4-O-Acetyl-1,5-anhydro-2,6-dideoxy-3-O-(tert-butyldimethylsilyl)-L-arabino-hex-1-enitol 、
双丙酮半乳糖 在
三苯基膦氢溴酸盐 作用下,
以
二氯甲烷 为溶剂,
以78%的产率得到[(2S,3S,4S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-2-methyl-6-[[(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] acetate