[(1S,2S,4R,11S,13S,14R,15R)-2,4-Bis-(tert-butyl-dimethyl-silanyloxy)-13,14-dihydroxy-1,11,15-trimethyl-nonadecyl]-carbamic acid benzyl ester 、
(S)-3-Methoxycarbonyl-pentanedioic acid monomethyl ester 在
4-二甲氨基吡啶 、
1-(3-二甲基氨基丙基)-3-乙基碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
生成 (R)-3-Methoxycarbonyl-pentanedioic acid (1S,3S,10R,12S,13S)-13-benzyloxycarbonylamino-1-[(1R,2R)-1-((R)-3,4-bis-methoxycarbonyl-butyryloxy)-2-methyl-hexyl]-10,12-bis-(tert-butyl-dimethyl-silanyloxy)-3-methyl-tetradecyl ester methyl ester