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. 2000 Nov-Dec;55(11-12):669-79.
doi: 10.1016/s0014-827x(00)00084-7.

3H-[1,2]Dithiolo[3,4-b]pyridine-3-thione and its derivatives synthesis and antimicrobial activity

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3H-[1,2]Dithiolo[3,4-b]pyridine-3-thione and its derivatives synthesis and antimicrobial activity

M Pregnolato et al. Farmaco. 2000 Nov-Dec.

Abstract

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 microg/ml). The best activity towards Gram-positive bacteria was in the range of 2.5-5 microg/ml. Activity against Gram-negative bacteria was generally very poor for all compounds.

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