Diphenylprolinol Silyl Ether as a Catalyst in an Enantioselective, Catalytic Michael Reaction for the Formation of α,α-Disubstituted α-Amino Acid Derivatives
作者:Yujiro Hayashi、Kazuki Obi、Yusuke Ohta、Daichi Okamura、Hayato Ishikawa
DOI:10.1002/asia.200800394
日期:2009.2.2
Direct and enantioselective: Diphenylprolinol silyl ether was found to catalyze the direct, asymmetric Michael reaction of 4‐substituted 2‐aryl‐2‐oxazoline‐5‐one and α,β‐unsaturated aldehydes, affording the chiral α,α‐disubstituted α‐amino acid derivatives with excellent enantioselectivity.
直接和对映选择性:发现二苯基脯氨醇甲硅烷基醚可催化4-取代2-芳基2-恶唑啉5 --one和α,β-不饱和醛的直接,不对称Michael反应,从而提供手性α,α-di取代的α-具有优异对映选择性的氨基酸衍生物。