反应详情

To a solution of 20 mg (0.039 mmol) of biphenyl imidazolyl tert-butyl ester (the title compound of Example 17) in 0.5 mL of chloroform was added 0.25 mL of TFA, and the progress of the reaction was monitored by 1H NMR. The resulting solution was stirred at room temperature for 75 min. The mixture was quenched with methanol and concentrated in vacuo. The residue was dissolved in a minimum amount of methanol and triturated with dropwise addition of methylene chloride-ether-hexane to give 15 mg (84%) of the title compound of Example 18 as a solid: mp 148°-171° C. (decomposed); 1H NMR (CD3OD) δ 0.83 (t, J=7.25 Hz, 3H), 1.10-1.60 (m, 4H), 2.68-2.95 (m, 3H), 3.13-3.35 (m, 1H), 3.48-3.60 (m, 2H), 5.80-6.0 [m (with d at 5.87, J=7.66 Hz), 2H], 7.10 (br s, 4H), 7.40-7.75 (m, 5H); HRMS. calcd for M+H: 455.2195. Found: 455.2215.

1. customThe mixture was quenched with methanol
2. concentrationconcentrated in vacuo
3. dissolutionThe residue was dissolved in a minimum amount of methanol
4. customtriturated with dropwise addition of methylene chloride-ether-hexane