Method of preparing N- 4- (2 - {2- (4-methanesulfonamidophenoxy) ethyl (methyl) amino} ethyl) phenyl methanesulfonamide (Dofetilide)

摘要

Preparing 1- (4-methanesulfonamidophenoxy) -2- [N- (4-methanesulfonamidophenethyl) -N-methylamino] ethane (Dofetilide) of formula I by sulfonylation of 1- (4-aminophenoxy) -2- [N- (4-aminophenethyl) N-methylamino] ethane of formula II with N-methylsulfonyl-N'-methylimidazolium chloride of formula III.