Dimethylformamide → ethyl 1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-1H-pyrazole-4-carboxylate

HRID 350148Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 350148
Cl[CH2:2][C:3]1[CH:22]=[CH:21][C:6]([O:7][CH2:8][C:9]2[N:10]=[C:11]([C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)[O:12][C:13]=2[CH3:14])=[CH:5][CH:4]=1.[NH:23]1[CH:27]=[C:26]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH:25]=[N:24]1.C(=O)([O-])[O-].[K+].[K+].CN(C)C=O>O>[CH3:14][C:13]1[O:12][C:11]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)=[N:10][C:9]=1[CH2:8][O:7][C:6]1[CH:21]=[CH:22][C:3]([CH2:2][N:23]2[CH:27]=[C:26]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH:25]=[N:24]2)=[CH:4][CH:5]=1

Komponenten

6

Edukt 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 142179ethyl 1H-pyrazole-4-carboxylateHCID 109469404-(4-Chloromethylphenoxy)methyl-5-methyl-2-phenyloxazole

Produkt 1

HCID 23024913ethyl 1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-1H-pyrazole-4-carboxylateAusbeute 91 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

A mixture of 4-(4-chloromethylphenoxy)methyl-5-methyl-2-phenyloxazole (3.55 g), ethyl 1H-pyrazol-4-carboxylate (1.50 g), potassium carbonate (2.76 g), and N,N-dimethylformamide (25 ml) was stirred at room temperature for 24 hours. The reaction mixture was poured into water, which was extracted with ethyl acetate. The ethyl acetate layer was washed with water, then, with saturated aqueous sodium chloride solution, dried (MgSO4) and concentrated. The obtained crystals were collected by filtration, and ethyl 1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-1H-pyrazol-4-carboxylate (3.79 g, yield: 91%) was obtained. This was recrystallized from ethyl acetate-hexane. Melting point: 108–109° C.

Aufarbeitung

  1. extractionwas extracted with ethyl acetate
  2. washThe ethyl acetate layer was washed with water
  3. dry with materialwith saturated aqueous sodium chloride solution, dried (MgSO4)
  4. concentrationconcentrated
  5. filtrationThe obtained crystals were collected by filtration

Quellen und Nachweise

ORD-Eintrag
ord-3f403e91dea745cebb3b0ecc35e279f5
Quelldatensatz
uspto-grants-2007_02
Patentnummer
US07179823B1

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