作者:Eric Brown、Alain Daugan
DOI:10.1016/0040-4020(89)80041-9
日期:1989.1
following two lactones were obtained in both (R)-(+) and (S)-(−) enantiomeric forms, β-piperonyl- and β-veratryl-γ-butyrolactones and respectively. These lactones were used as key-intermediates for the syntheses of 17 optically active lignans and lignoids, such as (-1-dimethylmatairesinol (−)-, (−)-kusunokinin (−)- and (+)-diniethylisolariciresinol (+)-.
描述了导致光学活性的β-苄基-γ-丁内酯的简单而有效的途径。因此,由Stobbe与适当的芳族醛缩合,然后催化氢化中间体α-亚苄基半琥珀酸酯而得到的(R,S)-α-苄基双琥珀酸甲酯,通过手性碱(麻黄碱或α-乙胺基)。使用硼氢化钙还原每种对映异构体,然后得到相应的旋光性β-苄基-γ-丁内酯。以此方式,以(R)-(+)和(S)-(-)对映体形式获得以下两个内酯,β-哌啶基-和β-藜芦基-γ-丁内酯和分别。这些内酯用作合成17种旋光性木脂素和木质素的关键中间体,例如(-1-二甲基麦芽甾醇(-)- ,(-)-苦参素(-)-和(+)-二乙基异芳基树脂(+)- 。