丙二酸二乙酯 、
10-Ethyl-4,6,11-trimethyl-2,12-dioxo-1,3-diazatricyclo[7.3.0.03,7]dodeca-4,6,8,10-tetraene-5-carbaldehyde 在
哌啶 作用下,
生成 Diethyl 2-[(10-ethyl-4,6,11-trimethyl-2,12-dioxo-1,3-diazatricyclo[7.3.0.03,7]dodeca-4,6,8,10-tetraen-5-yl)methylidene]propanedioate