Acetonitrile → HCID 178444598, compound

Temperature

0 °C

In a three-neck 50 mL flask were successively introduced 0.70 g (0.91 mmol) of (2′R,3′S,4′S,5′R)-6-chloro-4′-(3-chloro-2-fluoro-phenyl)-2′-(2,2-dimethyl-propyl)-1′-((1R,2S)-2-hydroxy-1,2-diphenyl-ethyl)-2-oxo-1,2-dihydro-spiro[indole-3,3′-pyrrolidine]-5′-carboxylic acid (trans-4-hydroxy-cyclohexylmethyl)-amide, 7.0 mL of acetonitrile, 3.5 mL of distilled water and 3.5 mL of acetone. The resulting mixture was stirred and cooled to 0° C. and 0.99 g (1.81 mmol) of cerium ammonium nitrate was added in small portions. The reaction mixture was stirred at 0° C. for 20 minutes, upon which 89 mg (1.06 mmol) of sodium hydrogencarbonate were added and stirring was maintained for minutes. The mixture was diluted with 60 mL of ethyl acetate and decanted. The organic phase was separated and the aqueous phase was extracted twice with mL of ethyl acetate. The combined organic extracts were washed with 20 mL of water, dried with magnesium sulfate and then concentrated to dryness under reduced pressure. The residue was purified by flash chromatography on a 30 g silica cartridge (15-40 μm silica gel; eluting solvent: dichloromethane; flow: 30 mL/min) followed by a second purification by flash chromatography on a 15 g silica cartridge (15-40 μm silica gel; eluting solvent: dichloromethane/methanol/28% ammonia 97/2/1 v/v/v; flow: 30 mL/min). 87 mg of (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′-carboxylic acid (trans-4-hydroxy-cyclohexylmethyl)-amide were obtained as a white solid. mp: 192° C. (Kofler); LC-MS: tR (min)=0.84; [M+H]+: m/z 576; [M−H]−: m/z 574 (method A); 1H NMR (CHLOROFORM-d, 400 MHz): mixture of isomers: 0.90 (s, 9 H); 0.99 to 2.09 (m partially hidden, 11 H); 3.05 to 3.27 (m, 2 H); 3.59 (m, 2 H); 4.39 (d, J=8.8 Hz, 1 H); 4.59 (m, 1 H); 6.76 (s large, 1 H); 6.99 (t, J=7.8 Hz, 1 H); 7.06 to 7.56 (m, 6 H); 7.82 (t broad, J=6.1 Hz, 1 H).

1. customIn a three-neck 50 mL flask were successively introduced
2. additionwere added
3. stirringstirring
4. temperaturewas maintained for minutes
5. customdecanted
6. customThe organic phase was separated
7. extractionthe aqueous phase was extracted twice with mL of ethyl acetate
8. washThe combined organic extracts were washed with 20 mL of water
9. dry with materialdried with magnesium sulfate
10. concentrationconcentrated to dryness under reduced pressure
11. customThe residue was purified by flash chromatography on a 30 g silica cartridge (15-40 μm silica gel; eluting solvent: dichloromethane; flow: 30 mL/min)
12. customfollowed by a second purification by flash chromatography on a 15 g silica cartridge (15-40 μm silica gel; eluting solvent: dichloromethane/methanol/28% ammonia 97/2/1 v/v/v; flow: 30 mL/min)

ORD record

ord-eef452d184a644d6aaa72a49ef0c4e2e

Source dataset

uspto-grants-2014_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08680132B2