Abstract 2-Carbomethoxybenzoyl chloride reacted with some 5-methylamino-l-phenyl-3-R- pyrazoles to yield N-methyl-l-phenyl-3-R-pyrazol-5-yl)-2-carbomethoxybenzamides. These products were readily transformed into the corresponding acid, which in turn, refluxed in phosphorus oxychloride afforded the tricyclic system, l-phenyl-3-R-pyrazolo [3, 4-b] benzazepine-4, 9-dione.
![1,4-dimethyl-3-phenylpyrazolo[3,4-c][2]benzazepine-5,10-dione结构式](https://image.chemsrc.com/caspic/235/83451-37-0.png)
