Benzoic Acid → HCID 53897613, compound

Solid 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (2.01 g) was added to a stirring solution of (2R)-1-(tert-butyldimethylsilyloxy)-4-(3-pyridyl)-2-butanol (1.97 g), benzoic acid (1.28 g) and 4-dimethylaminopyridine (0.85 g) in dichloromethane (50 ml) and the resulting solution stirred at room temperature for 20 hours. The solution was then concentrated under reduced pressure and the residue dissolved in acetonitrile (30 ml). Aqueous hydrofluoric acid (40%, 3 ml) was added and the mixture stirred for 30 minutes before being poured into saturated aqueous sodium bicarbonate solution (200 ml). The mixture was extracted with ethyl acetate, the combined extracts dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography over silica eluting with ethyl acetate to give the sub-title compound as a solid (1.8 g).

1. concentrationThe solution was then concentrated under reduced pressure
2. dissolutionthe residue dissolved in acetonitrile (30 ml)
3. additionAqueous hydrofluoric acid (40%, 3 ml) was added
4. stirringthe mixture stirred for 30 minutes
5. additionbefore being poured into saturated aqueous sodium bicarbonate solution (200 ml)
6. extractionThe mixture was extracted with ethyl acetate
7. dry with materialthe combined extracts dried over anhydrous magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure
10. customThe residue was purified by column chromatography over silica eluting with ethyl acetate

ORD record

ord-d81e0fca4aaf4eafa902abd3abfa2cbd

Source dataset

uspto-grants-1999_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05977105