Retro-ene reaction I: Reaction of N-hydroxymethylsaccharin with benzoyl chlorides and alkyl halides

N-Benzoylsaccharins, N-(saccharinylmethyl) benzoates and N-alkylsaccharins were synthesized from N-hydroxymethylsaccharin and the corresponding benzoyl chlorides or alkyl halides under different conditions. The reaction mechanisms are also discussed.