反应详情

To a mixture of ethyl 4,4-diethoxy-3-oxobutanoate (prepared according to the method of E. Graf, R. Troschutz, Synthesis, 1999, 7, 1216; 10.0 g, 46 mmol) and cyclopropane-carboximidamide monohydrochloride (Lancaster Synthesis, 5.0 g, 41 mmol) in methanol (100 mL) was added a methanol solution of sodium methoxide (5.4 M, 8.4 mL, 46 mmol). The reaction mixture was stirred overnight. The solvent was removed with a rotary evaporator. Dichloromethane was added and the mixture was filtered. The solvent from the filtrate was removed with a rotary evaporator. The residue was purified by medium pressure liquid chromatography (MPLC) (35→100% ethyl acetate in hexanes as eluant) to afford the title compound as a white solid (4.67 g).

1. customprepared
2. customTroschutz, Synthesis, 1999, 7, 1216
3. customThe solvent was removed with a rotary evaporator
4. additionDichloromethane was added
5. filtrationthe mixture was filtered
6. customThe solvent from the filtrate was removed with a rotary evaporator
7. customThe residue was purified by medium pressure liquid chromatography (MPLC) (35→100% ethyl acetate in hexanes as eluant)