1,1'-Carbonyldiimidazole → 1H-Imidazole-1-carboxamide, N-(2,2-dimethoxyethyl)-

HRID 1604428Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1604428
[C:1](N1C=CN=C1)([N:3]1[CH:7]=[CH:6][N:5]=[CH:4]1)=[O:2].[CH3:13][O:14][CH:15]([O:18][CH3:19])[CH2:16][NH2:17]>C(Cl)Cl>[CH3:13][O:14][CH:15]([O:18][CH3:19])[CH2:16][NH:17][C:1]([N:3]1[CH:7]=[CH:6][N:5]=[CH:4]1)=[O:2]

Komponenten

4

Edukt 2

HCID 682631,1'-CarbonyldiimidazoleHCID 89728Aminoacetaldehyde dimethyl acetal

Produkt 1

HCID 187633681H-Imidazole-1-carboxamide, N-(2,2-dimethoxyethyl)-Ausbeute 69 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A suspension of 1,1'-carbonyldiimidazole (162.15 g) in CH2Cl2 (500 ml) was stirred on an ice-bath. 2,2-Dimethoxyethanamine (105.14 g) was added dropwise and the resulting reaction solution was stirred for 16 hours. The reaction mixture was cooled on ice, stirred for 30 minutes, and was allowed to crystallize. The precipitate was filtered off, stirred for 15 minutes in ethylacetate (250 ml) at RT, then cooled on an ice-bath for 30 minutes. The precipitate was filtered off, washed twice with DIPE (50 ml), then dried, yielding 137.4 g (69%) of N-(2,2-dimethoxyethyl)-1-H-imidazole-1-carboxamide (interm. 26).

Aufarbeitung

  1. customthe resulting reaction solution
  2. stirringwas stirred for 16 hours
  3. temperatureThe reaction mixture was cooled on ice
  4. stirringstirred for 30 minutes
  5. customto crystallize
  6. filtrationThe precipitate was filtered off
  7. stirringstirred for 15 minutes in ethylacetate (250 ml) at RT
  8. temperaturecooled on an ice-bath for 30 minutes
  9. filtrationThe precipitate was filtered off
  10. washwashed twice with DIPE (50 ml)
  11. customdried

Quellen und Nachweise

ORD-Eintrag
ord-1d50e98925a5462b937ba53c79bac68e
Quelldatensatz
uspto-grants-1999_11
Patentnummer
US05994376

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