cycloadditions of 1,3-di-t-butylallene-1,3-dicarbonitrile (3) to azomethines or an acyclic amidine afford 2-alkylidene azetidines 12, 19. In the reaction of 3 with the 3-dimethylamino-2H-azirine 20 the 1,2 bond of the 3-membered ring is cleaved to give the stereoisomeric 1-pyrrolines 23.
1,3-二叔butylallene -1,3-二腈(的(2 + 2)环加成3),以甲
亚胺或无环脒得到2-亚烷基氮杂
环丁烷12,19。在3与3-二甲基
氨基-2H-
叠氮基20的反应中,三元环的1,2键被裂解,得到立体异构的1-
吡咯啉23。