Hydrochloric Acid → HCID 46180545, compound

Participants

Reaction Conditions

Reaction Steps

Part A: Ethyl 2-(2-chlorophenyl)-1-(4-chlorophenyl)-5-ethyl-1H-imidazole-4-carboxylate was obtained according to WO03040107. To a magnetically stirred solution of ethyl 2-(2-chlorophenyl)-1-(4-chlorophenyl)-5-ethyl-1H-imidazole-4-carboxylate (5.80 g, 0.0149 mol) in tetrahydrofuran (40 ml) was added a solution of LiOH (0.715 g) in water (40 ml). The resulting mixture was heated at 70° C. for 16 hours. The resulting mixture was allowed to attain room temperature and subsequently treated with concentrated hydrochloric acid (3.5 ml). The tetrahydrofuran was evaporated in vacuo and the resulting mixture was stirred overnight. The formed precipitate was collected by filtration and washed with petrolaum ether (40-60) to give 2-(2-chlorophenyl)-1-(4-chlorophenyl)-5-ethyl-1H-imidazole-4-carboxylic acid (4.52 gram, 84% yield). 1H-NMR (400 MHz, CDCl3): δ 1.09 (t, J=7, 3H), 2.90 (q, J=7, 2H), 3.70 (br s, 1H), 7.12 (dt, J=8 and 2, 2H), 7.22-7.28 (m, 1H), 7.29-7.38 (m, 5H).

Provenance & Evidence