Catalytic and Stereoselective Glycosylation with a Novel and Efficient Disarmed Glycosyl Donor: Glycosyl<i>p</i>-Trifluoromethylbenzylthio-<i>p</i>-trifluoromethylphenyl Formimidate
作者:Teruaki Mukaiyama、Hiroyuki Chiba、Setsuo Funasaka
DOI:10.1246/cl.2002.392
日期:2002.3
efficient glycosyl donor having a p-trifluoro-methylbenzylthio-p-trifluoromethylphenyl formimidate function as a leaving group is easily prepared by the addition of anomeric hydroxyl group of 2,3,4,6-tetra-O-benzoyl-α,β-D-glucopyranose to p-trifluoromethylphenyl isothiocyanate, followed by treatment with p-trifluoromethylbenzyl bromide. Catalytic and stereoselective glycosylation using this glycosyl donor
通过添加2,3,4,6-四-O-苯甲酰基-α的异头羟基,可以很容易地制备出具有对三氟-甲基苄硫基-对-三氟甲基苯基甲酰亚胺酯官能团作为离去基团的新型高效糖基供体, β-D-吡喃葡萄糖转化为对三氟甲基苯基异硫氰酸酯,然后用对三氟甲基苄基溴处理。使用这种糖基供体的催化和立体选择性糖基化通过用各种质子酸和路易斯酸激活其氮原子来有效进行。