Water → 2-(4-Bromo-2-methylphenyl)acetic acid

To a solution of 16A (12 g, 56.8 mmol) in CCl4 (200 mL), acetonitrile (200 mL) and water (300 mL) at rt was added ruthenium (III) chloride hydrate (1.474 g, 7.11 mmol) and sodium periodate (48.6 g, 227 mmol). The suspension was stirred vigorously for 5.0 h. The solvent was removed under vacuum. The residue was filtered though wet CELITE®, washed with EtOAc. The mixture was further extracted with EtOAc (3×400 mL). The volume of organic layers was reduced to ca 500 mL, washed with sat. sodium sulfite/with conc. HCl (pH ca 2-3). The organic layer was dried over sodium sulfate and concentrated. After evaporation of solvent, 16B (11.47 g, 50.1 mmol, 88% yield) was obtained as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 2.27 (s, 3H) 3.60 (s, 2H) 7.04 (d, J=7.91 Hz, 1H) 7.28 (dd, J=8.13, 1.98 Hz, 1H) 7.32 (s, 1H).

1. customThe solvent was removed under vacuum
2. filtrationThe residue was filtered though wet CELITE®
3. washwashed with EtOAc
4. extractionThe mixture was further extracted with EtOAc (3×400 mL)
5. washwashed with sat. sodium sulfite/with conc. HCl (pH ca 2-3)
6. dry with materialThe organic layer was dried over sodium sulfate
7. concentrationconcentrated
8. customAfter evaporation of solvent

ORD-Eintrag

ord-c7c123501fae4b4f829a461ac3c66e83

Quelldatensatz

uspto-grants-2015_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09174974B2