N-Methoxy-N-methylacetamide → HCID 59208500, Verbindung

Reaktionsgleichung

C([Li])CCC.[CH3:6][O:7][CH2:8][CH2:9][N:10]1[CH:14]=[CH:13][N:12]=[CH:11]1.CON(C)[C:18](=[O:20])[CH3:19]>C1COCC1>[CH3:6][O:7][CH2:8][CH2:9][N:10]1[CH:14]=[CH:13][N:12]=[C:11]1[C:18](=[O:20])[CH3:19]

Komponenten

Versuchsvorschrift

A solution of 30 ml (75 mmol) of 2.5 M n-butyllithium in hexanes was added slowly to a solution of 8.48 g (61.3 mmol) 1-(2-methoxyethyl)-1H-imidazole (WO 2003055876 A1) in 200 ml THF cooled in a dry ice-acetone bath. After stirring 1 h, 8 ml (75 mmol) of N-methoxy-N-methylacetamide was added quickly, and the solution was allowed to warm to room temperature over 30 min. After quenching with aqueous NH4Cl, the mixture was diluted with water and extracted twice with EtOAc. The combined EtOAc layers were which washed with brine, dried over anhydrous MgSO4, and concentrated to give an oil that was chromatographed on silica gel (100% DCM followed by gradient elution to 50% EtOAc in DCM). The title compound (8.5 g) was obtained as a mobile oil. MS (ES) (M+H)+: 169 for C8H12CN2O2; NMR: 2.69 (s, 3H), 3.34 (s, 3H), 3.71 (m, 2H), 4.61 (m, 2H), 7.12 (s, 1H), 7.26 (s, 1H).