dimethyl-3-furoylthioureas." Collection of Czechoslovak Chemical Communications 56, no. 8 (1991): 1711–18. http://dx.doi.org/10.1135/cccc19911711.

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Addition of a series of aromatic or aliphatic amines to 2,5-dimethyl-3-furoyl isothiocyanate (I) afforded the corresponding N-(2,5-dimethyl-3-furoyl)-N’-aryl- or alkylthioureas II or III. Spectral data (IR, UV, 1H NMR, 13C NMR and mass spectra) of compounds prepared are presented.

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4

Astuti, Maria Dewi, Lathifah Fauzi, and Kamilia Mustikasari. "Isolation and Characterization of Compounds from Cinnamon Oil (Cinnamomum burmanii) Distillation Residu." Jurnal Sains dan Terapan Kimia 16, no. 1 (2022): 9. http://dx.doi.org/10.20527/jstk.v16i1.12160.

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This study aimed to isolate and characterize compounds from the distillation residue of cinnamon oil from Loksado, South Kalimantan. Cinnamon (Cinnamomum burmanii) distillation residue was extracted with methanol as solvent. The methanol extract was fractionated by liquid vacuum chromatography to obtain fractions A, B, C, and D. The crystals contained in fraction C were washed with cold n-hexane to obtain 5.4 mg of yellow isolate (FC1). FC1 isolates were characterized by UV-Vis, IR, 1H-NMR, and 13C-NMR spectrophotometers. UV spectra showed a maximum wavelength at 307, 316, and 321 nm indicatin

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5

Jaiswal, Amit, Anil Kumar Pal, Dharmendra Kumar Sahu, and Ranjeet Kumar. "Synthesis and characterizations of Hg (II) Complex of Macrocyclic complexes compounds Tetradecahydrodibenzo hexaazacyclooctadecine with HgX2 (X= Cl, Br) by Hirshfeld analysis and antimicrobial activity." Journal of Drug Delivery and Therapeutics 14, no. 3 (2024): 115–21. http://dx.doi.org/10.22270/jddt.v14i3.6476.

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This study examines the synthesis and characterization of a macrocyclic complex molecule having the general formula [M-LX2], where M =Hg (II) with schiff base Tetradecahydrodibenzo hexaazacyclooctadecine ligands. Resulted from the interaction between mercury and the diethyl triamine and benzene- 1, 2 diol in an ethanolic solution. Schiff base and its novel mercury (II) Complexes were studied vibrational in the solid state using spectral, 1H-NMR, IR, UV, and antimicrobial activity approaches. We were able to establish the coordination mode of the metal in complexes by comparing the changes in t

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6

Bobáľ, Pavel, Roman Gažo, Rudolf Kada, Dušan Ilavský, Naďa Prónayová, and Lubomír Zalibera. "Condensation Reactions of 1,2,3,4-Tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinecarbaldehyde." Collection of Czechoslovak Chemical Communications 60, no. 4 (1995): 605–11. http://dx.doi.org/10.1135/cccc19950605.

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Condensation reactions of 1,2,3,4-tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinecarbaldehyde with nine acid derivatives containing an active methylene group are described. The obtained products were characterized by their IR, UV, 1H NMR, 13C NMR and mass spectra. The stereochemistry of selected products was studied by 1H and 13C NMR spectroscopy.

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7

Thirunarayanan, Ganesamoorthy. "IR and NMR Spectral Studies of Some 4-(6-methoxy-2-naphthyl)-5,6-dihydro-6-(Substituted Phenyl)-⁴H-1,3-Oxazine-2-Amines: Assessment of Substituent." International Letters of Chemistry, Physics and Astronomy 23 (November 2013): 109–16. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.23.109.

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A series containing thirteen title compounds were synthesized and recorded IR and NMR spectra. The infrared νNH, C=N(cm-1)stretches, 1H NMR δNH, 13C NMR δC=N(ppm) chemical shifts of synthesized oxazine amines were assigned and correlated with Hammett substituent constants, F and R parameters. From the results of statistical analyses, the effect of substituents on the above spectral frequencies can be discussed.

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8

Thirunarayanan, Ganesamoorthy. "IR and NMR Spectral Studies of Some 4-(6-methoxy-2-naphthyl)-5,6-dihydro-6-(Substituted Phenyl)-<sup>4</sup><i>H</i>-1,3-Oxazine-2-Amines: Assessment of Substituent." International Letters of Chemistry, Physics and Astronomy 23 (November 30, 2013): 109–16. http://dx.doi.org/10.56431/p-h1w2ik.

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A series containing thirteen title compounds were synthesized and recorded IR and NMR spectra. The infrared νNH, C=N(cm-1)stretches, 1H NMR δNH, 13C NMR δC=N(ppm) chemical shifts of synthesized oxazine amines were assigned and correlated with Hammett substituent constants, F and R parameters. From the results of statistical analyses, the effect of substituents on the above spectral frequencies can be discussed.

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9

Şen, Fatih. "Structure determination, vibrational bands and chemical shift assignments of 3-(4-(3-(2,5-dimethylphenyl)-3-methylcyclobutyl)thiazol-2-yl)-2-(o-tolyl)thiazolidin-4-one: A combined experimental and quantum chemical density-functional theory studies." Macedonian Journal of Chemistry and Chemical Engineering 38, no. 2 (2019): 183. http://dx.doi.org/10.20450/mjcce.2019.1679.

