The Enantioselective Michael Addition of Thiols to Cycloalkenones by Using (2<i>S</i>, 4<i>S</i>)-2-Anilinomethyl-1-ethyl-4-hydroxypyrrolidine as Chiral Catalyst
作者:Keisuke Suzuki、Akihiko Ikegawa、Teruaki Mukaiyama
DOI:10.1246/bcsj.55.3277
日期:1982.10
Catalytic asymmetric addition of thiols to 2-cycloalkenone was studied by using the chiral amino alcohols, derived from L-hydroxyproline or (S)-proline, as base catalysts. Detailed investigation was carried out on the effects of the structure of the catalyst, the reaction medium, the temperature, and the concentration on the enantioselectivity. Good optical yields (47–88%) were achieved by the reaction
通过使用衍生自 L-羟脯氨酸或 (S)-脯氨酸的手性氨基醇作为碱催化剂,研究了硫醇向 2-环烯酮的催化不对称加成。详细研究了催化剂结构、反应介质、温度和浓度对对映选择性的影响。通过使用催化剂 (2S, 4S)-2-anilinomethyl-1-ethyl- 在 -5 °C 下,芳烃硫醇和 2-cyclohexen-1-one 在甲苯中的反应获得了良好的光学产率(47-88%)。 4-羟基吡咯烷。