<4aR-(4aα,6α,8α,8aα)>-7,8-Bis<<(1,1-dimethylethyl)dimethylsilyl>oxy>-6-<<<(1,1-dimethylethyl)dimethylsilyl>oxy>methyl>-4a,7,8,8a-tetrahydro-3-(phenylmethoxy)-1H,6H-pyrano<3,2-e><1,3,4>oxadiazine-1-carboxylic acid phenylmethyl ester 、
双丙酮半乳糖 在
对甲苯磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 0.17h,
以71%的产率得到benzyl N-[(2R,3R,4R,5R,6R)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-6-[[tert-butyl(dimethyl)silyl]oxymethyl]-2-[[(1S,2R,6R,8R,9S)-4,4,11,11-tetramethyl-3,5,7,10,12-pentaoxatricyclo[7.3.0.02,6]dodecan-8-yl]methoxy]oxan-3-yl]-N-(phenylmethoxycarbonylamino)carbamate