Synthesis of 5,7-diarylpyrazolo[1,5- a ]pyrimidines via KOH mediated tandem reaction of 1 H -pyrazol-3-amines and chalcones
作者:Pinku Kaswan、Kasiviswanadharaju Pericherla、Deepshikha Purohit、Anil Kumar
DOI:10.1016/j.tetlet.2014.11.121
日期:2015.1
An efficient and facile protocol has been developed for the synthesis of pyrazolo[1,5-a]pyrimidines through the tandem reaction of 3-aminopyrazoles and chalcones in the presence of catalytic amounts of KOH. The reported method offers access to 5,7-diarylpyrazolo[1,5-a]pyrimidines in good to excellent yields. A gram-scale reaction has been performed to demonstrate the potency of optimized procedure for
在催化量的KOH存在下,通过3-氨基吡唑和查耳酮的串联反应合成吡唑并[1,5- a ]嘧啶的有效而简便的方法已被开发出来。报道的方法提供了以良好或优异的产率获得5,7-二芳基吡唑并[1,5- a ]嘧啶的方法。已经进行了克规模的反应,以证明用于放大工艺的优化程序的效力。