dilithium salt of (S)-BINOL was added as a promotor. Alkyl aryl sulfoxides resulted in up to quantitative yield and with up to 97% ee. This demonstrates the feasibility of asymmetric sulfinylations by achiral sulfinylating agents (from the perspective of Alkyl2Mg) as well as the feasibility of asymmetric sulfoxide–magnesium exchanges (from the perspective of Ar2SO).
在-78°C下,当添加1.5当量的(S)-BINOL二
锂盐作为
促进剂时,伯二烷基
镁化合物与二芳基亚砜反应。烷基芳基亚砜导致定量产率最高,ee高达97%。这证明了通过非手性亚磺化剂进行不对称亚磺酰基化的可行性(从烷基2 Mg的角度来看),以及不对称亚砜与
镁交换的可行性(从Ar 2 SO角度来看)。