作者:Wijnand S. Faber、Johan Kok、Ben de Lange、Ben L. Feringa
DOI:10.1016/s0040-4020(01)85016-x
日期:1994.4
catalysts for the kinetic resolution, with quinine and quinidine leading to the most efficient and selective thiol additions. A remarkable dilution effect and a strong dependency on the mode of addition of reactants were observed. Optimization studies are presented of the kinetic resolution of 5-methoxy-2(5H)-furanone 2 resulting in (R)-2 or (S)-2 with enantiomeric excesses exceeding 90%. A mechanism for the
使用手性氨基醇催化芳基硫醇的1,4-加成反应,研究了外消旋5-烷氧基-2(5H)-呋喃酮的动力学拆分。使用各种丁烯内酯表明,γ-烷氧基取代基似乎对于达到高对映选择性是必不可少的,而芳基硫醇中的供电子取代基也增加了选择性。金鸡纳生物碱是用于动力学拆分的优选催化剂,奎宁和奎尼丁导致最有效和选择性的硫醇添加。观察到显着的稀释效果和对反应物添加方式的强烈依赖性。优化研究提出了动力学解析的5-甲氧基-2(5H)-呋喃酮2导致(R)-2或(S)-2对映体过量超过90%。给出了奎宁(奎尼丁)催化动力学拆分的机理。