磷酰基乙酸三乙酯 、 (R)-2,3-Bis-(tert-butyl-dimethyl-silanyloxy)-4-methyl-5-oxo-pentanoic acid ethyl ester 在
四氧化锇 、
N-甲基吲哚酮 、 sodium hydride 作用下,
生成
(2S,3R,4S,5R,6S)-2,3-Bis-(tert-butyl-dimethyl-silanyloxy)-5,6-dihydroxy-4-methyl-heptanedioic acid diethyl ester 、 (S)-[(2R,3S,4S,5R)-4,5-Bis-(tert-butyl-dimethyl-silanyloxy)-3-methyl-6-oxo-tetrahydro-pyran-2-yl]-hydroxy-acetic acid ethyl ester