Potassium Hydroxide → (2R)-4-(5-Fluoro-4-iodo-2-oxopyridin-1(2H)-yl)-2-methyl-2-(methylsulfonyl)butanoic acid

HRID 468624

Reaktionsgleichung

[OH-].[K+].[F:3][C:4]1[C:5]([I:24])=[CH:6][C:7](=[O:23])[N:8]([CH2:10][CH2:11][C@@:12]([CH3:22])([S:18]([CH3:21])(=[O:20])=[O:19])[C:13]([O:15]CC)=[O:14])[CH:9]=1>CC1CCCO1.O.[OH-].[Na+]>[F:3][C:4]1[C:5]([I:24])=[CH:6][C:7](=[O:23])[N:8]([CH2:10][CH2:11][C@@:12]([CH3:22])([S:18]([CH3:21])(=[O:20])=[O:19])[C:13]([OH:15])=[O:14])[CH:9]=1

Komponenten

Reaktionsbedingungen

Temperatur: 70 °C

Versuchsvorschrift

Potassium hydroxide (669 mg, 7.7 mmol) was added to a solution of ethyl (2R)-4-(5-fluoro-4-iodo-2-oxopyridin-1(2H)-yl)-2-methyl-2-(methylsulfonyl)butanoate (691 mg, 1.55 mmol) in 2-methyltetrahydrofuran:water (2:1 22.5 mL) and the solution was stirred at 70° C. for 2 h. The reaction was diluted with 1 N aq NaOH (50 mL). The organics were separated and the aqueous layer was washed with EtOAc (2×50 mL), and acidified to a pH of 3 using 3 M aqueous HCl. The aqueous layer was extracted with EtOAc (3×60 mL), dried (MgSO4), filtered and concentrated to afford a yellow-white solid (290 mg, 44.8%). MS (LCMS) m/z 418.0. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.53 (s, 3H) 2.08-2.20 (m, 1H) 2.36-2.48 (m, 1H) 3.13 (s, 3H) 3.79-4.02 (m, 2H) 7.03 (d, J=6.05 Hz, 1H) 7.96 (d, J=4.29 Hz, 1H) 13.82 (br. s., 1H).

Aufarbeitung

customThe organics were separated
washthe aqueous layer was washed with EtOAc (2×50 mL)
extractionThe aqueous layer was extracted with EtOAc (3×60 mL)
dry with materialdried (MgSO4)
filtrationfiltered
concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag: ord-0e53d6605acd4200b3d085ba9b5bb129
Quelldatensatz: uspto-grants-2014_01
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08624034B2

Verknüpfte Notizen

Wird geladen…