Potassium tert-butoxide → 3-(5-Bromo-4-fluoro-2-methyl-phenyl)-4-hydroxy-8-methoxy-1,8-diazaspiro[4.5]dec-3-en-2-one

HRID 1962376Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1962376
CO[C:3]([C:5]1([NH:13][C:14](=[O:25])[CH2:15][C:16]2[CH:21]=[C:20]([Br:22])[C:19]([F:23])=[CH:18][C:17]=2[CH3:24])[CH2:10][CH2:9][N:8]([O:11][CH3:12])[CH2:7][CH2:6]1)=[O:4].CC(C)([O-])C.[K+]>CN(C)C=O>[Br:22][C:20]1[C:19]([F:23])=[CH:18][C:17]([CH3:24])=[C:16]([C:15]2[C:14](=[O:25])[NH:13][C:5]3([CH2:10][CH2:9][N:8]([O:11][CH3:12])[CH2:7][CH2:6]3)[C:3]=2[OH:4])[CH:21]=1

Komponenten

4

Edukt 2

HCID 23665647Potassium tert-butoxideHCID 596145984-[2-(5-Bromo-4-fluoro-2-methyl-phenyl)-acetylamino]-1-methoxy-piperidine-4-carboxylic acid methyl ester

Produkt 1

HCID 596145973-(5-Bromo-4-fluoro-2-methyl-phenyl)-4-hydroxy-8-methoxy-1,8-diazaspiro[4.5]dec-3-en-2-one

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

To a solution of 4-[2-(5-bromo-4-fluoro-2-methyl-phenyl)-acetylamino]-1-methoxy-piperidine-4-carboxylic acid methyl ester (6.0 g) in dimethylformamide (20 ml) at 100° C. was added potassium tert-butoxide (3.23 g) and stirring continued at 100° C. for 10 minutes. The reaction mixture was quenched at room temperature by addition of acetic acid (1.64 ml), diluted with water (20 ml) and extracted with tert-butyl methyl ether (3×). The combined organic layers were washed with brine, dried over sodium sulfate and concentrated. The residue was triturated with acetonitrile, filtered and dried. Yield: 3.69 g of 3-(5-bromo-4-fluoro-2-methyl-phenyl)-4-hydroxy-8-methoxy-1,8-diaza-spiro[4.5]dec-3-en-2-one (title compound C19) as a solid, mp: 229-230° C.

Aufarbeitung

  1. customThe reaction mixture was quenched at room temperature by addition of acetic acid (1.64 ml)
  2. additiondiluted with water (20 ml)
  3. extractionextracted with tert-butyl methyl ether (3×)
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated
  7. customThe residue was triturated with acetonitrile
  8. filtrationfiltered
  9. customdried

Quellen und Nachweise

ORD-Eintrag
ord-efd8fa4acb224f978d0dfd6bff44acba
Quelldatensatz
uspto-grants-2013_04
Patentnummer
US08415369B2

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