ethyl 2-[2-(2-oxopropylidene)hydrazino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate 、
ethyl 2-cyano-3-(4-methoxyphenyl)prop-2-enoate 在
吡啶 作用下,
反应 0.03h,
以79%的产率得到ethyl 2-acetyl-3-(4-methoxyphenyl)-6-oxo-5,6,7,8,9,10-hexahydro-3H-[1]benzothieno[3',2':5,6]pyrimido[1,2-b]pyridazine-4-carboxylate