Ethanol → 5-{[Cyclohexyl(5-fluoro-3-methyl-1-benzofuran-2-yl)methyl]amino}pyridine-2-carboxylic acid

To a mixture of methyl 5-{[cyclohexyl(5-fluoro-3-methyl-1-benzofuran-2-yl)methyl]amino}pyridine-2-carboxylate (909 mg) synthesized above, ethanol (20 mL) and tetrahydrofuran (20 mL) was added 1N aqueous sodium hydroxide solution (20 mL), and the mixture was stirred with heating under reflux for 5 hr, and concentrated under reduced pressure. 1N Hydrochloric acid (20 mL) was added to the residue, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was washed with hexane to give the title object compound (751 mg, 86%) as a pale-brown solid.

1. temperaturewith heating
2. temperatureunder reflux for 5 hr
3. concentrationconcentrated under reduced pressure
4. addition1N Hydrochloric acid (20 mL) was added to the residue
5. extractionthe mixture was extracted with ethyl acetate
6. washThe extract was washed with saturated brine
7. dry with materialdried over magnesium sulfate
8. concentrationconcentrated under reduced pressure
9. washThe residue was washed with hexane

ORD record

ord-08ca101e0e9a49cab2819c8af3c2b6c8

Source dataset

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08436043B2