Toluene → 3-methyl-1-(1-methyl-1H-imidazol-2-yl)-2-oxo-4-imidazolidinecarboxylic acid

HRID 2081016Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2081016
FC(F)(F)C(O)=O.[CH3:8][N:9]1[CH:13]([C:14]([O:16]C(C)(C)C)=[O:15])[CH2:12][N:11]([C:21]2[N:22]([CH3:26])[CH:23]=[CH:24][N:25]=2)[C:10]1=[O:27].C1(C)C=CC=CC=1>C(Cl)Cl>[CH3:8][N:9]1[CH:13]([C:14]([OH:16])=[O:15])[CH2:12][N:11]([C:21]2[N:22]([CH3:26])[CH:23]=[CH:24][N:25]=2)[C:10]1=[O:27]

Komponenten

5

Edukt 3

HCID 1140TolueneHCID 6422Trifluoroacetic acidHCID 67103397HCID 67103397, Verbindung

Produkt 1

HCID 671034053-methyl-1-(1-methyl-1H-imidazol-2-yl)-2-oxo-4-imidazolidinecarboxylic acidAusbeute 100 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a stirred solution of 1,1-dimethylethyl 3-methyl-2-oxo-4-imidazolidinecarboxylate (0.200 g, 1.00 mmol) (prepared as described in step (iii) of Example 13, starting from (4S)-2-oxo-3-{[(phenylmethyl)oxy]carbonyl}-4-imidazolidinecarboxylic acid) and 2-bromo-1-methyl-1H-imidazole (0.146 ml, 1.500 mmol) in 1,4-dioxane (8 ml) was added potassium phosphate (1.062 g, 5.00 mmol), copper(I) iodide (0.190 g, 1.000 mmol) and trans-N,N-dimethylcyclohexane-1,2-diamine (0.155 ml, 1.000 mmol) and the mixture heated at reflux under argon overnight. The mixture was cooled to room temperature and diluted with dichloromethane. The solid was filtered off, washed with dichloromethane and the filtrate reduced under vacuum. The residue was re-dissolved in dichloromethane and washed with 0.880 ammonia solution (×2), water then brine and passed through a hydrophobic frit and the organic layer reduced under vacuum. The residue was purified by Flashmaster automated silica gel chromatography eluting with 0-10% methanol in dichloromethane to give 1,1-dimethylethyl 3-methyl-1-(1-methyl-1H-imidazol-2-yl)-2-oxo-4-imidazolidinecarboxylate (145 mg, 37.8% yield). LC/MS [M+H]+=281. (ii) Trifluoroacetic acid (0.059 ml, 0.517 mmol) was added to a solution of 1,1-dimethylethyl 3-methyl-1-(1-methyl-1H-imidazol-2-yl)-2-oxo-4-imidazolidinecarboxylate (145 mg, 0.517 mmol) in DCM (2 ml) and the reaction stirred at room temperature overnight. The reaction mixture was co-evaporated with toluene and dried to give 3-methyl-1-(1-methyl-1H-imidazol-2-yl)-2-oxo-4-imidazolidinecarboxylic acid (assume ˜0.517 mmol) which was used which was used in the next step. LC/MS [M+H]+=225.

Aufarbeitung

  1. customdried

Quellen und Nachweise

ORD-Eintrag
ord-c3f3bd59ca5d488087f0321ce99a359b
Quelldatensatz
uspto-grants-2011_04
Patentnummer
US07932282B2

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