title: Carbodiimide insertion into sulfonimides: one-step route to azepine derivatives via a two-atom saccharin ring expansion.
abstract: A previously unknown insertion of carbodiimides into sulfonimides enables the first one-step, two-atom expansion of the saccharin 5-membered ring into a 7-membered benzo[1,2,4]thiadiazepine, and a two-atom chain extension of a non-cyclic sulfonimide. This reaction is enhanced by copper salts, which allow it to be conducted mechanochemically, in a solvent-free manner.
authors.affiliation: Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W. H3A 0B8 Montreal, Canada. tomislav.friscic@mcgill.ca.
authors.forename: Davin
authors.initials: D
authors.lastname: Tan
authors.forename: Tomislav
authors.initials: T
authors.lastname: Friščić