(4R,6R,8R)-1-{(2S,4S,5R,6S)-4-Benzyloxy-6-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-5-methyl-tetrahydro-pyran-2-yl}-6-(tert-butyl-dimethyl-silanyloxy)-2-ethanesulfinyl-2-ethylsulfanyl-8-(4-methoxy-benzyloxy)-4,7,7-trimethyl-dec-9-en-3-ol 、
原甲酸三甲酯 在
甲醇 、
对甲苯磺酸 作用下,
反应 21.0h,
以50%的产率得到(2R,3S,4R,6R)-2-[(2S,4S,5R,6S)-4-Benzyloxy-6-(2-hydroxy-ethyl)-5-methyl-tetrahydro-pyran-2-ylmethyl]-2-methoxy-6-[(R)-2-(4-methoxy-benzyloxy)-1,1-dimethyl-but-3-enyl]-4-methyl-tetrahydro-pyran-3-ol