Process for the preparation of sulfamide derivatives

A process for the preparation of a compound of formula I

• wherein:
• R1 and R2 each independently is (C1-C12)alkyl, (C2-C6)alkenyl, (C3-C8)cycloalkyl, aryl, heteroaryl, or R1 and R2 together with the nitrogen atom to which they are attached form a 5-8 membered ring optionally substituted with one or more groups each independently selected from (C1-C12)alkyl, (C3-C8)cycloalkyl, aryl, and heteroaryl, and optionally further interrupted with one or more atoms each independently selected from —O— and —S—,
• wherein said alkyl, alkenyl, and cycloalkyl each independently is optionally interrupted with one or more groups each independently selected from —O— and —S—,
• said process comprising:
• (i) reacting a compound of formula II
• with sulfuryl chloride in a solvent, to thereby obtain a compound of formula III
• and
• (ii) reacting the compound of formula III with an ammonia-based solution, to thereby obtain the compound of formula I.