Scheme 6: Possible mechanism.

Pathway A Catalytic cycle for the synthesis of C4-carbamoylated indoles. Pathway B Mechanistic pathway for the construction of C10-aminophenanthridinones.

Pathway A Catalytic cycle for the synthesis of C4-carbamoylated indoles. Pathway B Mechanistic pathway for the construction of C10-aminophenanthridinones.