N,N'-Dimethylurea → 1,3-Dimethyl-5-(trifluoromethyl)dihydropyrimidine-2,4(1H,3H)-dione

Participants

Reaction Conditions

Reaction Steps

A mixture of α-trifluoromethylacrylic acid (4.31 g; 30.8 mmoles), 1,3-dimethylurea (2.75 g; 31.2 mmoles) and acetic anhydride (17 ml) was heated at 100° C. with stirring for one hour. The solvent was evaporated under reduced pressure, and the residue was purified by a column chromatography on silica gel (CHCl3) to give 5.50 g (yield: 84%) of 1,3-dimethyl-5-trifluoromethyldihydrouracil.

Provenance & Evidence