Riboflavin-Based Photocatalysis for Aerobic Oxidative S–N Bond Formation of Thiols and Amines

A novel organophotocatalytic process using riboflavin derivatives, which allows for aerobic oxidative multistep S–S, S–N, and S–O bond formations of thiols and amines, is presented herein. The reaction proceeded under mild metal-free conditions using air (1 atm) as an environment-friendly oxidant, yielding sulfinamides and sulfonamides.