Racemic and diastereoselective synthesis of aryl and heteroaryl tetrahydroisoquinolines<i>via</i>the pictet-spengler reaction
作者:Sylvain Aubry、Stéphane Pellet-Rostaing、Marc Lemaire、René Faure
DOI:10.1002/jhet.5570430121
日期:2006.1
synthesized by the Pictet-Spengler reaction. Influence of a wide range of aryl and heteroaryl aldehydes, was investigated in the cyclization step with 3,4-dimethoxyphenylethylamine 1, L-DOPA 2 and L-3,4-dimethoxyphenylalanine methyl ester 3. Compounds 2 and 3 served as probes to assess the efficiency of two Pictet-Spengler reactions with respect to their diastereoselectivity, in order to obtain optically
通过Pictet-Spengler反应合成了新的四氢异喹啉。在3,4-二甲氧基苯基乙胺1,L-DOPA 2和L-3,4-二甲氧基苯基丙氨酸甲酯3的环化步骤中,研究了广泛范围的芳基和杂芳基醛的影响。为了获得旋光性非对映异构体,化合物2和3用作评估两个Pictet-Spengler反应相对于其非对映选择性的效率的探针。顺式和反式-非对映异构体在短反应时间内获得,分离产率中等至良好(20-79%)。核磁共振和X射线分析均证实了预期的非对映异构体构型。