(±) methyl 1-(2-oxopyrrolidin-3-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-1-carboxylate 、
N-(2,4-dimethylbenzoyl)imidazole 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以75 %的产率得到(±)-methyl 1-(1-(2,4-dimethylbenzoyl)-2-oxopyrrolidin-3-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-1-carboxylate