2,2-dimethyl-propionic acid 4-(tert-butyl-diphenyl-silanyloxy)-4-(4,6-dimethoxy-6-{4-[9-(4-methoxy-benzyloxy)-7-methoxymethoxy-2,4,6-trimethyl-3-oxo-5-triethylsilanyloxy-non-1-enyl]-oxazol-2-ylmethyl}-tetrahydro-pyran-2-yl)-2-methyl-but-2-enyl ester 在
sodium tetrahydroborate 、 cerium(III) chloride 作用下,
以
甲醇 为溶剂,
反应 1.0h,
以98%的产率得到[(E,4R)-4-[tert-butyl(diphenyl)silyl]oxy-4-[(2R,4R,6S)-6-[[4-[(E,3R,4S,5R,6S,7R)-3-hydroxy-7-(methoxymethoxy)-9-[(4-methoxyphenyl)methoxy]-2,4,6-trimethyl-5-triethylsilyloxynon-1-enyl]-1,3-oxazol-2-yl]methyl]-4,6-dimethoxyoxan-2-yl]-2-methylbut-2-enyl] 2,2-dimethylpropanoate