作者:Tamás Patonay、Rezsö Bognár、György Litkei
DOI:10.1016/s0040-4020(01)83509-2
日期:1984.1
The reaction of 2'-hydroxychalcone dibromides 1 or α-bromo-2'-hydroxychalcones 15 with sodium azide resulted in a mixture of α-azido-2'-hydroxychalcones 2, 3-aryl-5-(2-hydroxy-pheny)isoxazoles 3, flavones 4, aurones 5 and 4-aryl-5-(2-hydroxybenzoyl)-1,2,3-triazoles 6. The product ratio was strongly influenced by the character of the substituent at position C-4. Similar results were obtained with 2
2'-羟基查耳酮的二溴化物反应1或α-溴-2'- hydroxychalcones 15与叠氮化钠导致α叠氮基-2'- hydroxychalcones的混合物2,3-芳基-5-(2-羟基-苯基)异恶唑3,黄酮4,金酮5和4-芳基-5-(2-羟基苯甲酰基)-1,2,3-三唑6。产物比率受C-4位取代基的特性强烈影响。用2'-苄氧基-4-硝基查尔酮二溴化物(10)和2'-苄氧基-α-溴-4-硝基查尔酮(17)获得了相似的结果。讨论了通过α-溴查耳酮中间体将查尔酮二溴化物转化为产物的机理。