S1 Supporting Information Photoredox Generated Vinyl Radicals: Synthesis of Bisindoles and β- Carbolines Neha Chalotra, †,§ Ajaz Ahmed, †, § Masood Ahmad Rizvi, ‡ Zakir Hussain, ‡ Qazi Naveed Ahmed † and Bhahwal Ali Shah †, * † AcSIR and Natural Product Microbes, CSIR-Indian Institute of Integrative Medicine, Jammu-180001. ‡ Department of Chemistry, University of Kashmir, Srinagar, 190006 ║ Both authors contributed equally E-mail: bashah@iiim.ac.in Table of content: (1) Pictorial representation of photochemical setup S2 (2) 18 O 2 experiment S3 (3) Luminescence quenching experiments and Stern-Volmer plots: S4 (4) Quantum yield measurements S9 (5) Plausible mechanism for formation of β-Carbolines S11 (6) Optimization tables S12 (7) Spectral data S13