Vinylsulfonic anhydride, method for producing same, and method for producing vinylsulfonyl fluoride

A process for producing a vinylsulfonic anhydride of general formula (1):

• where m is an integer from 0 to 3, and n is an integer from 1 to 6,
• the process comprising:
• a step (a) of mixing a vinylsulfonic acid compound of general formula (2) with an anhydridization agent:
• where m represents an integer from 0 to 3, n represents an integer from 1 to 6, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, Ag, a quaternary ammonium salt, or a quaternary phosphonium salt,
• wherein the step (a) comprising a step of separating the vinylsulfonic anhydride of general formula (1).

A process for producing a vinylsulfonyl fluoride comprising:

• a step (b) of mixing a vinylsulfonic anhydride of general formula (1) with a fluorinating agent:
• where m is an integer from 0 to 3, and n is an integer from 1 to 6,
• to prepare a reaction mixture comprising a vinylsulfonyl fluoride of general formula (3):
• where m is an integer from 0 to 3, and n is an integer from 1 to 6;
• and
• a vinylsulfonic acid compound of general formula (2):
• where m represents an integer from 0 to 3, n represents an integer from 1 to 6, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, Ag, a quaternary ammonium salt, or a quaternary phosphonium salt, and
• a step (c) of separating the vinylsulfonyl fluoride of general formula (3) and the vinylsulfonic acid compound of general formula (2), from the reaction mixture prepared in the step (b).