Benzyl 2-tert-butoxycarbonylamino-2-(dimethoxyphosphoryl)acetate 、
Methyl 7-[3-formyl-1-[(2-methylpropan-2-yl)oxycarbonyl]indol-4-yl]-1-(2-phenylmethoxybenzoyl)indole-3-carboxylate 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以76%的产率得到methyl 7-[1-[(2-methylpropan-2-yl)oxycarbonyl]-3-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-oxo-3-phenylmethoxyprop-1-enyl]indol-4-yl]-1-(2-phenylmethoxybenzoyl)indole-3-carboxylate