α-(Thiocyanatomethyl)benzylidenemalononitrile undergoes azo coupling with diazotized aromatic amines (ArNH2) to afford azo derivatives. The azo derivatives (Ar = Ph, 4-MeC6H4, 4-ClC6H4, 4-MeOC6H4) were readily cyclized on reflux in aqueous NaOH to 3(2H)-pyridazinimine derivatives. These latter compounds were transformed into the corresponding pyrrole derivatives on reflux in glacial acetic acid with
α-(
硫氰酸根合甲基)亚苄基
丙二腈与重氮化的芳香胺 (ArNH2) 发生偶氮偶联,得到偶氮衍
生物。偶氮衍
生物(Ar = Ph、4-MeC6H4、4-ClC6H4、4-MeOC6H4)在 NaOH
水溶液中回流时很容易环化成 3(2H)-
哒嗪亚胺衍
生物。这些后一种化合物在含有
锌粉的
冰醋酸中回流转化为相应的
吡咯衍
生物,这可能是通过 N-N 键的还原裂解,然后再循环而失去
氨。在类似条件下,偶氮衍
生物 (Ar = 2-NCC6H4) 被环化成 6H-
哒嗪并[3,2-a]
喹唑啉-6-
亚胺衍
生物,该衍
生物很容易转化为 6H-
哒嗪并[3,2-a]
喹唑啉- 6-1 在
乙醇 HCl 中回流。最后一种化合物也由偶氮衍
生物(Ar = 2-HOOCC6H4 和 2-MeOOCC6H4)通过在 NaOH
水溶液中回流获得。