N-Tosyl-1,5,2,6-dithiadiazocane: a waste-free electrophilic sulfur reagent for the efficient synthesis of medium-ring S,N-heterocycles.

We report on the application of an eight-membered C2-symmetric sulfenamide derivative as a new convenient and highly reactive electrophilic sulfur-nucleophilic nitrogen synthon for the concise synthesis of medium-ring S,N-heterocyclic systems.