Boron-mediated aldol reactions of ethyl α-(N,N)-dibenzylamino ketones: control of enolisation geometry and aldehyde π-facial selectivity
作者:Ian Paterson、Angela C Mackay
DOI:10.1016/s0040-4039(01)01982-7
日期:2001.12
The boron-mediated aldol reactions of a range of chiral α-(N,N)-dibenzylamino ketones with aldehydes can be controlled to provide stereodefined adducts. Complementary induction can be achieved with cHex2BCl/Me2NEt leading to preferential formation of the 1,2-anti-2,4-syn adducts, while Bu2BOTf/iPr2NEt provides 1,2-syn-2,4-anti adducts.
可以控制一系列手性α-(N,N)-二苄基氨基酮与醛的硼介导的羟醛反应,以提供立体确定的加合物。可以用c Hex 2 BCl / Me 2 NEt实现互补诱导,从而优先形成1,2-抗2,4 -syn加合物,而Bu 2 BOTf / i Pr 2 NEt提供1,2- syn -2 ,4-抗加合物。