Ligand-Controlled Regioselective Hydrocarboxylation of Styrenes with CO<sub>2</sub> by Combining Visible Light and Nickel Catalysis
作者:Qing-Yuan Meng、Shun Wang、Gregory S. Huff、Burkhard König
DOI:10.1021/jacs.7b13448
日期:2018.3.7
while employing 1,4-bis(diphenylphosphino)butane (dppb) as the ligand favors the formation of the anti-Markovnikov product. A range of functional groups and electron-poor, -neutral, as well as electron-rich styrene derivatives are tolerated by the reaction, providing the desired products in moderate to good yields. Preliminary mechanistic investigations indicate the generation of a nickel hydride (H-NiII)
已经开发了在室温下使用双可见光镍催化在大气压 CO2 下苯乙烯的配体控制的马尔科夫尼科夫和反马尔科夫尼科夫加氢羧化反应。在新铜碱作为配体的情况下,仅获得 Markovnikov 产物,而采用 1,4-双(二苯基膦基)丁烷 (dppb) 作为配体有利于形成抗 Markovnikov 产物。该反应可以耐受一系列官能团和缺电子、中性和富电子苯乙烯衍生物,从而以中等至良好的产率提供所需的产物。初步机理研究表明生成了氢化镍 (H-NiIII) 中间体,随后不可逆地添加到苯乙烯中。