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This paper report is an analysis of the title compound by means of X-ray crystallography, FT-IR, NMR and DFT calculations, in the context of structural and spectral characterization. The crystal and molecular structures of the compound were determined by single-crystal X-ray diffraction (SCXRD). Fourier Transform Infrared (FTIR) spectrum was recorded in the range from 400 cm–1 to 4000 cm–1. The 1H and 13C nuclear magnetic resonance (NMR) spectra were also recorded. DFT calculations were employed to support X-ray molecular geometry and calculate IR and NMR (1H and 13C) spectral bands. The struc

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10

Ilyas, Mohammad, Mehtab Perveen, Shafiullah, and Syed Mohmud Ahmad. "A Novel Chalcone from Garcinia Nervosa." Journal of Chemical Research 2002, no. 5 (2002): 231–33. http://dx.doi.org/10.3184/030823402103171799.

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A novel chalcone 5′-bromo-2′-hydroxy-4,4′,6′-trimethoxy-chalcone, isoliquiritigenin-4,4′-dimethyl ether (2′-hydroxy-4,4′-dimethoxy chalcone) and 2′-hydroxy-3,4,4′,6′-tetramethoxy dihydrochalcone have been isolated from the leaves of Garcinia nervosa. Their structure have been elucidated on the basis of chemical and spectral evidences (1H NMR, 13C NMR, HMQC, NOE, IR, UV and mass spectra).

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11

Drabińska, Beata, Katarzyna Dettlaff, Tomasz Ratajczak, et al. "Structural and Spectroscopic Properties of Isoconazole and Bifonazole—Experimental and Theoretical Studies." International Journal of Molecular Sciences 24, no. 1 (2022): 520. http://dx.doi.org/10.3390/ijms24010520.

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The paper compares the experimental FT-IR, UV-vis, and 1H NMR spectra of isoconazole and bifonazole with the density functional theory (DFT) calculations using different functionals. The results were compared with previously reported data related to their analogue, posaconazole. The analysis of calculated IR spectra with use of CAM-B3LYP (isoconazole) or B3LYP (bifonazole) functionals shows good accordance with the experimental IR spectrum. The best compatibility between the experimental and theoretical UV spectra was observed with the use of B3LYP or wB97XD functionals for isoconazole or bifo

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12

Thakar, A. S., K. K. Singh, K. T. Joshi, A. M. Pancholi, and K. S. Pandya. "Synthesis, Characterization and Antibacterial Activity of Schiff Bases and their Metal Complexes Derived from 4-Acyl-1-phenyl-3-methyl-2-pyrazolin-5-ones and 2-Amino-4(4'-methylphenyl)-thiazole." E-Journal of Chemistry 7, no. 4 (2010): 1396–406. http://dx.doi.org/10.1155/2010/163264.

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4-Acyl-1-phenyl-3-methyl-2-pyrazolin-5-ones condensed with 2-amino-4(4'-methylphenyl)-thiazole to form Schiff base. These Schiff bases from complexes of type ML22H2O (M=Mn, Fe, Co, Ni and Cu). Elemental analysis, magnetic susceptibility, electrical conductance, electronic and Infrared spectral data suggested octahedral structure for the complexes. All the compounds were tested for their antibacterial activity. The result indicates that the growth of the tested organism was inhibited by most of the compounds. These Schiff bases are characterized by elemental analysis, mass spectra,1H-NMR spectr

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13

R., Rajalakshmi, and Elakiya T. "Effect of substituents on infrared, H1 and C13NMR spectra of Schiff's bases derived from Furfuryl amine." International Journal of Trend in Scientific Research and Development 2, no. 2 (2018): 550–54. https://doi.org/10.31142/ijtsrd8380.

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Several substituted Schiff,s bases have been derived from furfuryl amine and their IR, 1H and 13C NMR spectra are recorded. The IR C=N cm 1 , NMR d ppm of CH=N spectral data have been correlated with Hammett substituent constants and Swain Lupton's parameters using single and multi linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral data has been studied. R. Rajalakshmi | T. Elakiya "Effect of substituents on infrared, H1 and C13NMR spectra of Schiff's bases derived from Furfuryl amine" Published in Internatio

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14

Bhandari, Namratha, and Santosh L. Gaonkar. "Synthesis and Antimicrobial Screening of Novel 4-Substituted Phenyl-5-[1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-yl]-2H-1,2,4-triazole-3-thiones." International Scholarly Research Notices 2014 (November 20, 2014): 1–7. http://dx.doi.org/10.1155/2014/439243.

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The paper describes a convenient method for the preparation of 4-substituted phenyl-5-[1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-yl]-2H-1,2,4-triazole-3-thiones. The structures of the synthesized compounds are established by the results of LCMS, 1H NMR, 13C NMR, and IR and elemental analyses. The mercaptotriazoles are indicated to be in thione form by 1H NMR spectra. All the synthesized compounds have been screened for antibacterial and antifungal activities. Compounds 12d and 12h exhibit encouraging results, while the remaining compounds show moderate activities. On the basis of spectral

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15

Abeed, Ahmed A. O., Talaat I. El-Emary, and Mohamed S. K. Youssef. "A Facile Synthesis and Reactions of Some Novel Pyrazole-based Heterocycles." Current Organic Synthesis 16, no. 3 (2019): 405–12. http://dx.doi.org/10.2174/1570179416666181210160908.

