反应详情

A solution of 311 mg (0.506 mmol) of 4-cyano-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole-2-carboxylic acid [4-(2-tert-butylsulfamoyl-ethyl)-2-(4,4-dimethyl-cyclohex-1-enyl)-phenyl]-amide (as prepared in the previous step) in CH2Cl2 (6 mL) was treated with EtOH (175 μL), anisole (80.0 μL), and TFA (1.8 mL). Additional TFA (0.5 mL each) was added at 3.5 and at 26 h. The mixture stirred at RT for a total of 48 h. MeOH (3 mL) was added, the mixture was concentrated in vacuo, and the residue was purified by RP-HPLC (C18) with 20-100% CH3CN in 0.1% TFA/H2O over 30 min to afford 70.5 mg (32%) of the title compound as a white solid: 1H-NMR (CD3OD; 400 MHz): δ 8.17 (d, 1H, J=8.0 Hz), 8.01 (s, 1H), 7.21 (dd, 1H, J=8.0, 2.0 Hz), 7.13 (d, 1H, J=2.0 Hz), 5.79-5.73 (m, 1H), 3.40-3.34 (m, 1H), 3.16-3.07 (m, 2H), 2.37-2.29 (m, 2H), 2.13-2.07 (m, 2H), 1.65-1.57 (m, 2H), 1.10 (s, 6H). Mass spectrum (ESI, m/z): Calcd. for C21H25N5O3S, 428.2 (M+H), found 428.1.

1. concentrationthe mixture was concentrated in vacuo
2. customthe residue was purified by RP-HPLC (C18) with 20-100% CH3CN in 0.1% TFA/H2O over 30 min