反应详情

温度

-78 °C

To a solution of oxalyl chloride (0.52 ml) in dichloromethane (15 ml) was added dropwise dimethyl sulfoxide (0.60 ml) at -78° C. After stirring at -78° C. for 10 minutes, to the mixture was added dropwise a solution of (2S)-5-allyloxycarbonylimino-2-hydroxymethyl-1-methylpyrrolidine (0.63 g) in dichloromethane (10 ml). After stirring at -78° C. for 10 minutes, to the mixture was added dropwise triethylamine (2.1 ml) and the resulting mixture was allowed to warm to 0° C. The mixture was washed with water and brine, dried over magnesium sulfate, and evaporated. The residue was chromatographed on silica gel eluting with a mixture of acetone and dichloromethane (1:4 V/V) to give (2S)-5-allyloxycarbonylimino-2-formyl-1-methylpyrrolidine (0.46 g).

1. stirringAfter stirring at -78° C. for 10 minutes, to the mixture
2. temperatureto warm to 0° C
3. washThe mixture was washed with water and brine
4. dry with materialdried over magnesium sulfate
5. customevaporated
6. customThe residue was chromatographed on silica gel eluting with a mixture of acetone and dichloromethane (1:4 V/V)