Bromopinacolone → (S)-2-{[5-(3,3-Dimethyl-2-oxo-butoxy)-1-phenyl-1H-pyrazole-3-carbonyl]-amino}-pentanedioic acid 5-tert-butyl ester 1-methyl ester

HRID 1908646Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1908646
[CH3:1][O:2][C:3](=[O:29])[C@@H:4]([NH:14][C:15]([C:17]1[CH:21]=[C:20]([OH:22])[N:19]([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[N:18]=1)=[O:16])[CH2:5][CH2:6][C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8].CC(C)([O-])C.[K+].Br[CH2:37][C:38](=[O:43])[C:39]([CH3:42])([CH3:41])[CH3:40]>CN(C=O)C>[CH3:1][O:2][C:3](=[O:29])[C@@H:4]([NH:14][C:15]([C:17]1[CH:21]=[C:20]([O:22][CH2:37][C:38](=[O:43])[C:39]([CH3:42])([CH3:41])[CH3:40])[N:19]([C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)[N:18]=1)=[O:16])[CH2:5][CH2:6][C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8]

Komponenten

5

Edukt 3

HCID 21642BromopinacoloneHCID 23665647Potassium tert-butoxideHCID 178501468HCID 178501468, Verbindung

Produkt 1

HCID 66920060(S)-2-{[5-(3,3-Dimethyl-2-oxo-butoxy)-1-phenyl-1H-pyrazole-3-carbonyl]-amino}-pentanedioic acid 5-tert-butyl ester 1-methyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Crude (S)-2-[(5-Hydroxy-1-phenyl-1H-pyrazole-3-carbonyl)-amino]-pentanedioic acid 5-tert-butyl ester 1-methyl ester (44 g) was dissolved in DMF and treated with 12.2 g potassium tert-butoxide and 14.7 ml 1-bromopinacolone. After 2 h the solvent was removed in vacuo, the residue taken up in DCM and extracted with water. The crude product obtained after evaporation of the solvent was purified by flash column chromatography on silica eluting with heptane/ethyl acetate giving the title compound as colorless oil (45 g).

Aufarbeitung

  1. customAfter 2 h the solvent was removed in vacuo
  2. extractionextracted with water

Quellen und Nachweise

ORD-Eintrag
ord-a13c9b70cec04809a99fb89fc9ce525c
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08598179B2

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