▎ 摘　　要

Graphene oxide (GO) in combination with NaI is used as the catalytic system for site-selective C-H sulfenylation of 1H-indole, 2-naphthol, resorcinol and 2-naphthylamines with thiols. The reaction is usually achieved in the presence of metal catalysts as well as under metal-free conditions using iodine and a strong oxidizing agent. The present protocol avoids the use of any metal catalysts, strong oxidizing agents and the use of thiols instead of other sulfur-based reagents making it atom-economic and environmentally benign. Broader tolerance to functional groups has been tested and a plausible mechanism is proposed. The recovered GO can be recycled without significant loss in catalytic activity up to four runs.