The base-catalysed reaction of dimethyl 4-chloromethyl-1, 4-dihydro-2, 6-dimethylpyridine- 3, 5-dicarboxylate to derivatives of both 4H-and 3H-azepines can be reversed by hydrochloric acid. Dimethyl 2, 7-dimethyl-3H-azepine-3, 6-dicarboxylate rearranges to methyl (5-methoxycarbonyl-2, 6-dimethyl-3-pyridyl) acetate under the action of either sodium methoxide or mineral acids. With ethanolic hydrochloric acid, two other products have ...
![2-[(2-chloro-6-fluorophenyl)methylsulfanyl]-3-(4-methoxyphenyl)-5H-pyrimido[5,4-b]indol-4-one Structure](https://image.chemsrc.com/caspic/287/6238-07-9.png)