One-pot synthesis of 2H-phenanthro[9,10-c]pyrazoles from isoflavones by two dehydration processes
作者:Qiuya Wang、Zunting Zhang、Zichao Du、Huiliang Hua、Shasha Chen
DOI:10.1039/c3gc40205c
日期:——
developed for one-pot synthesis of a series of 2H-phenanthro[9,10-c]pyrazoles in EtOH by two dehydration processes. Firstly, 3,4-diaryl-1H-pyrazoles were synthesized by the cyclocondensation of isoflavones and hydrazine hydrate in refluxing EtOH. Secondly, the final target products 2H-phenanthro[9,10-c]pyrazoles were given by photocyclization and dehydration of 3,4-diaryl-1H-pyrazoles in 1:1 (v/v) EtOH–H2O
开发了一种环境友好,高效的方法,用于一锅合成一系列2 H-菲并[9,10- c ]吡唑类化合物。乙醇通过两个脱水过程。首先,通过环缩合反应合成了3,4-二芳基-1 H-吡唑类化合物。异黄酮 和 水合肼 在回流中 乙醇。其次,通过3 :4-二芳基-1 H-吡唑以1 :1(v / v)的光环化和脱水作用,得到最终目标产物2 H-菲并[9,10- c ]吡唑乙醇–高氧2。这种方法的优点是催化剂-合成路线短,反应条件温和且易于后处理。另外,测定了2 H-菲并[9,10- c ]吡唑的荧光性质。