(E,3S,6R,7S)-6-[tert-butyl(dimethyl)silyl]oxy-3,5,7-trimethyl-8-triethylsilyloxyoct-4-en-2-one 、 Acetic acid (2S,3S,4S)-2-((S)-(tert-butyl-dimethyl-silanyloxy)-{(2S,3R)-3-[(S)-2-(4-methoxy-benzyloxy)-1-methyl-ethyl]-2-methyl-oxiranyl}-methyl)-4-methyl-5-oxo-3-triethylsilanyloxy-pentyl ester 在
lithium hexamethyldisilazane 、 4 A molecular sieve 作用下,
以
四氢呋喃 为溶剂,
以53%的产率得到[(E,2S,3R,4R,5S,8S,11R,12S)-11-[tert-butyl(dimethyl)silyl]oxy-2-[(S)-[tert-butyl(dimethyl)silyl]oxy-[(2S,3R)-3-[(2S)-1-[(4-methoxyphenyl)methoxy]propan-2-yl]-2-methyloxiran-2-yl]methyl]-5-hydroxy-4,8,10,12-tetramethyl-7-oxo-3,13-bis(triethylsilyloxy)tridec-9-enyl] acetate