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<p>Aim and Objective: This work presents the synthetic capability and the exploitation of 1,3-diphenyl- 1H-pyrazole-4-carboxladehyde 1 and 5-diphenyl pyrazolyl-2-pyrazoline analogue 8 to serve as excellent precursors for the synthesis of substituted indol-2,3-dione, trizolo[3,4-a]benzazoles, thiazolo[2,3- a]benzimidazole-3-one, substituted 2-pyrazoline and pyrazole-substituted-pyrazolines using various reagents. </P><P> Materials and Methods: Using chemicals from Aldrich, Fluka, or Merck, and pure solvents, we apply the synthetic procedures for the synthesis of novel heterocy

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16

Srivastva, Abhay Nanda, Sayanwita Panja, Netra Pal Singh, and Chandra Kiran Shriwastaw. "Bioactive Metal Complexes of Schiff Base Derived from 2,3-Dioxobutane, Ethane-1,2-diamine and 4-Chloro-2-formylphenol: Spectral Studies and in vitro Antimicrobial Activity." Asian Journal of Chemistry 33, no. 12 (2021): 3063–69. http://dx.doi.org/10.14233/ajchem.2021.23478.

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A novel series of trivalent coordination complexes was synthesized by the reaction between a chloride/ acetate salt of iron, chromium, cobalt or manganese ions and NNNNOO type persuasive Schiff base ligand synthesized from 2,3-dioxobutane, ethane-1,2-diamine and 4-chloro-2-formylphenol. Synthesized compounds were characterized by using elemental analysis, molar conductance, magnetic moment, IR, UV-visible, 1H NMR, 13C NMR and ESI-MS spectral analyses. IR and NMR spectra favoured hexadentate coordination behaviour of ligand. Electronic spectra and magnetic moment data reveal Oh geometry with di

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17

Astuti, Maria Dewi, Tuti Sriwinarti, and Kamilia Mustikasari. "ISOLATION AND IDENTIFICATION OF TERPENOID COMPOUNDS FROM n-HEXANA EXTRACT OF PERMOT PLANT BRACTS (Passiflora foetida L)." Jurnal Sains dan Terapan Kimia 11, no. 2 (2017): 80. http://dx.doi.org/10.20527/jstk.v11i2.4041.

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Isolation and identification of terpenoids compounds from n-hexane extract of permot bracts plants (Passiflora foetida L.) has been done. Crude powder of the bracts permot plants were macerated with n-hexane. Fractionated of n-hexane extract on a vacuum liquid chromatography to afford three fractions (A, B and C). Purification of fraction B with TLC preparative to afford isolate B1 and B2.. A compound of spectra UV-Vis B1 indicating the presence of conjugation of double bond (C=C), furthermore the IR spectra showed vibration for - OH group, C=O of the ester group, C-O group, and methyl group (

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18

Shaker, Raafat M., Kamal U. Sadek, Ebtisam A. Hafez, and Mohamed Abd Elrady. "5-Aminouracil as a Building Block in Heterocyclic Synthesis: Part IV. One-pot Synthesis of 1H-Pyrrolo[2,3-d]pyrimidine-2,4(3H,7H)-dione Derivatives Using Controlled Microwave Heating." Zeitschrift für Naturforschung B 66, no. 8 (2011): 843–49. http://dx.doi.org/10.1515/znb-2011-0810.

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An efficient and direct procedure for the synthesis of pyrrolo[2,3-d]pyrimidine-2,4-dione derivatives using controlled microwave heating has been described. The products were characterized by elemental analyses, IR, 1H NMR, 13C NMR and MS spectra.

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19

Ikizler, Aykut A., and Kemal Sancak. "Reaction of Ester Ethoxycarbonylhydrazones with Aliphatic Diamines." Collection of Czechoslovak Chemical Communications 60, no. 5 (1995): 903–9. http://dx.doi.org/10.1135/cccc19950903.

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Reaction of esters of (N-ethoxycarbonyl)alkanehydrazonic acids with aliphatic diamines were prepared α,ω-bis(3-alkyl-4,5-dihydro-1H -1,2,4-triazol-5- one-4-yl)alkanes. All compounds were characterized by elemental analyses, IR and 1H NMR spectra.

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20

Shaker, Raafat M., Kamal U. Sadek, Ebtisam A. Hafez, and Mohamed Abd Elrady. "5-Aminouracil as a Building Block in Heterocyclic Synthesis: Part III. One-pot Synthesis of Novel Pyrimido[5,4-b]quinoline-2,4,9-triones and Pyrimido[5,4-c]isoquinolines." Zeitschrift für Naturforschung B 65, no. 12 (2010): 1485–90. http://dx.doi.org/10.1515/znb-2010-1212.

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An efficient and direct procedure for the synthesis of pyrimido[5,4-b]quinoline-2,4,9-trione and pyrimido[5,4-c]isoquinoline derivatives has been described. The products were characterized by elemental analyses, IR, 1H NMR, 13C NMR and MS spectra.

