反应详情

温度

0 °C

A solution of tert-butyl 4-(3,5-dichloro-4-ethoxybenzamido)-2-methoxybenzoate (5) (55 mg, 0.13 mmol) in DCM (5 mL) was cooled to 0° C. and treated dropwise with a solution of 1 M boron trichloride in DCM (349 μL, 349 μmol). The reaction mixture was stirred at 0° C. for 1 h and then at RT for 2 h. The reaction mixture was cooled to 0° C. and water (0.5 mL) and sat. aq. NaHCO3 (2 mL) were added. The resulting white precipitate was collected by filtration and washed with water (2 mL). The solid was dried, then purified by capture and release on SAX, eluting with 5% AcOH in THF to afford 4-(3,5-dichloro-4-ethoxybenzamido)-2-hydroxybenzoic acid (AAA-057) (11 mg, 24%) as a white solid: m/z 370 [M+H]+ (ES+), 368 [M−H]− (ES−); 1H-NMR (400 MHz, DMSO-d6) δ: 10.51 (1H, s), 8.06 (2H, s), 7.76 (1H, d), 7.48 (1H, d), 7.28 (1H, dd), 4.14 (2H, q), 1.91 (1H, s), 1.40 (3H, t), 1.35 (1H, s).

1. waitat RT for 2 h
2. temperatureThe reaction mixture was cooled to 0° C.
3. filtrationThe resulting white precipitate was collected by filtration
4. washwashed with water (2 mL)
5. customThe solid was dried
6. custompurified by capture and release on SAX
7. washeluting with 5% AcOH in THF