作者:Christophe Despinoy、Douglas Lloyd、Hamish McNab、David Reed
DOI:10.1016/s0040-4020(98)00523-7
日期:1998.8
°C gave a range of heterocyclic products (e.g. quinoxalines 8, 10 and 11, indole 9, benzimidazole 5 and pyrazole 7) in low yields. The formation of most products is initiated by cleavage of the 2,3-bond to give a diradical intermediate, though the pyrazole is obtained by a mechanism involving a 1,5-hydrogen shift followed by an unusual ring contraction.
2,4-二苯基-和2,4-二甲基-1,5-苯并二氮杂卓3和4在800-850°C的气相热解产生了一系列杂环产物(例如喹喔啉8、10和11,吲哚9,苯并咪唑5和吡唑7)的收率低。大多数产物的形成是通过2,3-键的裂解而开始的,从而得到双自由基中间体,尽管吡唑是通过涉及1,5-氢转移然后发生异常环收缩的机理而获得的。