title: 3H-[1,2]Dithiolo[3,4-b]pyridine-3-thione and its derivatives synthesis and antimicrobial activity.
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.
authors.affiliation: Dipartimento di Chimica Farmaceutica, Università degli Studi, Pavia, Italy. maxp@pbl.unipv.it
authors.forename: M
authors.initials: M
authors.lastname: Pregnolato
authors.forename: M
authors.initials: M
authors.lastname: Terreni
authors.forename: D
authors.initials: D
authors.lastname: Ubiali
authors.forename: G
authors.initials: G
authors.lastname: Pagani
authors.forename: P
authors.initials: P
authors.lastname: Borgna
authors.forename: F
authors.initials: F
authors.lastname: Pastoni
authors.forename: F
authors.initials: F
authors.lastname: Zampollo
mesh_terms: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D005658:Fungi / Q000187:drug effects; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D008055:Lipids / Q000737:chemistry; D008826:Microbial Sensitivity Tests; D011725:Pyridines / Q000737:chemistry* / Q000494:pharmacology; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship; D013871:Thiones / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D008055:Lipids; D011725:Pyridines; D013871:Thiones