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21

Chirkova, Zhanna V., Sergey I. Filimonov, and Igor G. Abramov. "SYNTHESIS OF BENZOFURAN-5,6-DICARBONITRILES ANNELATED WITH PYRAZOLE CYCLE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 6 (2017): 45. http://dx.doi.org/10.6060/tcct.2017606.5576.

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The principal method for the preparation of substituted 4-formyl-1H-pyrazoles was the treatment of hydrazones of different structure with Vilsmeier-Haack reagent. However, for the heterocyclic benzofuran system this reaction is rarely used. Synthetic methods for preparation of novel substituted 3-(4-fomyl-1H-pyrazole-3-yl)-2-methylbenzofuran-5,6-dicarbonitriles and 2-(1H-pyrazole-4-yl)-benzofuran-5,6-dicarbonitriles were developed by modification of 2,3-disubstituted benzofuran-5,6-dicarbonitriles via Vilsmeier-Haack reaction. New substituted 3-(4-fomyl-1H-pyrazole-3-yl)-2-methylbenzofuran-5,6

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22

Rahman, S. M. Mizanur, Shayla Pervin, Md Abdul Quader, and M. Amzad Hossain. "PHYTOCHEMICAL STUDIES OF THE PETROLEUM ETHER EXTRACT OF THE LEAVES OF Lagerstroemia speciosa Linn." Indonesian Journal of Chemistry 9, no. 3 (2010): 500–504. http://dx.doi.org/10.22146/ijc.21523.

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Two new compounds, normal alcohol containing of higher carbons and isomer of β-sitosterol were isolated for the first time from the petroleum extract of the leaves of Lagerstroemia speciosa. The structure of the compound has been established on the basis of UV, IR, 1H-NMR, 13C-NMR and mass spectra and identified as nonanol and isomer of β-sitosterol. Keywords: Lagerstroemia speciosa, petroleum ether extracts, isolation, 1-nonanol, 2 β-sitostero, spectral analyses.

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23

Milata, Viktor, Dušan Ilavský, Igor Goljer, and Ján Leško. "4-N-Benzazolylamino Derivatives of 3-Y-3-Buten-2-one." Collection of Czechoslovak Chemical Communications 57, no. 3 (1992): 531–39. http://dx.doi.org/10.1135/cccc19920531.

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Ethoxymethylene derivatives of 2,4-pentanedione (Ia), 3-oxobutanenitrile (Ib), methyl (Ic) or ethyl (Id) 3-oxobutanoate give with 4- or 5-aminobenzimidazole or benzotriazole, respectively, under mild conditions products of nucleophilic substitution II-V. Structure of these compounds was discussed on the basis of their spectral measurements - IR, UV, 1H, 13C NMR and mass spectra.

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24

Gutiérrez, M. D., R. López, M. A. Romero, and J. M. Salas. "Spectroscopic studies of some Pd(II), Pt(II), Ag(I), and Au(III) complexes of 4,6-diamino-2-thiopyrimidine and 4,6-diamino-2-methylthiopyrimidine. Structure and binding site determination." Canadian Journal of Chemistry 66, no. 2 (1988): 249–55. http://dx.doi.org/10.1139/v88-042.

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Interaction of Pd(II), Pt(II), Ag(I), and Au(III) with 4,6-diamino-2-thiopyrimidine (DATP) and 4,6-diamino-2-methyl-thiopyrimidine (DAMTP) in aqueous medium resulted in the formation of new complexes which have been characterized by elemental analysis, ir, 1H-nmr spectroscopic techniques, magnetic susceptibility measurements in the solid state, and conductivity measurements in DMF solution. The ir and 1H-nmr spectra were consistent with coordination involving the non-protonated ring nitrogen atom, the exocyclic sulphur atom, or N,S-chelation.

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25

Zhao, Li Hong, and Hong Jun Sun. "Comparative Study of Two Types of Alkali Lignin from Different Origin." Advanced Materials Research 299-300 (July 2011): 747–50. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.747.

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The physico-chemical characterization of two types of alkali lignin from different origin, namely L1 and L2, were studied by Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance spectrometry (1H NMR) and gel permeation chromatography (GPC) analysis. FT-IR spectra show that they have the characteristics of absorption peaks of syringyl and guaiacyl. 1H NMR spectra indicate that acetylated L1 exhibits higher content of aromatic protons than L2, as the former is mainly composed by G units. L2 presents high quantities of methoxyl groups. GPC results show that L1 has mu

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26

Piryaei, Forozan, Nahid Shajari, and Hooriye Yahyaei. "Efficient ZrO(NO3)2.2H2O Catalyzed Synthesis of 1H-Indazolo[1,2-b] phthalazine-1,6,11(13H)-triones and Electronic Properties Analyses, Vibrational Frequencies, NMR Chemical Shift Analysis, MEP: A DFT Study." Heteroatom Chemistry 2020 (March 1, 2020): 1–13. http://dx.doi.org/10.1155/2020/9483520.

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The synthesis of 1H-indazolo[1,2-b]phthalazine-1,6,11(13H)-trione derivatives, using one-pot three-component condensation reaction of 3-nitrophthalic anhydride, hydrazine monohydrate, dimedone, and aromatic aldehydes in the presence of ZrO(NO3)2.2H2O as the novel catalyst and in reflux conditions in EtOH was reported. Quantum theoretical calculations for three structures of compounds (5a, 5b, and 5c) were performed using the Hartree–Fock (HF) and density functional theory (DFT). From the optimized structure, geometric parameters were obtained and experimental measurements were compared with th

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27

Ma, M., and K. E. Johnson. "Some physicochemical characteristics of molten salts derived from trimethylsulfonium bromide." Canadian Journal of Chemistry 73, no. 4 (1995): 593–98. http://dx.doi.org/10.1139/v95-076.

