Convenient synthesis and reactions of some 7,9-dimethylthieno-[2,3-<i>b</i>:4,5-<i>b</i>‘]dipyridines
作者:Adel M. Kamal El-Dean、Gehan Ahmed Ali Micky、Abo Bakr Abdel-Hadi Ahmed、Rasha Hassan Ahmed
DOI:10.3184/030823409x12532880131016
日期:2009.10
3-Amino-4,6-dimethylthieno[2,3-b]pyridine-2-carboxaldehyde was prepared and from it various functionalised thieno[2,3-b:4,5-b‘]dipyridines were synthesised, using the Friedländer and related reactions. Ethyl 2,7,9-trimethylthieno[2,3-b:4,5-b‘]dipyridine-3-carboxylate was transformed into a variety of thieno[2,3-b:4,5-b‘]dipyridine systems with heterocyclic rings attached at C-3 or fused at C2–C3.
制备 3-氨基-4,6-二甲基噻吩并[2,3-b]吡啶-2-甲醛,并从中合成各种功能化的噻吩并[2,3-b:4,5-b']二吡啶,使用 Friedländer和相关反应。乙基 2,7,9-trimethylthieno[2,3-b:4,5-b']dipyridine-3-carboxylate 转化为多种噻吩并 [2,3-b:4,5-b']dipyridine 体系在 C-3 连接或在 C2-C3 稠合的杂环。