Abstract 1, 3-Bis-trimethylsilyloxy substituted isobenzofurane (isolated as dimer 3) and isoindoles (isolated as addition products with maleic imide and dibenzoyl ethene) could be prepared by the electrochemical reduction of substituted phthalic anhydrides and phthalic imides in the presence of chlorotrimethylsilane.
![9-anilino-4-hydroxy-2-phenylbenzo[f]isoindole-1,3-dione Structure](https://image.chemsrc.com/caspic/348/80522-62-9.png)
