4-(GLYCOPYRANOSYL)-SEMICARBAZIDES AS AN INTERMEDIATE PRODUCTS FOR SYNTHESIS OF COMPOUNDS SHOWING ANTIINFLAMMATORY AND ANTIMICROBIAL ACTIVITY

摘要

FIELD: organic chemistry. SUBSTANCE: product: 4-(glycopyranosyl)-semicarbazides of the formula RNHCONHNH₂, at R; yield, %; m. p. C; [α]2D⁰; a) D-galactosyl; 70; 168-170; +10.4 (c=1, water); b) D-glucosyl; 55; 148-150; -14.6 (c=1, water); c) L-arabinopyranosyl; 43.5; 134-135; +44.1. Reagent 1: N-methyl-N′-glycopyranosyl-N-nitrosourea of the formula RNHCON(NO)CH₃. Reagent 2: hydrazine hydrate. Reaction conditions: at 25-60 C and stirring. EFFECT: improved method of synthesis.