作者:Kostiantyn Liubchak、Andrey Tolmachev、Kostiantyn Nazarenko
DOI:10.1021/jo300176f
日期:2012.4.6
approach to 4-substituted imidazo[4,5-c]pyrazoles is proposed on the basis of the N′-(4-halopyrazol-5-yl)amidine cyclization under the conditions of copper-catalyzed cross-coupling reactions. Using 5-aminopyrazoles and copper catalysts as starting materials, the method is inexpensive and convenient and allows a wide range of substituents at all positions of the imidazo[4,5-c]pyrazole nucleus.
在N '-(4-卤并吡唑-5-基)am在铜催化交叉偶联反应条件下,提出了一种新的4-取代咪唑并[4,5-c]吡唑合成方法。使用5-氨基吡唑和铜催化剂作为起始原料,该方法便宜且方便,并且在咪唑并[4,5-c]吡唑核的所有位置上具有广泛的取代基。