3-{1-Benzyloxymethyl-4-[1-((3aR,4R,6R,7aR)-1-benzyloxymethyl-4-iodomethyl-2-oxo-hexahydro-pyrano[4,3-d]oxazol-6-yl)-1H-indol-3-yl]-2,5-dioxo-2,5-dihydro-1H-pyrrol-3-yl}-indole-1-carboxylic acid benzyl ester 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
四氢呋喃 为溶剂,
以98%的产率得到3-{1-Benzyloxymethyl-4-[1-((3aR,6R,7aR)-1-benzyloxymethyl-4-methylene-2-oxo-hexahydro-pyrano[4,3-d]oxazol-6-yl)-1H-indol-3-yl]-2,5-dioxo-2,5-dihydro-1H-pyrrol-3-yl}-indole-1-carboxylic acid benzyl ester