3H-[1,2]Dithiolo[3,4-b]pyridine-3-thione and its derivatives Synthesis and antimicrobial activity
作者:Massimo Pregnolato、Marco Terreni、Daniela Ubiali、Giuseppe Pagani、Pietro Borgna、Fiorenzo Pastoni、Fabrizio Zampollo
DOI:10.1016/s0014-827x(00)00084-7
日期:2000.12
A series of 2-substituted isothiazolo[5,4-b]pyridine-3(2H)-thiones isothiazolo[5,4-b]pyridin-3(2H)-ones, N-substituted 2-sulfanylnicotinamides and the corresponding carbothioamide derivatives were synthesized and evaluated for their antimicrobial activity against several strains of Gram + and Gram - bacteria and fungi. Chemical syntheses were resumed into a comprehensive cyclic route that enables the reversible conversion for each derivative of the series considered. Among the tested compounds the N-(aralkyl)-2-sulfanylnicotinamides show the highest fungitoxicity (MIC = 1.25-5 mug/ml). The best activity towards Gram-positive bacteria was in the range of 2.5-5 mug/ml. Activity against Gram-negative bacteria was generally very poor for all compounds. (C) 2000 Elsevier Science S.A. All rights reserved.