Noncompetitive NMDA Antagonists: A Novel Synthesis of 1-Phenyltetrahydro-3-benzazepines
作者:Bernhard Wünsch、Sven Nerdinger、Gerd Bauschke、Georg Höfner
DOI:10.1002/ardp.19973300705
日期:——
addition of (2‐lithiophenyl)acetaldehyde acetals, which are generated in situ upon treatment of the bromo acetals 5a,b with n‐butyllithium, to β‐nitrostyrene (6). The reductive ring closure of the nitro acetals 7a,b succeeded with zinc dust and hydrochloric acid to give the 3‐benzazepines 11a,b in good yields. The unsubstituted 3‐benzazepine 11a showed a considerable affinity for the phencyclidine binding
合成具有药理学意义的 1-苯基四氢-3-苯并氮杂骨架的关键步骤是(2-硫代苯基)乙醛缩醛的迈克尔加成,其在用正丁基锂处理溴缩醛 5a、b 后原位生成, β-硝基苯乙烯 (6)。硝基缩醛 7a、b 的还原环闭合成功地用锌粉和盐酸得到 3-苯并氮杂 11a、b,收率良好。未取代的 3-苯并氮杂 11a 对 NMDA 受体的苯环利定结合位点显示出相当大的亲和力 (Ki = 6.41 μM),而芳基部分 (11b, c) 中的供体取代基降低了对 NMDA 受体的亲和力。