作者:Shigeru Arai、Yoshiki Shirai、Toshimasa Ishida、Takayuki Shioiri
DOI:10.1016/s0040-4020(99)00213-6
日期:1999.5
Catalytic asymmetric Darzens reaction promoted by a chiral phase-transfer catalyst derived from cinchonine is described. The desired α,β-epoxy ketones were obtained by use of α-chloro acyclic and cyclic ketones as substrates with moderate to high enantiomeric excesses under mild reaction conditions. This methodology can be quite an effective protocol for practical asymmetric synthesis.
描述了由辛可宁衍生的手性相转移催化剂促进的催化不对称Darzens反应。在温和的反应条件下,以α-氯无环和环状酮为底物,对映体过量到中度到高,可以得到所需的α,β-环氧酮。对于实际的不对称合成,该方法可能是非常有效的协议。