Nickel-Catalyzed Enantioselective Cross-Couplings of Racemic Secondary Electrophiles That Bear an Oxygen Leaving Group
作者:Alexander J. Oelke、Jianwei Sun、Gregory C. Fu
DOI:10.1021/ja300031w
日期:2012.2.15
date, effective nickel-catalyzed enantioselective cross-couplings of alkyl electrophiles that bear oxygen leaving groups have been limited to reactions of allylic alcohol derivatives with Grignard reagents. In this Communication, we establish that, in the presence of a nickel/pybox catalyst, a variety of racemic propargylic carbonates are suitable partners for asymmetric couplings with organozinc reagents
迄今为止,带有氧离去基团的烷基亲电试剂的有效镍催化对映选择性交叉偶联仅限于烯丙醇衍生物与格氏试剂的反应。在本通讯中,我们确定,在镍/pybox 催化剂的存在下,各种外消旋炔丙碳酸酯是与有机锌试剂不对称偶联的合适伙伴。该方法与一系列官能团兼容并使用市售催化剂组分。开发一种多功能的镍催化对映选择性交叉偶联过程,用于带有除卤化物以外的离去基团的亲电试剂,为这些反应的范围增加了一个重要的新维度。