Triethylamine → Monoisouron

HRID 461348Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 461348
[NH2:1][C:2]1[CH:6]=[C:5]([C:7]([CH3:10])([CH3:9])[CH3:8])[O:4][N:3]=1.[CH3:11][N:12]=[C:13]=[O:14].C(N(CC)CC)C>C1C=CC=CC=1>[CH3:11][NH:12][C:13]([NH:1][C:2]1[CH:6]=[C:5]([C:7]([CH3:10])([CH3:9])[CH3:8])[O:4][N:3]=1)=[O:14]

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 12228Methyl IsocyanateHCID 1714733-Isoxazolamine, 5-(1,1-dimethylethyl)-

Produkt 1

HCID 186687MonoisouronAusbeute 91,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 241BenzeneLösungsmittel

Versuchsvorschrift

To a solution of 3-amino-5-t-butylisoxazole (16.82 g) in anhydrous benzene (140 ml), methyl isocyanate (8.90 g) and triethylamine (0.5 ml) are added. The resulting mixture is stirred at room temperature for about 8 hours, allowed to stand overnight and refluxed for 1 hour. After ice cooling, the reaction mixture is filtered to give a precipitate, which is recrystallized from ethyl acetate to give 1-methyl-3-(5-t-butyl-3-isoxazolyl)urea (21.61 g) as colorless needles melting at 187.0° to 187.5° C.

Aufarbeitung

  1. waitto stand overnight
  2. temperaturerefluxed for 1 hour
  3. filtrationAfter ice cooling, the reaction mixture is filtered
  4. customto give a precipitate, which
  5. customis recrystallized from ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-9f10bc90792247c683808aa3e7f229dd
Quelldatensatz
uspto-grants-1977_12
Patentnummer
US04062861

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