Azoolefins 2 either decompose or react with aryldiiminea with uptake of an aryl group to give compounds 3. The latter can undergo ring closure to N-amino-indoles 4. In the 2,4,6-trichloro compound 3b ortho-chlorines are selectively replaced bymorpholine under very mild conditions giving 5a, which easily fragments to form the benzimidazole 7.
偶氮烯烃2分解或与芳基二
亚胺反应,并吸收芳基,得到化合物3。后者可以闭环成N-
氨基
吲哚4。在2,4,6-三
氯化合物3b中,选择性取代邻
氯苯并吗啉在非常温和的条件下产生5a,很容易裂解形成
苯并咪唑7。