Abstract A number of novel thieno [2, 3-b] pyridines were prepared from the reaction of 1 with unsaturated haloalkanes, and by the reaction of the amino ketones 9 and 10 with DMF dimethylacetal or triethyl orthoformate. The synthesis of novel thieno [2, 3-c] and [3, 2-c] pyridines, and a thieno [2, 3-b; 4, 5-b'] dipyridine are also reported.
![1-(3-Aminothieno[2,3-b]pyridin-2-yl)ethanone结构式](https://image.chemsrc.com/caspic/278/52505-41-6.png)
