Diethyl (ethoxymethylene)malonate → HCID 178450108, Verbindung

HRID 1195613Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1195613
Cl.[CH2:2]([O:6][C:7]1[CH:15]=[CH:14][C:10]([C:11]([NH2:13])=[NH:12])=[CH:9][CH:8]=1)[CH2:3][CH2:4][CH3:5].C([O:18][CH:19]=[C:20]([C:26](OCC)=O)[C:21]([O:23][CH2:24][CH3:25])=[O:22])C.C[O-].[Na+].CO.[Na]>CO>[CH2:24]([O:23][C:21]([C:20]1[C:19]([OH:18])=[N:12][C:11]([C:10]2[CH:14]=[CH:15][C:7]([O:6][CH2:2][CH2:3][CH2:4][CH3:5])=[CH:8][CH:9]=2)=[N:13][CH:26]=1)=[O:22])[CH3:25]

Komponenten

6

Edukt 4

HCID 6871Diethyl (ethoxymethylene)malonateHCID 3015453Benzamidine, p-butoxy-, monohydrochloride2×HCID 5360545SodiumHCID 23694274Sodium methanolate methanol

Produkt 1

HCID 178450108HCID 178450108, VerbindungAusbeute 69,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel2×

Versuchsvorschrift

4-Butyloxybenzamidine hydrochloride (II) (22.9 g, 0.1 mol) and diethyl ethoxymethylenemalonate (III) (23.8 g, 0.1 mol) were suspended in methanol (100 ml), followed by agitating the suspension while keeping it at 10° C., dropwise adding a sodium methoxide-methanol solution, separately prepared by reacting sodium (2.5 g, 0.11 mol) with methanol (200 ml), then agitating the mixture for 2.5 hours, distilling off methanol under reduced pressure, gradually adding 6N-hydrochloric acid till the solution reached a pH of 4, filtering the resulting white precipitate, washing the precipitate with a small quantity of methanol and drying the precipitate to obtain ethyl-2-(4-butyloxyphenyl)-4-hydroxy-5-pyrimidinecarboxylate (IV) (21.9 g) (yield: 69% based on compound (II)).

Aufarbeitung

  1. customat 10° C.
  2. customseparately prepared
  3. stirringagitating the mixture for 2.5 hours
  4. distillationdistilling off methanol under reduced pressure
  5. additiongradually adding 6N-hydrochloric acid till the solution
  6. filtrationfiltering the resulting white precipitate
  7. washwashing the precipitate with a small quantity of methanol
  8. customdrying the precipitate

Quellen und Nachweise

ORD-Eintrag
ord-b4776067836c483d8a8a14b6c5de21f1
Quelldatensatz
uspto-grants-1992_05
Patentnummer
US05112523

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