Sodium hydride → HCID 54034516, Verbindung

HRID 2225816Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2225816
[CH2:1]([O:3][C:4](=[O:14])[C:5](=[O:13])[C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[CH:8][CH:7]=1)[CH3:2].[H-].[Na+].Br[CH2:18][C:19]([N:21]1[CH2:26][CH2:25][N:24]([CH2:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][C:30]=2[C:35]([F:38])([F:37])[F:36])[CH2:23][CH2:22]1)=[O:20]>CN(C)C=O>[CH2:1]([O:3][C:4](=[O:14])[C:5](=[O:13])[C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:18][C:19](=[O:20])[N:21]2[CH2:22][CH2:23][N:24]([CH2:27][CH2:28][C:29]3[CH:34]=[CH:33][CH:32]=[CH:31][C:30]=3[C:35]([F:38])([F:36])[F:37])[CH2:25][CH2:26]2)=[CH:8][CH:7]=1)[CH3:2]

Komponenten

5

Edukt 3

HCID 24758Sodium hydrideHCID 11715332Ethyl 2-(4-hydroxyphenyl)-2-oxoacetateHCID 19004319HCID 19004319, Verbindung

Produkt 1

HCID 54034516HCID 54034516, VerbindungAusbeute 32,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

A mixture of 4-hydroxy-alpha-oxobenzeneacetic acid ethyl ester (0.256 g) in dimethylformamide (4 mL) under argon was treated with 55% sodium hydride (0.06 g), stirred for 15 minutes and then the above 1-(2-bromo-1-oxoethyl)-4-[2-[2-(trifluoromethyl)phenyl]ethyl]piperazine (0.5 g) in dimethylformamide (2 mL) was added. The mixture was stirred at room temperature for 23 hours and worked up as in Example 20. The crude product was purified by flash chromatography over silica gel (ethyl acetate-toluene; 1:1 increasing to 4:1) to afford 0.21 g of alpha-oxo-4-[2-oxo-2-[4-[2-[2-(trifiuoromethyl)phenyl]ethyl]-1-piperazinyl]ethoxy]-benzeneacetic acid ethyl ester as an oil.

Aufarbeitung

  1. stirringThe mixture was stirred at room temperature for 23 hours
  2. customThe crude product was purified by flash chromatography over silica gel (ethyl acetate-toluene; 1:1 increasing to 4:1)

Quellen und Nachweise

ORD-Eintrag
ord-43bc30f5acc046da895c0d0e52b83c26
Quelldatensatz
uspto-grants-1994_09
Patentnummer
US05344843

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