Synthesis of substituted 3-amino-4-cyano-1-oxo-1,2,5,10-tetrahydroazepino [3,4-<i>b</i>]indoles
作者:Reinhard Troschütz、Annin Hoffmann
DOI:10.1002/jhet.5570340510
日期:1997.9
suitable substituted ethyl 3-formylindole-2-carboxy-latcs 2, condensation with malononitrile (3) and subsequent sodium borohydride-reduction yielded ethyl 3-(2,2-dicyanoethyl)indole-2-carboxylates 5 and 19, respectively, which were cyclized in boiling alkoxides to 3-alkoxy-4-cyanoazepino[3,4-b]indoles 10,11,20 and 21. This sequence constitutes a novel and flexible route to functional azepino[3,4-b>]indoles
概述了在芳香核和N 10上带有取代基的3-氨基和3-二烷基氨基-4-氰基氮杂环庚烷[3,4-fc]吲哚的制备。从合适的取代的3-甲酰基吲哚-2-羧基-latcs 2开始,与丙二腈(3)缩合,然后硼氢化钠还原,分别得到3-(2,2-二氰乙基)吲哚-2-羧酸乙酯5和19,其在沸腾的醇盐中环化成3-烷氧基-4-氰基氮杂环庚烷[3,4- b ]吲哚10、11、20和21。该序列构成了向功能性azepino [3,4- b >]吲哚的新颖且灵活的途径。10、11、20的氨解用不同的胺和氨水制得的化合物21和21产生标题化合物,并对其可能的生物学活性进行了筛选。