TfOH-catalyzed three-component synthesis of Dithiocarbamates from a-Diazoesters under continuous flow conditions

The synthesis of dithiocarbamates derivatives is important for their practical utilization as pharmaceuticals and for other purposes. Herein, we demonstrated the TfOH-catalyzed synthesis of dithiocarbamates via three-component reaction of alpha-diazoesters in good yields under continuous flow conditions. The reaction exhibits a wide substrate scope of diazo compounds and high functional group tolerance. This study provides a safe and mild protocol to form dithiocarbamates that complements TfOH-catalyzed S-H insertion reaction of diazo compounds and continuous flow synthesis strategies.