Aromatization of 3,4-dihydro-β-carboline-3-qarboxylic acid and its derivatives through a carbanion intermediate : mechanistic study and use in chemical synthesis
作者:A. Previero、L-G. Barry、J. Torreilles、B. Fleury、S. Letellier、B. Maupas
DOI:10.1016/0040-4020(84)85124-8
日期:1984.1
and amide derivatives (AH2) undergo complete aromatization into corresponding β-carboline derivatives (A) by basic treatment under mild conditions. This, together with the easy obtention of 3,4-dihydro-β-carboline from the parent Nαformyltryptophan derivatives constitutes an attractive possibility to obtain complex molecules containing the β-carboline ring. The mechanism of the reaction was investigated
通过在温和的条件下进行碱性处理,将3,4-dlhydro-β-咔啉-3-羧酸,其酯和酰胺衍生物(AH 2)完全芳构化为相应的β-咔啉衍生物(A)。此,与3,4-二氢β咔啉的从父容易获得方法一起Ñ α甲酰基色氨酸衍生物构成一个有吸引力的可能性,得到含有β咔啉环的复杂分子。通过极谱法,紫外光谱法和偏光法研究了反应的机理。在碱性介质中,(AH 2)经历两个连续的平衡:第一个产生C 3碳负离子时,手性受到抑制,而第二个产生热力学上优选的C 4碳负离子其经历通过氧化途径(K”芳构一个= 2×10 -14在45℃下)。