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Ambient temperature melts were derived from trimethylsulfonium bromide (TMSuBr) and AlBr3, AlCl3, or HBr. The aluminum halide melts have low-wavelength UV cutoffs and single-band 1H NMR spectra. In the TMSuBr–HBr system, the formation of HBr2− and likely existence of H2Br3− are indicated by 1H NMR and IR spectra. Conductivity and viscosity data indicate stronger TMSu+–anion interactions than those between substituted imidazolium and halide anions. A Grotthus mechanism may operate for conduction in TMSuBr:HBr melts. Keywords: ambiant temperature melts, trimethylsulfonium–anion itneractions, Gro

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28

Tong, Yang, Xing-Wei Chen, Li-Hua He, Jing-Lin Chen, Sui-Jun Liu, and He-Rui Wen. "Reversible stimuli-responsive luminescence of bimetallic cuprous complexes based on NH-deprotonated 3-(2′-pyridyl)pyrazole." Journal of Materials Chemistry C 9, no. 46 (2021): 16664–71. http://dx.doi.org/10.1039/d1tc03864h.

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Reversible stimuli-responsive luminescence virtually stems from the breaking and rebuilding of various CH⋯O hydrogen bonds around ClO4−, as supported by single-crystal analysis, the 1H NMR spectra, and the PXRD and FT-IR spectra in various forms.

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29

Qiu, Fei, Lin Wei, and Chen Yi Lu. "Improve the Synthesis of (S)-1-benzyl-3-pyrrolidinol." Advanced Materials Research 396-398 (November 2011): 1244–47. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.1244.

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The synthesis of (S)-1-benzyl-3-pyrrolidinol is described. Starting from L-malic acid and benzylamine, we improved the synthesis of (S)-1-benzyl-3-hydroxypyrrolidine-2, 5-dione via melting reaction, without using any solvent. Followed by reduction with sodium borohydride-iodine in tetrahydrofuran, we synthesized the target compound. We used IR spectra to study the process of the reduction and modified the reaction conditions. It is the first time we reported (S)-1-benzyl-3-pyrrolidinol-borane which is the intermediate of the reduction with sodium borohydride-iodine system, and its spectral dat

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30

Shaker, Raafat M., Mohamed A. Ameen, Afaf M. Abdel Hameed та Mohamed Abd Elrady. "5-Aminouracil as a Building Block in Heterocyclic Synthesis, Part II. One-pot Synthesis of Pyrido[3,2-d:6,5-dʹ]dipyrimidines under Microwave Irradiation without Catalyst". Zeitschrift für Naturforschung B 64, № 10 (2009): 1193–98. http://dx.doi.org/10.1515/znb-2009-1013.

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An efficient and direct procedure for the synthesis of pyrido[3,2-d:6,5-dʹ]dipyrimidine derivatives under microwave-assisted conditions is been described. The structures of the products were characterized by elemental analyses, and their IR, 1H NMR, 13C NMR, and MS spectra.

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31

Veeravel C, Rajasekar K, Balasubramanian S, and Selvarani R. "Green Route Synthesis of Bio-active Cd(II) and Hg(II) Complexes With ‘N’ Donor Novel Schiff base and Oxalate ion." International Journal of Research in Pharmaceutical Sciences 12, no. 2 (2021): 1689–94. http://dx.doi.org/10.26452/ijrps.v12i2.4768.

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Green route synthesis of bio-active diamagnetic Cd(II) and Hg(II) complexes with Schiff base and oxalate ion were synthesized using water as a solvent and characterized by using electronic spectra (UV-visible), Fourier transforms infrared (FT-IR), 1H and 13C-NMR spectroscopy, mass spectra and physical characterization such as CHN analysis, metal estimation and molar conductivity. 1H- and 13C-NMR spectra of ligand complex compared with Schiff base. The complexes have the general formula of ML2X (M= Cd(II) & Hg(II), L-C15H13N, X-C2O4 ) confirmed based on the results of elemental analysis, me

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32

Engelhardt, Udo, Ursula Diefenbach, and Reinhard Damerius. "Cyclotriphosphazen-2-spiro-3′-cyclodiphosphadiazan und Cyclotriphosphazen-2-spiro-3′-cyclodiphosphadiazan-6′-spiro-2″-cyclotriphosphazen – Spiroverbindungen aus Cyclotriphosphazen und Cyclodiphosphadiazanen / Cyclotriphosphazene-2-spiro-3′-cyclodiphosphadiazane, Cyclotriphosphazene-2-spiro-3′-cyclodiphosphadiazane-6′-spiro-2″-cyclotriphosphazene – Spiro Compounds from Cyclotriphosphazene and Cyclodiphosphadiazanes." Zeitschrift für Naturforschung B 45, no. 4 (1990): 457–60. http://dx.doi.org/10.1515/znb-1990-0408.

