N-methyl-2-pyrrolidone → HCID 14450289, compound

Participants

Reaction Steps

To a stirred solution of 1-(4-amino-3-bromo-5-trifluoromethylphenyl)-2,4-dimethylimidazole (4.61 g) in 1methyl-2-pyrrolidone (50 cm3) was added cuprous cyanide (3.7 g) and the mixture was heated at 150° for 2 days. The mixture was then cooled and the solvent evaporated in vacuo. A solution of ammonia in water (100 cm3, s.g. 0.88) was added and the aqueous phase was extracted with chlororform:methanol, 20:1 (3×100 cm3). The combined organic extracts were dried (MgSO4), filtered and evaporated. The residue was chromatographed on silica (Merck "MK 60.9385" [Trade Mark]) eluting with chloroform:methanol, 50:1. Combination and evaporation of appropriate fractions gave a solid which was recrystallised from methanol/ethyl acetate to give microcrystals of 1-(4-amino-3-cyano-5-trifluoromethylphenyl)-2,4-dimethylimidazole, (1.1 g), m.p. 208°-10°.

Provenance & Evidence