Highly efficient synthesis of 1,2-disubstituted acetylenes derivatives from the cross-coupling reactions of 1-bromoalkynes with organoalane reagents
作者:Xue-Bei Shao、Xin Jiang、Qing-Han Li、Zhi-Gang Zhao
DOI:10.1016/j.tet.2018.08.050
日期:2018.10
A Highly efficient route for the synthesis of 1,2-disubstituted acetylene derivatives has been developed by palladium catalyzed cross-couplings of alkynyl halides with (hetero)aryl aluminium reagents under mild conditions. This has given corresponding cross-coupling products good to excellent isolated yields of up to 99%. The aryls bearing electron-donating or electron-withdrawing groups in either
通过在温和条件下钯催化的炔基卤化物与(杂)芳基铝试剂的交叉偶联,已开发出一种高效的合成1,2-二取代乙炔衍生物的途径。这使得相应的交叉耦合产品具有高达99%的优良分离产率。在炔基卤化物或芳基铝基质中带有给电子或吸电子基团的芳基产生了良好的交联产物收率。此过程简单易行,为合成1,2-二取代的乙炔衍生物提供了一种有效的方法。根据实验结果,提出了可能的催化循环。