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Hexachlorocyclotriphosphazene (Cl2P=N)3 reacts with hydrazine or dihydrazidophosphoric acid O-phenyl-ester in THF in the presence of triethylamine to give the spirocyclic title compounds. Constitutions are confirmed by MS, NMR and IR spectra. {1H}31P NMR spectra at 36.23 MHz are of higher order – ABCD and A2BB′A′2 – and can be simulated with the appropriate shifts and coupling constants.

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33

Mohammed, Hassan A., Shakhawan Beebany, and Umeed Ali. "Binuclear Malonohydrazide Dithiocarbamate Complexes of Ni(II), Pd(II) and Pt(II): Synthesis, Characterization, Antimicrobial Activity, and SEM Studies." Chemistry & Chemical Technology 18, no. 3 (2024): 331–41. http://dx.doi.org/10.23939/chcht18.03.331.

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Binuclear complexes have been prepared with formula [M2L2], where L is potassium 2,2'-malonylbis(hydrazine-1-carbodithioate), M is Ni(II), Pd(II), and Pt(II). Each complex has been characterized by elemental analysis (CHNS), UV-Visible, FT-IR spectra, proton and carbon nuclear magnetic resonance (1H NMR and 13C NMR) spectra, magnetic susceptibility, scanning electron microscopy (SEM), and molar conductivity.

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34

Štibrányi, Ladislav, Milena Peeva, Zdena Kozempelová, Ján Leško, and Jaroslav Kováč. "Reactions of methyl ester of 5-amino-2-furancarboxylic acid with ethyl esters of orthoacids." Collection of Czechoslovak Chemical Communications 51, no. 12 (1986): 2817–25. http://dx.doi.org/10.1135/cccc19862817.

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By the reaction of the title compound with ethyl esters of orthoformic, orthoacetic, orthocarbonic, and pyrocarbonic acids, respectively, formimidate II, acetimidate III, imidocarbonate IV and carbamides V were prepared. IR, UV spectra were measured and 1H NMR and mass spectra were interpreted.

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35

Xu, Rongfu, Ying Cai, Fumin Liao, and Jinbiao Liu. "2-[Difluoro(phenylselenyl)methyl]benzo-1,3-thiazole." Molbank 2022, no. 4 (2022): M1450. http://dx.doi.org/10.3390/m1450.

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This short note elaborates a concise protocol for the synthesis of 2-[difluoro(phenylselenyl)methyl]benzo-1,3-thiazole in two steps from the commercially available reagent 2-aminobenzenethiol. The structures of the synthesized compounds are confirmed by 1H-NMR, 13C-NMR and 19F-NMR spectroscopy, infrared (IR) spectra, and high-resolution mass spectrometry.

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36

Munir, Rubina, Noman Javid, Muhammad Zia-ur-Rehman, et al. "Synthesis of Novel N-Acylhydrazones and Their C-N/N-N Bond Conformational Characterization by NMR Spectroscopy." Molecules 26, no. 16 (2021): 4908. http://dx.doi.org/10.3390/molecules26164908.

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In this article, a synthesis of N’-(benzylidene)-2-(6-methyl-1H-pyrazolo[3,4-b]quinolin-1-yl)acetohydrazides and their structural interpretation by NMR experiments is described in an attempt to explain the duplication of some peaks in their 1H- and 13C-NMR spectra. Twenty new 6-methyl-1H-pyrazolo[3,4-b]quinoline substituted N-acylhydrazones 6(a–t) were synthesized from 2-chloro-6-methylquinoline-3-carbaldehyde (1) in four steps. 2-Chloro-6-methylquinoline-3-carbaldehyde (1) afforded 6-methyl-1H-pyrazolo[3,4-b]quinoline (2), which upon N-alkylation yielded 2-(6-methyl-1H-pyrazolo[3,4-b]quinolin

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37

Abou-Zied, Ashraf H., and Salema A. A. El-Mansory. "Synthesis of Pyrazolopyrazol Derivative via Reactions of Donor Compounds with 4-(2-Hydroxybenzylidene)-3-methyl-1H-pyrazol-5(4H)-one." Al-Mukhtar Journal of Sciences 29, no. 1 (2014): 30–39. http://dx.doi.org/10.54172/mjsc.v29i1.267.

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4-(2-hydroxybenzylidene)-3-methyl-1H-pyrazol-5(4H)-one 3 reacted with hydrazine, phenylhydrazine, semicarbazide, thiosemicarbazide, acylthiosemicarbazide and acetylthiosemicarbazide as donor compounds in ethanol in presence of acetic acid or sulphuric acid by reflux to form pyrazolopyrazole derivative s 4 to 9, Respectively. These products which have been characterized by FT-IR, 1H-NMR, 13C-NMR, mass spectra and elemental analysis have been produced in good yields.

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38

Aitken, R. Alan, David B. Cordes, Mhairi R. Kinahan, and Aidan P. McKay. "2,3-Dihydrobenzo[e][1,3]oxazin-4-one." Molbank 2024, no. 3 (2024): M1878. http://dx.doi.org/10.3390/m1878.

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The title compound and its hydroxymethyl precursor have been fully characterised for the first time. The IR spectra, fully assigned 1H and 13C NMR spectra, and X-ray structures are presented for both compounds. Both compounds form hydrogen-bonded dimers in the crystal structures.

