A series of novel azo group fused 2H-chromenes and 4H-chromenes were synthesised as well as pyranopyrazole derivatives via the Knoevenagel condensation reaction of C–H acid compounds with 5-(arylazo)salicylaldehydes by a nucleophilic addition to the carbonyl group followed cyclisation.
通过C-H酸化合物与5-(芳基偶氮)
水杨醛的Knoevenagel缩合反应,通过羰基的亲核加成然后环化,合成了一系列新型偶氮基团稠合的
2H-色烯和4H-色烯以及
吡并
吡唑衍
生物。