Abstract Depending on the conditions of hydrolysis, vicinal aromatic dicyano derivatives Ia-Ic gave anhydrides IIa-IIe and imides of 4-aryl-1-alkoxynaphthalene-2, 3-dicarboxylic acids, IIIa, b, along with products of partial hydrolysis, decarboxylation and demethylation, IVa-IVd, IVf-IVg, and derivatives of benzo (c) fluorene, Va-Vc. The derivatives Va-Vc were also obtained by acid hydrolysis of dicyano derivatives Id-Ig. Methanolysis of the anhydride IId ...
![6-ethyl-9-(4-ethylphenyl)-4-methoxybenzo[f][2]benzofuran-1,3-dione Structure](https://image.chemsrc.com/caspic/186/80466-49-5.png)
