Dicyano 9,10 dihydro 9,10 ethenoanthracene(4) was synthesized by addition reation of acetylenedinitrile and anthracene. Concave tetrazaporphyrin has been obtained from the four molecules of 4.

乙炔二环加成反应合成了11,12-二-9,10-二氢-9,10-亚乙基(4),4分子4自身加成聚合制备了一凹型四氮杂口卜啉结构化合物。