已开发出一种有效的铜催化级联环化反应,用于选择性合成各种苯并[4,5]咪唑并[2,1- a ]异喹啉衍生物。该反应特征在于依次形成三个不同的C N键。在存在Cu(OAc)2和KO t Bu的情况下,邻炔基苯甲腈和2-碘苯胺能顺利进行,以中等至良好的产率获得相应的苯并[4,5]咪唑并[2,1- a ]异喹啉。
已开发出一种有效的铜催化级联环化反应,用于选择性合成各种苯并[4,5]咪唑并[2,1- a ]异喹啉衍生物。该反应特征在于依次形成三个不同的C N键。在存在Cu(OAc)2和KO t Bu的情况下,邻炔基苯甲腈和2-碘苯胺能顺利进行,以中等至良好的产率获得相应的苯并[4,5]咪唑并[2,1- a ]异喹啉。
Platinum(II)-catalyzed intramolecular cyclization of alkynylbenzonitriles: synthesis of 1-alkoxyisoquinolines and isoquinolones
作者:Jim Li、Lijing Chen、Elbert Chin、Alfred S. Lui、Hasim Zecic
DOI:10.1016/j.tetlet.2010.09.136
日期:2010.12
A facile synthesis of a series of 1-alkoxyisoguinolines and (2H)-isoguinolones by an intramolecular 6-endo-dig cyclization of ortho-alkynylbenzonitriles in the presence of a catalytic amount of hydrido(dimethylphosphinous acid-kappa P)[hydrogen bis(dimethylphosphinito-kappa P)]platinum(II) in various alcohols at 65-90 degrees C is described for the first time. (C) 2010 Elsevier Ltd. All rights reserved.