Kinthada, Ghosh, De, Bhunia, Dey, and Bisai* Supporting Information S1 Supporting Information Acid-Catalyzed Reactions of 3-Hydroxy-2-oxindoles with Electron-rich Substrates: Synthesis of 2-Oxindoles with All-Carbon Quaternary Center Lakshmana K. Kinthada, Santanu Ghosh, Subhadip De, Subhajit Bhunia, Dhananjay Dey, and Alakesh Bisai* Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Transit Campus: ITI (Gas Rahat) Building, Govindpura, Bhopal, MP – 462 023, India e-Mail: alakesh@iiserb.ac.in Table of Contents Spectral traces (Scanned copies) S2-S72 Scanned Copies of Check CIF S73-S80 Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry This journal is © The Royal Society of Chemistry 2013