Anodic Cyanation ofN-Substituted 1-Benzazepines: Synthesis of the Corresponding α-Aminonitriles
作者:Sébastien Michel、Erwan Le Gall、Jean-Pierre Hurvois、Claude Moinet、André Tallec、Philippe Uriac、Loic Toupet
DOI:10.1002/jlac.199719970137
日期:1997.1
α-Cyano-N-alkyl-1-benzazepines are obtained by electrochemical oxidation of various 1-benzazepines. Electrolyses are carried out in a flow cell, at a carbon felt anode in methanol; the supporting electrolyte is a mixture of lithium acetate and sodium cyanide. With 2,3,4,5-tetrahydrobenzazepines 2a–c and 5a–b, cyanation takes place either on the sidechain or on the seven-membered ring; with the latter
α-氰基-N-烷基-1-苯并ze庚因是通过各种1-苯并ze庚因的电化学氧化而获得的。电解在流通池中的碳毡阳极在甲醇中进行;辅助电解质是乙酸锂和氰化钠的混合物。在2,3,4,5-四氢苯并ze庚因2a–c和5a–b中,氰化作用发生在侧链或七元环上。对于后者,则为3-甲基取代的衍生物5a-b,该反应是立体定向的,仅导致反式-α-氰基化合物。对于二氢苯并ze庚因8a–b,仅会发生环氰化;该反应对2,3-二氢-1,3,5-三甲基苯并ze庚因(8a),但不适用于2,5-二氢-1,3,5-三甲基异构体(8b)。