Synthesis of 5-arylamino-1-arylpyrazoles from 5-aminopyrazoles with arylhalides via CuI catalyzed Ullman coupling reaction
作者:En-Chiuan Chang、Chun-Yen Chen、Li-Ya Wang、Yu-Ying Huang、Mou-Yung Yeh、Fung Fuh Wong
DOI:10.1016/j.tet.2012.11.022
日期:2013.1
An efficient method for synthesis of 5-arylamino-1-arylpyrazoles was developed by Ullman coupling reaction of 5-aminopyrazoles and arylhalides in the presence of cuprous iodide (CuI) as the catalyst. The corresponding 5-N-arylaminopyrazole products were obtained in good yields (>= 65%). (c) 2012 Elsevier Ltd. All rights reserved.
One-pot synthesis and antiproliferative evaluation of pyrazolo[3,4-d]pyrimidine derivatives
An efficient one-pot methodology for the synthesis of pyrazolo[3,4-d]pyrimidines was developed by using 5-aminopyrazoles with formamide in presence of PBr3 as the coupling agent. Among the examples presented in this work, compounds 41 and 54-56 with phenyl or 2-quinolinyl groups at N-1 and p-Me-Ph, p-Cl-Ph, or p-OMe-Ph group at C-3 position in the pyrazole ring possessed better potency against NCl-H226 and NPC-TW01 cancer cells with GI(50) values between 18 mu M and 39 mu M. (c) 2012 Elsevier Ltd. All rights reserved.