Palladium-Catalyzed Oxidative Cross-Coupling of N-Tosylhydrazones or Diazoesters with Terminal Alkynes: A Route to Conjugated Enynes
作者:Lei Zhou、Fei Ye、Jiachen Ma、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201007224
日期:2011.4.4
Coming at them from another angle: In a fresh approach to the synthesis of conjugated alkynes, the palladium‐catalyzed cross‐coupling of N‐tosylhydrazones or diazoesters with terminal alkynes provided the desired enyne products with excellent stereoselectivity (see scheme; Ts=p‐toluenesulfonyl). The reaction is proposed to involve an unprecedented alkynyl migratory insertion of a palladium carbene
从另一个角度出发:在一种新颖的共轭炔烃合成方法中,钯催化的N-甲苯磺酰hydr或重氮酸酯与末端炔烃的交叉偶联为所需的烯炔产物提供了出色的立体选择性(参见方案; Ts = p ‐甲苯磺酰基)。提出该反应涉及钯卡宾络合物的前所未有的炔基迁移插入。