2-Aryl-5-acroleinyl-1,2,3,4-tetrazoles (1a–d) and 2-aryl-5-butadienyl-1,2,3,4-tetrazoles (1e–g) were subjected to flash vacuum pyrolysis. Acroleinyl derivatives resulted in nitrogen extrusion to give nitrilimines followed by ring closure to give the corresponding indazoles 3a–d in good yields. On the other hand, butadiene derivatives underwent ring fragmentation to give p-substituted anilines without
将2-芳基5-
丙烯醛基1,2,3,4-
四唑(1a – d)和2-芳基-5-
丁二烯基1,2,3,4-
四唑(1e – g)进行闪蒸。热解。
丙烯醛衍
生物导致氮气挤出,得到亚
硝胺,然后闭环,以高收率得到相应的
吲唑3a – d。另一方面,对
丁二烯衍
生物进行环断裂,得到对位取代的
苯胺,而没有形成预期的
吲唑。2-(4-
氯苯基)-5-
丙烯醛-1,2,3,4-
四唑(1c)和1-(4-
氯苯基)-4-
丙烯醛-
1,2,3-三唑(2个)进行了详细研究。DFT计算已用于检查参与偶氮基衍
生物热反应的中间体的亚
硝胺和卡宾性质。