Reactions of 1H-pyrano[3,4-c]pyran-7-ium perchlorates with ammonium acetate and amines: synthesis of 2,7-naphthyridines and pyrano[3,4-c]pyridinium salts
Аннотация:
The reaction of 1H-pyrano[3,4-c]pyran-7-ium perchlorates with ammonium acetate gives 2,7-naphthyridines, while in their reaction with primary amines pyrano[3,4-c]pyridinium salts are formed. The structure of 7-[2-(dimethylamino)ethyl]-1-ethoxy-5-methyl-3,8-diphenyl-1H-pyrano[3,4-c]pyridin-7-ium perchlorate was established by X-ray diffraction.