Syntheses and reactions of N‐perfluoroalkanesulfonylimino sulfurous dichlorides

Treatment of N,N‐dichloroperfluoroalkanesulfonylamines with sulfur powder at room temperature gave the title products R_fSO₂N=SCl₂ in good yields. They reacted readily with dimethyl sulfoxide, chloral, DMF, benzophenone, and similar compounds to form to corresponding imines R_fSO₂N=YR¹R² (Y: S, C). A reaction mechanism, one involving formation of a four‐membered intermediate, is proposed. © 1999 John Wiley & Sons, Inc. Heteroatom Chem 10: 41–48, 1999