Synthesis of N-substituted carbazolones from α-iodo enaminones via Pd(0)-catalyzed intramolecular coupling under microwave irradiation
作者:Xi-Liu Yun、Wen-Ying Bi、Jian-Hui Huang、Yu Liu、Daisy Zhang-Negrerie、Yun-Fei Du、Kang Zhao
DOI:10.1016/j.tetlet.2012.07.009
日期:2012.9
A variety of N-aryl and N-alkyl carbazolones were conveniently achieved in good to high yields via Pd2(dba)3-mediated intramolecular coupling of N-substituted α-iodo enaminones under microwave irradiation. The Pd(0)-catalyzed cyclization was found to proceed favorably with the more electron-deficient phenyl ring during the reactions involving unsymmetrical N,N-diaryl α-iodo enaminones. This unique
在微波辐射下,通过Pd 2(dba)3介导的N-取代的α-碘烯基烯酮的分子内偶联,可以方便地以高产率或高产率获得各种N-芳基和N-烷基咔唑酮。发现在涉及不对称的N,N-二芳基α-碘烯胺酮的反应中,Pd(0)催化的环化反应有利于电子缺陷少的苯环。这种独特的性质使得能够构建含有硝基取代的苯环的咔唑酮骨架。