Реакция #84064

Уравнение реакции

3-chloro-4-(6-methoxyquinolin-2-yl)benzoic acid

AlCl3

→

3-chloro-4-(6-hydroxyquinolin-2-yl)benzoic acid

Выход 18.0%

Растворители

CH2Cl2

Условия реакции

Обработка

1. 1
   ТемператураThe reaction mixture was refluxed overnight
2. 2
   ДругоеThe mixture was quenched with saturated NH4Cl (10 mL)
3. 3
   Экстракцияthe aqueous layer was extracted with CH2Cl2/MeOH (v/v=10:1, 30 mL×3)
4. 4
   ПромывкаThe combined organic layer was washed with brine
5. 5
   Сушкаdried over Na2SO4
6. 6
   Фильтрацияfiltered
7. 7
   Концентрированиеconcentrated
8. 8
   Другоеto give the crude product, which
9. 9
   Другоеwas purified by prep-HPLC (0.1% TFA as additive)

Методика

To a suspension of 3-chloro-4-(6-methoxyquinolin-2-yl)benzoic acid (150 mg, 0.479 mmol) in anhydrous CH2Cl2 (5 mL) was added AlCl3 (320 mg, 2.40 mmol). The reaction mixture was refluxed overnight. The mixture was quenched with saturated NH4Cl (10 mL) and the aqueous layer was extracted with CH2Cl2/MeOH (v/v=10:1, 30 mL×3). The combined organic layer was washed with brine, dried over Na2SO4, filtered, and concentrated to give the crude product, which was purified by prep-HPLC (0.1% TFA as additive) to give 3-chloro-4-(6-hydroxyquinolin-2-yl)benzoic acid (25 mg, yield 18%). 1H NMR (DMSO, 400 MHz): δ 10.20 (brs, 1H), 8.30 (d, J=8.4 Hz, 1H), 8.10-8.00 (m, 2H), 7.95 (d, J=9.2 Hz, 1H), 7.80 (d, J=8.0 Hz, 1H), 7.72 (d, J=8.8 Hz, 1H), 7.38 (dd, J=6.4, 2.8 Hz, 1H), 7.22 (d, J=2.4 Hz, 1H), MS (ESI): m/z 299.9 [M+H]+.

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