Potassium Carbonate → Methyl 5-[4-(2,2,2-trifluoroethyl)phenyl]nicotinate

A solution of 8.00 g (33.5 mmol) of the compound from Example 40A in toluene (304 ml) was admixed under argon at RT with 10.9 g (50.2 mmol) of the compound from Example 33A in ethanol (100 ml) and 5.10 g (36.8 mmol) of potassium carbonate. After stirring for 10 min, 3.87 g (3.35 mmol) of tetrakis(triphenylphosphine)palladium and then 5.83 g (100 mmol) of potassium fluoride in water (64 ml) were added. The mixture was stirred under reflux for 8 h, and the reaction solution was cooled and diluted with ethyl acetate. The reaction solution was washed in water, and the organic phase was dried over magnesium sulphate, filtered and concentrated under reduced pressure. The residue was purified by means of column chromatography (silica gel, dichloromethane/methanol 100:1→80:1). Yield: 9.20 g (69% of theory, purity 75%)

1. stirringThe mixture was stirred
2. temperatureunder reflux for 8 h
3. temperaturethe reaction solution was cooled
4. washThe reaction solution was washed in water
5. dry with materialthe organic phase was dried over magnesium sulphate
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by means of column chromatography (silica gel, dichloromethane/methanol 100:1→80:1)

ORD-Eintrag

ord-0b285860211d4c01bd4537944af2d699

Quelldatensatz

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08440657B2