Sodium hydride → 2-Bromo-N-Methylsulfonylacetamide

Participants

Reaction Steps

Sodium hydride (1.68 g×60% ) was added to a stirred solution of methanesulfonamide (2.0 g) in dry tetrahydrofuran (20 ml) at room temperature. The resulting solution was stirred at room temperature for 1 hour, as which time it was treated with a solution of bromoacetyl bromide (4.2 g) in dry tetrahydrofuran (10 ml). After 1 hour the solvent was removed under reduced pressure and the residue taken up in water and acidified to pH3. The acidic solution was extracted into ethyl acetate, dried (MgSO4), filtered and the solvent removed under reduced pressure. Recrystallisation from isopropanol afforded the product as white needles: mp 112°-114° C.

Provenance & Evidence