1,1'-Carbonyldiimidazole → HCID 20454780, Verbindung
Reaktionsgleichung
[CH2:1]([O:3][C:4](=[O:16])[CH2:5][NH:6][CH2:7][C:8]1[C:13]([CH3:14])=[CH:12][CH:11]=[CH:10][C:9]=1[NH2:15])[CH3:2].[C:17](N1C=CN=C1)(N1C=CN=C1)=[O:18]>O1CCCC1>[CH3:14][C:13]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:8]=1[CH2:7][N:6]([CH2:5][C:4]([O:3][CH2:1][CH3:2])=[O:16])[C:17](=[O:18])[NH:15]2Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To a cooled solution of 15.00 g (67 mmole) of N-(2-amino-6-methyl benzyl) glycine ethyl ester in 300 ml of anhydrous tetrahydrofuran under a nitrogen atmosphere was added a solution of 11.72 g (72 mmole) of 1,1'-carbonyldiimidazole in 200 ml of anhydrous tetrahydrofuran at such a rate that the temperature did not exceed 5°. Upon complete addition, the solution was allowed to stir at room temperature for 2 hrs., heated to reflux for 18 hrs., cooled to room temperature and the tetrahydrofuran removed in vacuo. The residue was dissolved in methylene chloride (250ml), washed with 5% aqueous hydrochloric acid (2 × 100 ml), then water (100 ml). The methylene chloride extract was dried (Na2SO4) and the solvent removed in vacuo affording 14.0 g (83% yield) of a colorless solid. Purification was effected by crystallization from nitromethane; mp 184°-5°.