Water → HCID 19778888, Verbindung

HRID 2081916Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2081916
C(N(CC)CC)C.Cl.Cl.[CH3:10][O:11][C:12](=[NH:17])[CH:13]=[C:14]([NH2:16])[CH3:15].[Cl-].[CH2:19]([O:21][C:22](=[O:26])[C:23](O)=O)[CH3:20].O>ClCCl>[CH3:10][O:11][C:12]1[CH:13]=[C:14]([CH3:15])[N:16]=[C:23]([C:22]([O:21][CH2:19][CH3:20])=[O:26])[N:17]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 8471TriethylamineHCID 23618337Oxalic acid monoethylester chlorideHCID 86745111Methyl-3-amino-2-butenimidate dihydrochloride

Produkt 1

HCID 19778888HCID 19778888, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

182 ml of triethylamine in 50 ml of dichloromethane are added dropwise at -30° C. to a stirred suspension of 70.2 g of methyl-3-amino-2-butenimidate dihydrochloride in 350 ml of dichloromethane. Stirring is continued for 0.5 hour at this temperature, and 42 ml of oxalic acid ethyl ester chloride are then added dropwise. Stirring is continued for 1 hour at -30° C., and the mixture is allowed to come to room temperature in the course of 12 hours. The organic phase is stirred several times with water, dried over Na2SO4 and concentrated. After filtration over silica gel (eluent: CH2Cl2), the residue is distilled in vacuo. This gives 51.5 g of ethyl 4-methoxy-6-methylpyrimidine-2-carboxylate of boiling point 105°-115° C./0.05 mbar.

Aufarbeitung

  1. additionare then added dropwise
  2. stirringStirring
  3. customto come to room temperature in the course of 12 hours
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated
  6. filtrationAfter filtration over silica gel (eluent: CH2Cl2)
  7. distillationthe residue is distilled in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-e35b5996810e43fba0f7b56516b19f8d
Quelldatensatz
uspto-grants-1993_02
Patentnummer
US05186736

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