Fig. 8
From: External oxidant-free electrooxidative [3 + 2] annulation between phenol and indole derivatives
Proposed reaction mechanism. Tentative reaction mechanism involves anode oxidation of phenol to generate phenol radical and N-acetylindole to generate indole cation radical, cross-coupling of phenoxy radical with indole cation radical, intramolecular cyclization and deprotonation to furnish the final product
