1,2-Dimethoxyethane → 4-(Chloromethyl)-5-methyl-2-(4-methylphenyl)-1,3-oxazole

HRID 1984961Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1984961
Cl.[CH3:2][C:3]1[N+:4]([O-])=[C:5]([C:9]2[CH:14]=[CH:13][C:12]([CH3:15])=[CH:11][CH:10]=2)[O:6][C:7]=1[CH3:8].CS([Cl:21])(=O)=O.COCCOC>ClCCl>[Cl:21][CH2:2][C:3]1[N:4]=[C:5]([C:9]2[CH:14]=[CH:13][C:12]([CH3:15])=[CH:11][CH:10]=2)[O:6][C:7]=1[CH3:8]

Komponenten

5

Edukt 3

HCID 80711,2-DimethoxyethaneHCID 31297Methanesulfonyl chlorideHCID 198887574,5-Dimethyl-2-(4-methylphenyl)oxazole N-Oxide Hydrochloride

Produkt 1

HCID 50764854-(Chloromethyl)-5-methyl-2-(4-methylphenyl)-1,3-oxazole

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Reaktionsbedingungen

Temperatur
15 °C

Versuchsvorschrift

32.8 g (137 mmol) of 4,5-dimethyl-2-p-tolyloxazole 3-oxide hydrochloride were suspended in 165 ml of dichloromethane. 17.5 g (151 mmol) of methanesulfonyl chloride were added. The reaction was stirred at reflux up to full conversion (HPLC). Subsequently, 200 ml of ethylene glycol dimethyl ether were added, and the dichloromethane was distilled off under reduced pressure. The reaction mixture was cooled to 15° C. and 250 ml of water were added. The mixture was stirred at 15° C. for 1 hour. The precipitated product was isolated by filtration with suction, washed with water and dried at elevated temperature under reduced pressure.

Aufarbeitung

  1. temperatureat reflux up to full conversion (HPLC)
  2. distillationthe dichloromethane was distilled off under reduced pressure
  3. addition250 ml of water were added
  4. stirringThe mixture was stirred at 15° C. for 1 hour
  5. customThe precipitated product was isolated by filtration with suction
  6. washwashed with water
  7. customdried at elevated temperature under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-06412c0a6737454eb9cf15939ab490f3
Quelldatensatz
uspto-grants-2009_06
Patentnummer
US07544809B2

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