Process for preparation of sulfamoyl chloride

The process according to any of the preceding claims, wherein the organic amide is dimethylacetamide and the organic amine is triethylamine.

The process according to any of the preceding claims, wherein chlorosulfonyl isocyanate is present in an inert solvent, preferably an inert aromatic solvent, inert alkane solvent or inert halogenated solvent.

The process according to any of the preceding claims, wherein water is added as solution in an inert solvent, preferably an inert polar solvent, preferably in acetonitrile.

The process according to any of the preceding claims, wherein the amount of water is 0.5 to 1.5 mol/mol chlorosulfonyl isocyanate, preferably 0.95 to 1.05 mol/mol chlorosulfonyl isocyanate, most preferably 1 mol/mol chlorosulfonyl isocyanate.

The process according to any of the preceding claims, wherein the addition time of water in acetonitrile in the presence of the organic amide or organic amine to chlorosulfonlyl isocyanate in inert solvent is 1 hour to 8 hours, preferably 1 hour to 6 hours, more preferably 1 hour to 4 hours, most preferably 2 hours to 4 hours.

The process according to any of the preceding claims, wherein the process is used for converting a compound having structural formula (III)

• to a compound having structural formula (IV)
• wherein R represents a C1 to C20 hydrocarbon group optionally comprising one or more heteroatoms such as oxygen, nitrogen and sulfur.

Use of a compound having structural formula (I)

• for the preparation of a compound having structural formula (IVa), (IVb) or (IVc)