Kinetic Resolution of Racemic Carboxylic Acids Using Achiral Alcohols by the Promotion of Benzoic Anhydrides and Tetramisole Derivatives: Production of Chiral Nonsteroidal Anti-Inflammatory Drugs and Their Esters
作者:Isamu Shiina、Kenya Nakata、Yu-suke Onda
DOI:10.1002/ejoc.200800942
日期:2008.12
carboxylic esters were produced by kinetic resolution of racemic carboxylic acids by using achiral alcohols, benzoic anhydrides, and Birman's tetramisole-type catalysts. Bis(α-naphthyl)methanol is a very effective reagent for producing the corresponding esters with high ee values in the presence of 4-methoxybenzoic anhydride (PMBA) as the coupling reagent by promotion of benzotetramisole derivatives (BTM
通过使用非手性醇、苯甲酸酐和伯曼四甲醚型催化剂对外消旋羧酸进行动力学拆分,生产了多种光学活性羧酸酯。双(α-萘基)甲醇是一种非常有效的试剂,可在 4-甲氧基苯甲酸酐 (PMBA) 作为偶联剂的情况下,通过促进苯并四甲醚衍生物 (BTM、α-Np-BTM、和 β-Np-BTM)。该方案通过在手性催化剂的存在下利用转酰化过程从酸组分与苯甲酸酐衍生物生成混合酸酐,直接从游离羧酸和非手性醇中提供手性羧酸酯。 (© Wiley-VCH Verlag GmbH & Co. KGaA , 69451 德国魏因海姆, 2008)