Kinetic Resolution of Racemic 2-Hydroxy-γ-butyrolactones by Asymmetric Esterification Using Diphenylacetic Acid with Pivalic Anhydride and a Chiral Acyl-Transfer Catalyst
作者:Kenya Nakata、Kouya Gotoh、Keisuke Ono、Kengo Futami、Isamu Shiina
DOI:10.1021/ol303453j
日期:2013.3.15
Various optically active 2-hydroxy-γ-butyrolactone derivatives are produced via the kinetic resolution of racemic 2-hydroxy-γ-butyrolactones with diphenylacetic acid using pivalic anhydride and (R)-benzotetramisole ((R)-BTM), a chiral acyl-transfer catalyst. Importantly, the substrate scope of this novel protocol is fairly broad (12 examples, s-value; up to over 1000). In addition, we succeeded in
使用新戊酸酐和(R)-苯并四咪唑((R)-BTM),手性酰基-转移催化剂。重要的是,该新颖方案的底物范围相当广泛(12个例子,s值;最大超过1000)。此外,我们通过理论计算成功地揭示了提供高对映选择性的反应机理,并阐述了2-羟基内酯在C-3位置的取代基效应。