Synthesis of Chiral Nonracemic 1-(2-Pyridinyl)ethylamines: Stereospecific Introduction of Amino Function onto the 2-Pyridinylmethyl Carbon Center
作者:Jun'ichi Uenishi、Masahiro Hamada、Sachiko Aburatani、Katsuya Matsui、Osamu Yonemitsu、Hiroshi Tsukube
DOI:10.1021/jo0491758
日期:2004.10.1
corresponding substituted amines (5) in excellent yields. Optically pure and meso triamine ligands having two pyridine rings, (S,S)-4f and meso-4f, (S,S)-9e, (S,R)-9e, and (S,S)-9f, have been prepared in stereochemically pure form by this method. Not only the substitution reaction of optically active 2 but also that of 1-(4-pyridinyl)ethyl and 1-(3-pyridinyl)ethyl methanesulfonates 11 and 14 take place stereospecifcally
描述了用各种胺对光学纯的1-(吡啶基)乙基甲磺酸盐的立体特异性取代。(R)-或(S)-1-(2-吡啶基)乙基甲磺酸盐与伯胺(包括氨基酸酯)的反应,得到N-取代的(S)-或(R)-1-(2-吡啶基)乙胺(4)具有反型构型。仲环状胺也与(R)-2反应,以优异的产率得到相应的取代胺(5)。光学纯的和内消旋具有两个吡啶环,(三胺配体S,S)- 4F和内消旋- 4F,(S,S)- 9E,(S,R)- 9E,和(S,S)- 9F,已经在立体化学纯的形式通过该方法制备。随着手性中心的反转,不仅光学活性的2的取代反应,而且甲磺酸的1-(4-吡啶基)乙基和1-(3-吡啶基)乙基的取代反应11和14都立体发生。