AbstractA convenient platinum‐catalyzed tandem cyclization reaction from readily available aminoalkynes and enones has been developed to efficiently prepare multiply substituted indolines in good yields under microwave irradiation within a short reaction time. This efficient reaction is presumed to proceed via a tandem process involving intramolecular hydroamination of aminoalkynes, Michael addition of enones, aldol condensation and intermolecular transfer hydrogenation.magnified image
Highly Efficient and Regioselective Platinum(II)-Catalyzed Tandem Synthesis of Multiply Substituted Indolines and Tetrahydroquinolines
作者:Xin-Yuan Liu、Chi-Ming Che
DOI:10.1002/anie.200805383
日期:2009.3.16
special advantage: The platinum(II)‐catalyzed tandemcyclization of aminoalkynes with 1,3‐diketones offers a new and highly efficient method for the synthesis of indolines and tetrahydroquinolines (see scheme; M.S.=molecular sieves). This transformation affords good to excellent product yields with high regio‐ and chemoselectivity under mild reactionconditions.
一个特殊的优势:带有1,3-二酮的铂(Ⅱ)催化的氨基炔的串联环化为合成二氢吲哚和四氢喹啉提供了一种高效的新方法(见方案; MS =分子筛)。在温和的反应条件下,这种转化可提供良好的产品收率,具有很高的区域选择性和化学选择性。