Hydrochloric Acid → rac-3-butoxy-4-{[(2'S,3'R,4'S,5'R)-6-chloro-4'-(3-chloro-2-fluoro-phenyl)-2'-(2,2-dimethyl-propyl)-2-oxo-1,2-dihydro-spiro[indole-3,3'-pyrrolidine]-5'-carbonyl]amino}-benzoic acid

To a solution of rac-3-butoxy-4-{[(2′S,3′R,4′S,5′R)-6-chloro-4′-(3-chloro-2-fluoro-phenyl)-2′-(2,2-dimethyl-propyl)-2-oxo-1,2-dihydro-spiro[indole-3,3′-pyrrolidine]-5′-carbonyl]-amino}-benzoic acid methyl ester (0.13 g, 0.19 mmol) in MeOH (3 mL) and THF (9 mL) was added an aqueous solution (1N) of NaOH (6 mL, 6 mmol). The reaction mixture was stirred at room temperature for 18 h. The crude mixture was diluted with water (5 mL), and acidified to “pH” 5-6 by dilute aqueous HCl solution. The mixture was then extracted with ethyl acetate three times. The combined organic extract was washed with water, brine, dried over MgSO4, and concentrated. The residue was triturated with dichlormethane and hexanes to give rac-3-butoxy-4-{[(2′S,3′R,4′S,5′R)-6-chloro-4′-(3-chloro-2-fluoro-phenyl)-2′-(2,2-dimethyl-propyl)-2-oxo-1,2-dihydro-spiro[indole-3,3′-pyrrolidine]-5′-carbonyl]amino}-benzoic acid as a light brown solid (Yield, 0.12 g, 94%).

1. extractionThe mixture was then extracted with ethyl acetate three times
2. extractionThe combined organic extract
3. washwas washed with water, brine
4. dry with materialdried over MgSO4
5. concentrationconcentrated
6. customThe residue was triturated with dichlormethane and hexanes
7. customto give

ORD-Eintrag

ord-fe2bbc7b083a48c08bb85f566287a330

Quelldatensatz

uspto-grants-2012_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08088815B2