3-(1H-Indol-3-yl)-2,4-dihydro-cyclopenta[b]indole-1,2-dicarboxylic acid diethyl ester 、
丁炔二酸二甲酯 以
苯 为溶剂,
以17.3%的产率得到1,1a-bis(ethoxycarbonyl)-6-methyl-5a-(N-methyl-3-indolyl)-2,3,4,5-tetrakis(methoxycarbonyl)-1,1a,5a,6-tetrahydrocyclohex<2,3>cyclopent
indole