Catalytic and Stereoselective Glycosylation with Disarmed Glycosyl Fluoride Having Phthaloyl or Dichlorophthaloyl Protected Amino Function Using a 1:2 Combination of Stannic Chloride and Silver Tetrakis(pentafluorophenyl)borate

摘要

A catalytic and stereoselective glycosylation of various glycosyl acceptors with disarmed glycosyl fluorides having phthaloyl or dichlorophthaloyl rpotected amino function is successfully carried out by tetrakis(pentafluorophenyl)borate [AgB(C_6F_5)_4] in the coexistence of MS 5A, and the corresponding 1,2-trans disaccharides are obtained in high yields.