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39

Fazylov, S. D., O. A. Nurkenov, A. E. Arinova, et al. "SYNTHESIS OF PROPERTIES N-METHYL-2-(PYRID-4-YL)-3,4-FULLEROPYRROLIDINE." SERIES CHEMISTRY AND TECHNOLOGY 2, no. 440 (2020): 62–68. http://dx.doi.org/10.32014/2020.2518-1491.24.

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The article is devoted to the reactions of [2+3] cycloaddition of pyridine-4-aldehyde to fullerene C60, as well as to the preparation of its water-soluble from of the resulting reaction product N-methyl-2-(pyrid-4-yl)-3,4-fulleropyrrolidine. A literature review of organic compounds containing the pyrrolidine cycle was carried out. It is noted that such compounds have a wide spectrum of biological activity and are part of many drugs of both natural and synthetic origin. In this regard, an interesting “pharmacophore” group is the pyridine cycle, which is part of about 5% of all known drugs. The

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40

Metwally, Mohamed Abbas, and M. A. Sofan. "Synthesis of Some New Pyrrolo Heterocycles of Pharmaceutical Interest from 1,4-Diphenylpyrrolidine-2,3,5-trione+." Zeitschrift für Naturforschung B 45, no. 3 (1990): 382–84. http://dx.doi.org/10.1515/znb-1990-0313.

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Continuing earlier studies designed to obtain derivatives of pharmacological interest, some novel compounds 2, 5, 6, 7 and 8 were prepared using 1,4-diphenylpyrrolidine-2,3,5-trione (1) and 1,2-phenylenediamines, o-aminophenol, 1,3-diphenylacetone and thiosemicarbazide, respectively. The hydrazino derivative (8) was obtained from 7 and hydrazine hydrate. Structural identification was obtained by 1H NMR, mass spectra and IR spectral data.

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41

Muhaisen, Hasan M. H., M. Ilyas, M. Mushfiq, Mehtab Parveen, and Omer A. Basudan. "Flavonoids from Acacia Tortilis." Journal of Chemical Research 2002, no. 6 (2002): 276–78. http://dx.doi.org/10.3184/030823402103171960.

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A novel isoflavone, 5,7-dihydroxy-4′- p-methyl benzyl isoflavone 1a, and three known flavonoids apigenin, luteolin and quercetin have been isolated from the leaves of Acacia tortilis. Their structures were elucidated by chemical and physical data (IR, UV, 1H-NMR, 13C-NMR and MS spectra).

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42

Křeček, Václav, Stanislav Hilgard, Miloš Buděšínský, and Alois Vystrčil. "E-Homolupane Derivatives Substituted in Position 17 and 22a. 1H NMR, 13C NMR and IR Spectra." Collection of Czechoslovak Chemical Communications 60, no. 4 (1995): 619–35. http://dx.doi.org/10.1135/cccc19950619.

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A series of derivatives with various oxygen functionalities in positions 17,22a or 19,20 was prepared from diene I and olefin XVI by addition and oxidation reactions. The structure of the obtained compounds was confirmed by 1H NMR, 13C NMR and IR spectroscopy. The kind of intramolecular association of the 17α-hydroxy group was studied in connection with modification of the side chain and substitution in position 22a. Complete assignment of the hydrogen signals and most of the coupling constants was accomplished using a combination of 1D and 2D NMR techniques. The 1H and 13C NMR spectra are dis

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43

Drabińska, Beata, Katarzyna Dettlaff, Kacper Kossakowski, et al. "Structural and spectroscopic properties of voriconazole and fluconazole – Experimental and theoretical studies." Open Chemistry 20, no. 1 (2022): 1575–90. http://dx.doi.org/10.1515/chem-2022-0253.

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Abstract The article compares the experimental Fourier transform-infrared, Ultraviolet-visible (UV-vis), and proton nuclear magnetic resonance (1H NMR) spectra of voriconazole and fluconazole with the density functional theory (DFT) calculations using five different functionals. The results were compared with previously reported data related to its analogue – posaconazole. The analysis of calculated infrared (IR) spectra with the use of PBE1PBE (voriconazole) or APF (fluconazole) functionals shows good accordance with the experimental IR spectrum. The best compatibility between the experimenta

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Sethi, Pooja, Rajshree Khare, Jyoti Sharma, Anjana Kumari, and Simrat Kaur. "Mechanochemical Synthesis, Characterization and Biological Exploration of Pyrimidinethione based ligands." Research Journal of Chemistry and Environment 26, no. 9 (2022): 12–20. http://dx.doi.org/10.25303/2609rjce12020.

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The mechanochemical synthesis of 1-(4-Nitro phenylamino)-4,4,6-trimethyl-3,4-dihydro pyrimidine-2-(1H)- thione (Hnppt) based ligand and its metal complexes with Cu(II), Co(II), Ni(II), Mn(II), Cd(II), Pd(II) has been achieved. The synthesized ligand and its coordination complexes were evaluated for antibacterial ability and DNA photocleavage potential by using plasmid DNA. Ligand(Hnppt) was prepared and then it was allowed to chelate with different transition metals in 1:2 metal ligand ratio. All the complexes were then characterized by IR, Mass, NMR, magnetic moment, electronic spectra like s

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45

Alkam, Heam Hadi. "Synthesis and Characterization of New Bidentate Schiff Base Ligand Type (NO) Donor Atoms Derived from Isatin and 3-Amino Benzoic Acid and Its Complexes with Co(II), Cu(II), Cd(II) and Hg(II) Ions." Ibn AL- Haitham Journal For Pure and Applied Science 30, no. 3 (2017): 158. http://dx.doi.org/10.30526/30.3.1610.

