三乙基氯硅烷 、
(1R,2S,3R,4R,7S,8R,9S,12S,13S,15S,16S,18S)-15,16-dihydroxy-7,9,13-trimethyl-3-phenylmethoxy-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosan-6-one 在
咪唑 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以100%的产率得到(1R,2S,3R,4R,7S,8R,9S,12S,13S,15S,16S,18S)-7,9,13-trimethyl-3-phenylmethoxy-15,16-bis(triethylsilyloxy)-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosan-6-one