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.
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.