S1 Supporting Information Diastereoselective Spirocyclization of Cyclic N-Sulfonyl Ketimines with Nitroalkenes via Iridium-Catalyzed Redox Neutral Cascade Reaction Aniket Mishra, Upasana Mukherjee, Writhabrata Sarkar, Sudha Lahari Meduri, Arup Bhowmik and Indubhusan Deb* Organic and Medicinal Chemistry Division, Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India Table of contents General Information S2 Table for the scope of cyclization with different catalyst loading S2-S3 Procedure for spirocyclization S3-S4 Characterization data S5-S26 Mechanistic experiments S26-S30 References S30 1 H and 13 C NMR spectra of compounds S31-S63