Tetrazolo[1,5-a] quinoline derivatives as anti-inflammatory and antimicrobial agents [1].

Tetrazolo[1,5-a]quinoline derivatives bearing in the 4-position various thiazolidinone 3a-c, 5a-c and 7a-c, thiazinone 8a,b, thiazoline 9a-d and thiadiazoline 10a,b moieties have been synthesized and evaluated for anti-inflammatory activity and antimicrobial properties. The synthetic routes involved the reaction of tetrazolo[1,5-a]quinoline-4-carboxaldehyde 1 with amines and hydrazines to give the corresponding aniles 2a-c and hydrazones 4a-c respectively The latter compounds when treated with thioglycolic acid, furnished the corresponding thiazolidinone derivatives 3a-c and 5a-c. Moreover; thiosemicarbazone 6a-c derivatives were subsequently cyclized by various reagents giving rise the title compounds. Some of the products proved to possess potent anti-inflammatory and antimicrobial properties.