2-[(2S,4R,6R)-4-(tert-Butyl-diphenyl-silanyloxy)-6-(2-hydroxy-1,1-dimethyl-ethyl)-2-methoxy-tetrahydro-pyran-2-yl]-propionic acid methyl ester 在
pyridine-SO3 complex 、
二甲基亚砜 、
三乙胺 作用下,
反应 1.0h,
以95%的产率得到2-[(2S,4R,6R)-4-(tert-Butyl-diphenyl-silanyloxy)-6-(1,1-dimethyl-2-oxo-ethyl)-2-methoxy-tetrahydro-pyran-2-yl]-propionic acid methyl ester