Reaction of 1,3-dicarbonyl compounds with<i>o</i>-phenylenediamine or 3,3′-diaminobenzidine in water or under solvent-free conditions via microwave irradiation
作者:Zhong-Xia Wang、Hua-Li Qin
DOI:10.1002/jhet.5570420540
日期:2005.7
Reaction of ophenylenediamine with β-diketones or β-ketoesters in water formed 2-substituted benzimi-dazoles. Reaction of 3,3′-diaminobenzidine gave similar results. Under microwave irradiation conditions solvent-free reaction of o-phenylenediamine with β-ketoesters afforded l,5-benzodiazepin-2-one derivatives. An exception is the reaction of o-phenylenediamine with ethyl acetoacetate under microwave
邻苯二胺与
β-二酮或β-
酮酸酯在
水中的反应形成2-取代的
苯并咪唑。3,3′-二
氨基
联苯胺的反应得到相似的结果。在微波辐射条件下,
邻苯二胺与β-
酮酸酯的无溶剂反应得到1,5-苯并二氮杂-2-酮衍
生物。例外是
邻苯二胺与
乙酰乙酸乙酯在微波辐射下反应,得到
2-甲基苯并咪唑。