(R)-9-(tert-Butyl-dimethyl-silanyloxy)-7-hydroxy-2,4,4,8-tetramethyl-non-1-en-5-one 、 (R)-4-Benzyloxy-3-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-butyric acid 在
4-二甲氨基吡啶 、
N,N'-二环己基碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
以87%的产率得到(R)-4-Benzyloxy-3-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-butyric acid 1-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-4,4,6-trimethyl-3-oxo-hept-6-enyl ester