Trifluoroacetic acid → 4-Cyano-1H-imidazole-2-carboxylic acid [4-(1-cyano-cyclohexyl)-2-(4,4-dimethyl-cyclohex-1-enyl)-phenyl]-amide

Participants

Reaction Steps

A solution of 4-cyano-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole-2-carboxylic acid [4-(1-cyano-cyclohexyl)-2-(4,4-dimethyl-cyclohex-1-enyl)-phenyl]-amide (66.0 mg, 0.118 mmol, as prepared in the previous step) in CH2Cl2 (6 mL) was treated with EtOH (3 drops) and TFA (0.8 mL) at RT for 2 h. Solvents were evaporated in vacuo. Purification of the residue by RP-HPLC (C18) with 20-80% CH3CN in 0.1% TFA/H2O over 25 min afforded the title compound (25.7 mg, 43%) as a white solid. 1H-NMR (CD3OD; 400 MHz): δ 8.20 (d, 1H, J=8.8 Hz), 7.93 (s, 1H), 7.37 (dd, 1H, J=8.8, 2.0 Hz), 7.26 (d, 1H, J=2.0 Hz), 5.73-5.67 (m, 1H), 2.29-2.21 (m, 2H), 2.08-1.98 (m, 4H), 1.88-1.68 (m, 6H), 1.58-1.50 (m, 2H), 1.02 (s, 6H). Mass spectrum (ESI, m/z): Calcd. for C26H29N5O, 428.2 (M+H), found 428.2.

Provenance & Evidence