反应详情

To a solution of methyl 4-(4-(dibutylcarbamoyl)-1-methyl-1H-imidazol-2-yl)-3-(1,2,3,4-tetrahydroisoquinoline-2-carbonyl)benzoate (65 mg, 0.12 mmol) in mixed solvents (THF/MeOH/H2O; 2:2:1; 5 mL) was added LiOH H2O (15 mg, 0.36 mmol) at 0° C. The reaction mixture was allowed to room temperature over 30 min. and stirring was continued for 1 h. The reaction mixture was concentrated to give crude product, which was diluted with water and extracted with MTBE. The aqueous layer was neutralized with 0.5N HCl and extracted with DCM (3×). The combined organic layer was dried over Na2SO4 and concentrated in vacuo to give the title compound (55 mg, 87%). 1H NMR (CD3OD, 1:1 mixture of amide rotamers) δ 8.28 (dd, J=8.0, 1.6 Hz, 1H), 8.14 (s, 1H), 7.77 (dd, J=13.6, 8.4 Hz, 1H), 7.63 (s, 0.5H), 7.51 (s, 0.5H), 7.23-7.13 (m, 3.5H), 6.95 (d, J=9.2 Hz, 0.5H), 4.79 (s, 1H), 4.48 (s, 1H), 3.77 (s, 1.5H), 3.68 (s, 1.5H), 3.58-3.01 (m, 6H), 2.88-2.80 (m, 2H), 1.60-1.40 (m, 2H), 1.39-1.20 (m, 4H), 1.19-1.00 (m, 2H), 0.99-0.90 (m, 3H), 0.85-0.75 (m, 3H); MS(ESI+) m/z 517.4 (M+H)+.

1. waitwas continued for 1 h
2. concentrationThe reaction mixture was concentrated
3. customto give crude product, which
4. extractionextracted with MTBE
5. extractionextracted with DCM (3×)
6. dry with materialThe combined organic layer was dried over Na2SO4
7. concentrationconcentrated in vacuo