作者:Satyanarayana Gadde、Yun Cheuk Leung、Mohan Bhadbade、Belamy B. Cheung、David StC. Black、Naresh Kumar
DOI:10.1071/ch20173
日期:——
The reactivity and synthesis of new analogues of pyrido[1,2-a]benzimidazoles have been explored. Twenty-three derivatives bearing phenoxy, thiophenoxy, aniline, and aryl groups at the 1-position were successfully synthesised in 25–91 % yield, via nucleophilic substitution, Buchwald–Hartwig amination, and Suzuki coupling type processes. Solvent free synthetic protocols were employed to achieve the nucleophilic
已经研究了吡啶并[1,2- a ]苯并咪唑的新类似物的反应性和合成。通过亲核取代,Buchwald-Hartwig胺化和Suzuki偶联类型工艺,成功合成了1位上带有苯氧基,噻吩氧基,苯胺和芳基的23种衍生物,收率25-91%。采用无溶剂的合成方案,通过空间需求中间体(7a)上的供电子基团或适度吸电子基团实现苯胺的亲核取代。在这项工作期间,一个不寻常的多环杂环被鉴定为副产物:二聚双(吡啶并[1,2- a ]苯并咪唑)。