Synthesis of substituted 10,11-dihydro-5<i>H</i>-dibenz[<i>b,f</i>]azepines; key synthons in syntheses of pharmaceutically active compounds
作者:Tine Krogh Jørgensen、Knud Erik Andersen、Jesper Lau、Peter Madsen、Per Olaf Huusfeldt
DOI:10.1002/jhet.5570360110
日期:1999.1
out from com mercially available 2-bromotoluenes or 2-nitrotoluenes. Initial α-bromination with N-bromosuccinimide and subsequent reaction with triethylphosphite afforded the corresponding benzyl phosphonic ester deriva tives. After reaction with benzaldehyde derivatives, the expected Horner-Emmons reaction products were obtained. Hydrogenation gave the amino derivatives which were transformed into the
取代10,11-dihydro-5 H -dibenz [ b,f ]氮杂are是许多药物活性化合物(如丙咪嗪,氯丙咪嗪和地丙丙胺类似物)的合成中的关键合成子。描述了从商业上可获得的2-溴甲苯或2-硝基甲苯开始的容易的取代的10,11-二氢-5 H -dibenz [ b,f ]氮杂合成。用N初始α-溴化-溴代琥珀酰亚胺并随后与亚磷酸三乙酯反应,得到相应的苄基膦酸酯衍生物。与苯甲醛衍生物反应后,获得了预期的霍纳-埃蒙斯反应产物。氢化得到氨基衍生物,其被转化为相应的甲酰胺。在Goldberg条件[1]下,进行了最后的闭环步骤,以46-75%的产率得到了取代的10,11-dihydro-5 H -dibenz [ b,f ]氮杂s。