7-(4-methoxy-benzyloxy)-2-{4-(4-methoxy-benzyloxy)-3-[2-(4-methoxy-benzyloxy)-1-(4-methoxy-benzyloxymethyl)-pent-4-enyloxy]-2-methyl-hept-6-enyl}-9,10a-dimethyl-6-triisopropylsilanyloxymethyl-octahydro-1,5-dioxa-benzocycloocten-3-one 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以89%的产率得到(2S,4aS,6R,7S,9R,10aR)-2-[(2S)-2-[(2R,3S,5Z,8R,9S)-3,8-bis[(4-methoxyphenyl)methoxy]-9-[(4-methoxyphenyl)methoxymethyl]-2,3,4,7,8,9-hexahydrooxonin-2-yl]propyl]-7-[(4-methoxyphenyl)methoxy]-9,10a-dimethyl-6-[tri(propan-2-yl)silyloxymethyl]-4a,6,7,8,9,10-hexahydro-4H-pyrano[3,2-b]oxocin-3-one