Methanol → HCID 59761148, Verbindung

The methyl 3-[5-(dimethylcarbamoyl)pyrazin-2-yl]oxy-5-[(3S)-1-methyl-2-oxo-pyrrolidin-3-yl]oxy-benzoate (Intermediate 46) (772 mg, 1.86 mmol) was dissolved in THF (9 mL) and methanol (3 mL) and lithium hydroxide solution (1N, 2.2 mL) was added followed by water (25 mL). The resulting mixture was stirred for 1 hour at room temperature. The majority of the organic solvent was removed by distillation under reduced pressure. The remaining aqueous solution was extracted with ethyl acetate (10 mL) then acidified with 2N citric acid and re-extracted with ethyl acetate (5×25 mL), the combined organic extracts were washed with water (10 mL) and brine (20 mL), dried (MgSO4) and evaporated to afford the product (716 mg, 96%). 1H NMR δ (300 MHz, CDCl3) 2.13-2.27 (m, 1H), 2.55-2.69 (m, 1H), 2.96 (s, 3H), 3.17 (d, 6H), 3.35-3.58 (m, 2H), 4.98 (t, 1H), 7.10 (s, 1H), 7.45 (s, 1H), 7.63 (s, 1H), 8.36 (s, 1H), 8.53 (s, 1H); m/z 401 (M+H+).

1. customThe majority of the organic solvent was removed by distillation under reduced pressure
2. extractionThe remaining aqueous solution was extracted with ethyl acetate (10 mL)
3. extractionre-extracted with ethyl acetate (5×25 mL)
4. washthe combined organic extracts were washed with water (10 mL) and brine (20 mL)
5. dry with materialdried (MgSO4)
6. customevaporated

ORD-Eintrag

ord-314f067f464e457db53d9fc2c2ba1a6a

Quelldatensatz

uspto-grants-2011_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07902200B2