Asymmetric Catalytic Enantio- and Diastereoselective Boron Conjugate Addition Reactions of α-Functionalized α,β-Unsaturated Carbonyl Substrates
作者:Jian-Bo Xie、Siqi Lin、Shuo Qiao、Guigen Li
DOI:10.1021/acs.orglett.6b01998
日期:2016.8.5
established for the asymmetric boron conjugate addition of B2pin2 onto α-functionalized (involving C, N, O, and Cl) α,β-unsaturated carbonyls under mild, neutral conditions involving Cu[(S)-(R)-ppfa]Cl, AgNTf2, and alcohols. The dual additives of AgNTf2 and alcohols were found to play crucial roles for achieving high catalytic activity and enantio- and diastereoselectivity (up to 98% ee and 70:1 dr).
已经建立了一种有效的催化体系,用于在温和的中性条件下,在涉及Cu [(S)的温和中性条件下,将B 2 pin 2的不对称硼共轭加成到α-官能化(涉及C,N,O和Cl)的α-β-不饱和羰基上。-(R)-ppfa] Cl,AgNTf 2和醇。发现AgNTf 2和醇的双重添加剂在实现高催化活性以及对映和非对映选择性(至多98%ee和70:1 dr)方面起着至关重要的作用。