作者:Claude Agami、Catherine Puchot
DOI:10.1016/s0040-4020(01)87620-1
日期:1986.1
Optically active octalones result from dehydration of the corresponding racemic β-ketols catalyzed by (S)-phenylalanine or (S)-proline. According to the nature of the amino acid, opposite enantioselectivities were observed during the kinetic resolutions. Catalysis by proline leads to higher enantiomeric excesses and occurs with greater discrimination between different substrates. A mechanism involving
旋光性八氢萘酮是由(S)-苯丙氨酸或(S)-脯氨酸催化的相应外消旋β-酮醇脱水制得的。根据氨基酸的性质,在动力学拆分过程中观察到相反的对映选择性。脯氨酸的催化导致更高的对映体过量,并且在不同底物之间存在更大的辨别力。涉及由氨基酸羧酸酯基团介导的分子内氢转移的机理与所观察到的选择性一致。