Benzoic acid (3R,4S,5R,6R)-5-benzyloxy-6-benzyloxymethyl-4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-tetrahydro-pyran-3-yl ester 在
草酰溴 作用下,
以
氯仿 、
N,N-二甲基甲酰胺 为溶剂,
生成
Benzoic acid (2R,3R,4S,5R,6R)-5-benzyloxy-6-benzyloxymethyl-2-bromo-4-(tert-butyl-dimethyl-silanyloxy)-tetrahydro-pyran-3-yl ester