Reductive Coupling between Aromatic Aldehydes and Ketones or Imines by Copper Catalysis
作者:Mitsutaka Takeda、Atsuhisa Mitsui、Kazunori Nagao、Hirohisa Ohmiya
DOI:10.1021/jacs.8b13309
日期:2019.2.27
reaction of aromatic aldehydes and arylketones with a silylboronate in the presence of a catalytic amount of a CuCl-N-heterocyclic carbene (NHC) complex and a stoichiometric amount of alkoxide base yielded cross-coupled 1,2-diol derivatives. A reaction pathway is proposed that involves the catalytic formation of a nucleophilic α-silyloxybenzylcopper(I) species from the aromatic aldehyde and its subsequent
已经实现了两种不同羰基化合物的铜催化还原偶联。在催化量的 CuCl-N-杂环卡宾 (NHC) 配合物和化学计量量的醇盐碱存在下,芳香醛和芳基酮与甲硅烷基硼酸酯的反应产生了交叉偶联的 1,2-二醇衍生物。提出了一种反应途径,包括从芳香醛催化形成亲核 α-甲硅烷氧基苄基铜 (I) 物质,然后与芳基酮偶联。该过程适用于不对称催化。这种铜催化剂体系还可以实现芳香醛和亚胺之间的还原偶联。