Phosphorus oxychloride → 4-Chloro-6-(3,4-dimethoxyphenyl)-2-methylpyrimidine

HRID 4323

Reaktionsgleichung

Reaktionsgleichung von HRID 4323
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]2[N:16]=[C:15]([CH3:17])[NH:14][C:13](=O)[CH:12]=2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].P(Cl)(Cl)([Cl:21])=O>>[Cl:21][C:13]1[CH:12]=[C:11]([C:5]2[CH:6]=[CH:7][C:8]([O:9][CH3:10])=[C:3]([O:2][CH3:1])[CH:4]=2)[N:16]=[C:15]([CH3:17])[N:14]=1

Komponenten

3

Edukt 2

HCID 24813Phosphorus oxychlorideHCID 1357361743,4-Dihydro-6-(3,4-dimethoxyphenyl)-2-methylpyrimidin-4-one

Produkt 1

HCID 201522714-Chloro-6-(3,4-dimethoxyphenyl)-2-methylpyrimidine

Versuchsvorschrift

A suspension of 3,4-dihydro-6-(3,4-dimethoxyphenyl)-2-methylpyrimidin-4-one (2.4 g) in phosphorus oxychloride (20 ml) was refluxed for 2 hours, and evaporated. To the residue were added aqueous sodium bicarbonate solution and chloroform, and stirred at ambient temperature for 2 hours. The organic layer was obtained and washed with water. After evaporated, the residue was dissolved in ethyl acetate-diisopropyl ether mixture (1:6 v/v). The precipitates were filtered off, and the filtrate was evaporated to give 4-chloro-6-(3,4-dimethoxyphenyl)-2-methylpyrimidine (2.09 g).

Aufarbeitung

  1. temperaturewas refluxed for 2 hours
  2. customevaporated
  3. additionTo the residue were added aqueous sodium bicarbonate solution and chloroform
  4. customThe organic layer was obtained
  5. washwashed with water
  6. customAfter evaporated
  7. dissolutionthe residue was dissolved in ethyl acetate-diisopropyl ether mixture (1:6 v/v)
  8. filtrationThe precipitates were filtered off
  9. customthe filtrate was evaporated

Quellen und Nachweise

ORD-Eintrag
ord-6d50e5f7c65748e8bdcac9917b03d8e2
Quelldatensatz
uspto-grants-1988_02
Patentnummer
US04725600

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