Green approach for the synthesis of thiophenyl pyrazoles and isoxazoles by adopting 1,3-dipolar cycloaddition methodology and their antimicrobial activity
作者:D.V. Sowmya、G. Lakshmi Teja、A. Padmaja、V. Kamala Prasad、V. Padmavathi
DOI:10.1016/j.ejmech.2017.11.093
日期:2018.1
A variety of N-((1,3-dipheny1-5-aryl-1H-pyrazol-4-yl)sulfonyl)thiophene-2-carboxamides (7) and N-((5ary1-3-phenylisoxazol-4-yl)sulfonyl)thiophene-2-carboxamides (8) were prepared from (E)-N-(aryl-ethenesulfonyl)thiophene-2-carboxamides (4) adopting 1,3 -dipolar cycloaddition of nitrile imines and nitrile oxides generated from araldehyde phenylhydrazones and araldoximes in the presence of iodosobenzene and CTAB followed by oxidation with 12 in DMSO. The compounds 4f, 7e, 7f, 8e and 8f showed potential antibacterial activity against B. subtilis whereas Se and 8f exhibited potential antifungal activity against A. niger. (C) 2017 Elsevier Masson SAS. All rights reserved.