Synthesis of N-glycosylthioureas, N-glycosylrhodanines, and N-glycosyl-2-aminothiazoles and their antimicrobial activity.
A method for obtaining N-beta-D-glucopyranosylthioureas was found in the aminolysis of N-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)-5-aralkylidenerhodan ines. Aminolysis of the triacetylated or tribenzoylated ribosylrhodanines generally did not give ribosylthioureas but resulted in glycosidic cleavage, although N-(2,3,5-tri-O-benzoyl-beta-D-ribofuranosyl)thioureas were obtained using morpholine and hydroxylamine. Ring closure of N-beta-D-glucopyranosylthiourea with ethyl bromopyruvate gave ethyl 2-(N-beta-D-glucopyranosyl)aminothiazole-4-carboxylate, and ammonolysis led to the corresponding 4-carboxamide. Antimicrobial screening against five microorganisms showed that N-(2,3,5-tri-O-acetyl-beta-D-ribofuranosyl)rhodanine and the glucosylaminothiazole-4-carboxylate had the broadest spectrum of inhibitory activity, although the thioureas usually showed inhibition of some organisms.
D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D006031:Glycosylation; D008826:Microbial Sensitivity Tests; D012236:Rhodanine / Q000138:chemical synthesis* / Q000494:pharmacology; D013844:Thiazoles / Q000138:chemical synthesis* / Q000494:pharmacology; D013890:Thiourea / Q000138:chemical synthesis* / Q000494:pharmacology
D000890:Anti-Infective Agents; D013844:Thiazoles; D012236:Rhodanine; D013890:Thiourea