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New bidentate Schiff base ligand (L) namely [(Z)-3-(2-oxoindolin-3ylildeneamino)benzoic acid] type (NO) was prepared via condensation of isatin and 3-amino benzoic acid in ethanol as a solvent in existence of drops of (glac. CH3COOH). The new ligand (L) was characterized base on elemental microanalysis, FT-IR, UV-Vis, 1H-NMR spectra along with melting point. Ligand complexes in general formula [M(L)2Cl2]. H2O, where: MII = Co, Cu, Cd, and Hg; L= C15H10 N2O3 were synthesized and identified by FT-IR, UV-Vis, 1H-NMR (for Cd complex only) spectra, atomic absorption, chloride content along with mol

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46

Selvarani, R., S. Balasubramaniyan, K. Rajasekar, M. Thairiyaraja, and R. Meenakshi. "Synthesis, DFT and Bio-Potential Activities of Mn(II) and Hg(II) Complexes with Bidentate (E)-N′[(E)-3-Phenylallylidene]benzene-1,2-diamine." Asian Journal of Chemistry 33, no. 6 (2021): 1222–28. http://dx.doi.org/10.14233/ajchem.2021.23150.

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A new bidentate Schiff base (E)-N′[(E)-3-phenylallylidene]benzene-1,2-diamine derived from the condensation of o-phenylenediamine and cinnamaldehyde and its Mn(II) and Hg(II) complexes were synthesized and characterized by elemental analysis, molar conductance, magnetic moment, electronic spectra, IR, far-IR and NMR (1H & 13C) spectral studies. The elemental analysis and these metal proposed the metal:ligand stoichiometry and molecular formulae of the metal complexes. The molar conductance and electrochemical property indicates monomeric, neutral nature and redox properties of the metal co

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47

Rani, V. E., and L. K. Ravindranath. "Synthesis, Characterization and Antimicrobial Evaluation of Novel Mannich Bases Containing Pyrazole-5-One Phosphonates." Open Pharmaceutical Sciences Journal 3, no. 1 (2016): 49–55. http://dx.doi.org/10.2174/1874844901603010049.

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Background: Newly synthesised compounds of phosphonates were prepared by condensation of diethylphosphate with imine which undergoes a reaction of mannich bases with pyrazole containing schiffs base. The base was prepared by condensation of aldehyde with primary amine. These newly synthesised derivatives were characterised by spectral analysis. Objective: Mannich bases are very important to synthesize wide variety of natural products and pharmaceuticals. Method: Thin Layer Chromatography was performed on aluminum sheet of silica gel 60F254, E-Merk, Germany using iodine as visualizing agent. IR

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48

Tripathi, Vishwa Deepak. "Synthesis of New Dihydropyrazoles of Designed Curcumin Analogues." Asian Journal of Chemistry 31, no. 9 (2019): 1889–94. http://dx.doi.org/10.14233/ajchem.2019.22023.

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Present work demonstrates a facile synthesis of a series of 20 dihydropyrazole derivatives from well designed curcumin analogues by reaction of chalcone derivatives with phenylhydrazine. All the synthesized compounds were characterized by spectroscopic (1H and 13C NMR, IR spectra), spectrometric (Mass spectra) data and elemental analysis. Synthesized dihydropyrazoles have diversity points on attached phenyl ring. Effect of substituent on reactivity was explained on the basis of electronic effect generated due to groups on phenyl ring. Presence of dd (double doublet) in 1H NMR spectrum of dihyd

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Ritter, Helmut, Berit Knudsen та Valerij Durnev. "Linkage of α-cyclodextrin-terminated poly(dimethylsiloxanes) by inclusion of quasi bifunctional ferrocene". Beilstein Journal of Organic Chemistry 9 (1 липня 2013): 1278–84. http://dx.doi.org/10.3762/bjoc.9.144.

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We report the noncovalent linkage of terminally substituted oligo(dimethylsiloxanes) bearing α-cyclodextrins (α-CD) as host end groups for the cyclopentadienyl rings of ferrocene. This double complexation of unsubstituted ferrocene leads to a supramolecuar formation of the siloxane strands. Structural characterization was performed by the use of 1H NMR and IR spectroscopy and by mass spectrometry. Electron microscopy studies and dynamic light scattering measurements show a significant decrease of the derivative size after the complexation with ferrocene. In addition, further evidence for the s

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50

Journal, Baghdad Science. "A New Derivatives of Benzodiazepine, Imidazole, Isatin, Maleimide, Pyrimidine and 1,2,4-Triazole: Synthesis and Characterization." Baghdad Science Journal 5, no. 2 (2008): 305–12. http://dx.doi.org/10.21123/bsj.5.2.305-312.

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The synthesis of new benzodiazepine, imidazole, isatin, maleimide, pyrimidine and 1,2,4-triazole derived from 2-amino-4-hydroxy-1,3,5-triazine, via its cyclocondensation reaction with different organic reagents, is described. FT-IR, 1H-NMR and as well as 13C-NMR spectra disclosed the structures of the precursors and heterocyclic derivatives formed.

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