Structure based design, synthesis, and biological evaluation of imidazole derivatives targeting dihydropteroate synthase enzyme
作者:Drashti G. Daraji、Dhanji P. Rajani、Smita D. Rajani、Edwin A. Pithawala、Sivaraman Jayanthi、Hitesh D. Patel
DOI:10.1016/j.bmcl.2021.127819
日期:2021.3
)-4-methyl-1H-imidazol-2-yl)thio)-N-(4-((benzyl)oxy)phenyl) acetamide derivatives. Antimicrobial activities of all the imidazole derivatives have been examined against Gram-positive and Gram-negative bacteria and results showed that the conjugates have appreciable antibacterial activity. Besides, several analogous were evaluated for their in vitro antiresistant bacterial strains such as Extended-spectrum
Determination of aromaticity indices of thiophene and furan by nuclear magnetic resonance spectroscopic analysis of their phenyl esters
作者:Chang Kiu Lee、Ji Sook Yu、Hye-Jin Lee
DOI:10.1002/jhet.5570390615
日期:2002.11
series of m- and p-substituted phenyl benzoates, 2-thienoates, and 2-furoates were prepared and their 1H and 13C nmr spectroscopic characteristics were examined. In general, good correlations were observed between the chemical shift values of protons and carbons of the acyl aromatic rings and the Hammett σ. Plots of the chemical shift values of the carbonyl carbons of the benzoates against those of
Carbene-Catalyzed Alkylation of Carboxylic Esters via Direct Photoexcitation of Acyl Azolium Intermediates
作者:Shi-Chao Ren、Wen-Xin Lv、Xing Yang、Jia-Lei Yan、Jun Xu、Fang-Xin Wang、Lin Hao、Huifang Chai、Zhichao Jin、Yonggui Robin Chi
DOI:10.1021/acscatal.1c00165
日期:2021.3.5
A carbene-catalyzed reductive coupling reaction of carboxylic esters and substituted Hantzsch esters is disclosed. Key steps of this reaction include one-electron reduction of a carbene catalyst-bound acyl azolium intermediate to generate the corresponding radical intermediate for subsequent alkylationreactions. The reaction is promoted by irradiation with visible light without the involvement of