2-(2-Bromo-5-methoxy-4-methyl-3,6-dioxo-cyclohexa-1,4-dienyl)-malonic acid tert-butyl ester ethyl ester 在
silica gel 作用下,
以
氯仿 为溶剂,
生成 7-Methoxy-6-methyl-5,8-dioxo-1,2,3,5,8,9a-hexahydro-pyrrolo[1,2-a]indole-9,9-dicarboxylic acid tert-butyl ester ethyl ester