Dimethylformamide → HCID 19994815, compound

Participants

Reaction Steps

To a stirred solution of 25 parts of 3-methyl-2,4-imidazolidinedione in 198 parts of N,N-dimethylformamide were added portionwise 1.6 parts of a sodium hydride dispersion 50% under nitrogen atmosphere (exothermic reaction, cooling). Upon complete addition, stirring was continued for 1 hour at room temperature. 45.5 parts of 1,2-dibromoethane were added dropwise. Upon completion, the whole was stirred for 2 days at room temperature. The reaction mixture was evaporated and the residue was taken up in a mixture of water and dichloromethane. The separated organic layer was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (95:5 by volume) as eluent. The pure fractions were collected and the eluent was evaporated, yielding 35.8 parts (73.6%) of 3-(2-bromoethyl)-1-methyl-2,4-imidazolidinedione as a residue (int. 33).

Provenance & Evidence