(E)-(2R,3S,4S,5R,6S,7R,10S)-2,7-bis{[tert-butyl(dimethyl)silyl]oxy}-3-methoxy-4,6,8,10-tetramethyl-11-oxo-5-[(triethylsilyl)oxy]dodec-8-enoic acid allyl ester 、
(2S,3R,4S,5S,6E,8S,9Z)-5-(tert-butyldimethylsilyloxy)-3-(p-methoxybenzyloxy)-4-[(p-methoxyphenyl)diphenylmethoxymethyl]-2,6,8-trimethylundeca-6,9-diene-1-al 在
双(三甲基硅烷基)氨基钾 作用下,
以
四氢呋喃 、
甲苯 为溶剂,
以59%的产率得到(2R,3S,4S,5R,6S,7R,8E,10S,14R,15S,16S,17S,18E,20S,21Z)-allyl 2,7,17-tris(tert-butyldimethylsilyloxy)-13-hydroxy-3-methoxy-15-(p-methoxybenzyloxy)-16-[(p-methoxyphenyl)diphenylmethoxymethyl]-4,6,8,10,14,18,20-heptamethyl-11-oxo-5-triethylsilyloxytricosa-8,18,21-trienoate