(4R,5S,6R)-6-((2S,3S)-3-(tert-butyldiphenylsilyloxy)butan-2-yl)-2,2,5-trimethyl-1,3-dioxane-4-carbaldehyde 、
methyl (2Z,4E,6R,7S,8S,10E)-2-methoxy-4,6,8,10-tetramethyl-7-(triethylsilyloxy)trideca-2,4,10-trien-12-ynoate 在
(1S,2s)-(+)-n-甲基伪麻黄碱 、 zinc trifluoromethanesulfonate 、
N,N-二异丙基乙胺 作用下,
以
甲苯 为溶剂,
反应 17.58h,
以91%的产率得到methyl (2Z,4E,6R,7S,8S,10E,14S)-14-((4R,5S,6R)-6-((2S,3S)-3-(tert-butyldiphenylsilyloxy)butan-2-yl)-2,2,5-trimethyl-1,3-dioxan-4-yl)-14-hydroxy-2-methoxy-4,6,8,10-tetramethyl-7-(triethylsilyloxy)tetradeca-2,4,10-trien-12-ynoate