<i>Z</i>-Selective Olefin Synthesis via Iron-Catalyzed Reductive Coupling of Alkyl Halides with Terminal Arylalkynes
作者:Chi Wai Cheung、Fedor E. Zhurkin、Xile Hu
DOI:10.1021/jacs.5b01784
日期:2015.4.22
Selective catalytic synthesis of Z-olefins has been challenging. Here we describe a method to produce 1,2-disubstituted olefins in high Z selectivity via reductive cross-coupling of alkyl halides with terminal arylalkynes. The method employs inexpensive and nontoxic catalyst (iron(II) bromide) and reductant (zinc). The substrate scope encompasses primary, secondary, and tertiary alkyl halides, and
Z-烯烃的选择性催化合成一直具有挑战性。在这里,我们描述了一种通过卤代烷与末端芳基炔的还原交叉偶联以高Z选择性生产1,2-二取代烯烃的方法。该方法采用廉价且无毒的催化剂(溴化铁(II))和还原剂(锌)。底物范围涵盖伯、仲、叔卤代烷,反应可耐受大量官能团。该方法的实用性在几种药学相关分子的合成中得到了证明。机理研究表明该反应通过铁催化的反选择性卡肼化途径进行。