Abstract
The main product from the title reaction is the enamine N-[2,2-bis(phenylsulfonyl)vinyl]-pyrrolidine, 4. Tetrakis(phenylsulfonyl)propane, 3, is a by-product, when dichloromethane is used; it is formed independently from this solvent and bis(phenylsulfonyl)methane in the presence of pyrrolidine.