Dimethylformamide dimethyl acetal → N-[3-[3-(dimethylamino)-1-oxo-2-propenyl]phenyl]-N-methyl-methanesulfonamide

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Reaction Steps

1.58 g (6.96 mmol) of N-(3-acetyl-phenyl)-N-methyl-methanesulfonamide were dissolved in 15 ml of N,N-dimethylformamide dimethylacetal and the resultant solution was refluxed for 18 hours. The excess of volatile reagent was removed by reduced pressure distillation to yield a crude which was chromatographied over silica gel using a gradient of ethyl acetate/methanol as eluent. 1.12 g of N-[3-[3-(dimethylamino)-1-oxo-2-propenyl]phenyl]-N-methyl methanesulfonamide as a yellowish-white solid were obtained (yield 88.6%).

Provenance & Evidence