Sodium Hydroxide → 4-(4-Chloro-3-(dibutylcarbamoyl)-5-methyl-1H-pyrazol-1-yl)-3-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)benzoic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of ethyl 4-(4-chloro-3-(dibutylcarbamoyl)-5-methyl-1H-pyrazol-1-yl)-3-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)benzoate (930 mg, 1.61 mmol) in EtOH (5.0 mL) and THF (5.0 mL) was added 2N NaOH (4.0 mL, 8.03 mmol). The resulting reaction mixture was stirred at 40° C. for 1 h, cooled to room temperature and quenched with 6N HCl. The solution was extracted with CHCl3 (3×), and the combined organic extracts were dried over Na2SO4, filtered and concentrated in vacuo to afford the title compound (885 mg, 99%), which was used without further purification. 1H NMR (DMSO-d6, 2:1 mixture of amide rotamers) δ 8.32 (s, 0.5H), 8.14 (dd, J=8.36, 1.98 Hz, 1H), 8.07-7.98 (m, 1H), 7.83-7.72 (m, 1H), 7.28-7.06 (m, 3H), 7.03-6.93 (m, 0.5H), 4.86-4.68 (m, 0.5H), 4.65-4.47 (m, 1H), 4.42-4.24 (m, 0.5H), 3.88-3.70 (m, 0.5H), 3.66-3.34 (m, 3.5H), 3.23-3.06 (m, 1H), 3.04-2.94 (m, 1H), 2.87-2.70 (m, 2H), 2.26 (s, 2H), 2.21 (s, 1H), 1.47-1.34 (m, 0.5H), 1.33-1.06 (m, 5.5H), 1.01-0.91 (m, 2H), 0.88-0.82 (m, 3H), 0.70-0.62 (m, 3H); MS(ESI+) m/z 551.3 (M+H)+.

Provenance & Evidence