Preparation of 3,5-bis-(β- d -glycopyranosyl)-1,2,4-thiadiazoles from C -(β- d -glycopyranosyl)thioformamides
摘要:
Acylated C-glycopyranosyl thioformamides of D-gluco, D-galacto, and D-xylo configuration were obtained by treating the corresponding glycosyl cyanides with hydrogen sulfide in the presence of triethylamine. The thioformamides gave 3,5-bis-(beta -D-glycopyranosyl)-1,2,4-thiadiazoles in reactions with potassium bromate and sodium dithionite in dichloromethane-water biphasic solvent mixture. Deprotected derivatives were prepared by Zemplen deacylation. (C) 2001 Elsevier Science Ltd. All rights reserved.
Preparation of 3,5-bis-(β- d -glycopyranosyl)-1,2,4-thiadiazoles from C -(β- d -glycopyranosyl)thioformamides
摘要:
Acylated C-glycopyranosyl thioformamides of D-gluco, D-galacto, and D-xylo configuration were obtained by treating the corresponding glycosyl cyanides with hydrogen sulfide in the presence of triethylamine. The thioformamides gave 3,5-bis-(beta -D-glycopyranosyl)-1,2,4-thiadiazoles in reactions with potassium bromate and sodium dithionite in dichloromethane-water biphasic solvent mixture. Deprotected derivatives were prepared by Zemplen deacylation. (C) 2001 Elsevier Science Ltd. All rights reserved.