Potassium Carbonate → 2-Amino-4-methyl-5-(2-pyrimidinylthio)thiazole

HRID 2380627Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2380627
Cl.[NH2:2][C:3]1[S:4][C:5](Br)=[C:6]([CH3:8])[N:7]=1.[SH:10][C:11]1[N:16]=[CH:15][CH:14]=[CH:13][N:12]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[NH2:2][C:3]1[S:4][C:5]([S:10][C:11]2[N:16]=[CH:15][CH:14]=[CH:13][N:12]=2)=[C:6]([CH3:8])[N:7]=1

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 189547282-Amino-5-bromo-4-methyl-1,3-thiazole hydrochlorideHCID 178418793HCID 178418793, Verbindung

Produkt 1

HCID 157291882-Amino-4-methyl-5-(2-pyrimidinylthio)thiazoleAusbeute 58 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

A mixture of 2-amino-5-bromo-4-methylthiazole hydrochloride (1.15 g), 2-mercaptopyrimidine (0.6 g) and potassium carbonate (1.7 g) in N,N-dimethylformamide (20 ml) was heated at 90° C. for 3.5 hours with stirring. The reaction mixture was poured into ice water. The mixture was extracted with a mixture of tetrahydrofuran and ethyl acetate (1:1), washed with aqueous saturated sodium chloride and dried over magnesium sulfate. The solvent was concentrated under reduced pressure to give solid. The solid was subjected to column chromatography on silica gel (silica gel 60, 70-230 mesh; Merck: 100 g) and eluted with a mixture of chloroform and methanol (10:1). The fractions containing the objective compound were combined and concentrated under reduced pressure to give 2-amino-4-methyl-5-(2-pyrimidinylthio)thiazole (0.65 g, yield: 58.0%).

Aufarbeitung

  1. extractionThe mixture was extracted with a mixture of tetrahydrofuran and ethyl acetate (1:1)
  2. washwashed with aqueous saturated sodium chloride
  3. dry with materialdried over magnesium sulfate
  4. concentrationThe solvent was concentrated under reduced pressure
  5. customto give solid
  6. washeluted with a mixture of chloroform and methanol (10:1)
  7. additionThe fractions containing the objective compound
  8. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-5e770088d7fa430393c419d7586a246d
Quelldatensatz
uspto-grants-1994_11
Patentnummer
US05369107

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