Diethyl (ethoxymethylene)malonate → diethyl N-(3-oxo-1-cyclohexen-1-yl)-aminomethylenemalonate
Reaktionsgleichung
[NH2:1][C:2]1[CH2:7][CH2:6][CH2:5][C:4](=[O:8])[CH:3]=1.C(O[CH:12]=[C:13]([C:19]([O:21][CH2:22][CH3:23])=[O:20])[C:14]([O:16][CH2:17][CH3:18])=[O:15])C>>[CH2:17]([O:16][C:14](=[O:15])[C:13](=[CH:12][NH:1][C:2]1[CH2:7][CH2:6][CH2:5][C:4](=[O:8])[CH:3]=1)[C:19]([O:21][CH2:22][CH3:23])=[O:20])[CH3:18]Komponenten
3
Reaktionsbedingungen
- Temperatur
- 130 °C
Versuchsvorschrift
A mixture of 3-amino-cyclohex-2-enone (3.3 g, 29.7 mmol) and diethyl 2-(ethoxymethylene)malonate (6.7 g, 31.2 mmol) was stirred at 130° C. for 4 h. The reaction mixture was concentrated under reduced pressure and the resulting oil was purified by column chromatography (silica gel, ethyl acetate) to give 2-[(3-oxo-cyclohex-1-enylamino)-methylene]-malonic acid diethyl ester (7.5 g, 90%).