反应详情

A solution of (2S)-1-[3-(N-benzyl-N-methylcarbamoyl)propanoyl]pyrrolidin-2-al (700 mg) in THF (5 ml) was cooled to -25° C. A solution of ethyl magnesium chloride in THF (2M, 1.5 ml) was added dropwise to the solution. The mixture was stirred for 30 mins at the same temperature, and for 30 mins at 0° C. and further 1 hr. at room temperature. After reaction, a saturated aq. solution of ammonium chloride was added to the mixture. The oily layer separated was washed, dried and evaporated. The residue was purified by column chromatography on silica gel (EtOAc - CH3OH) to give the title compound (270 mg) having the following physical data:

1. waitfor 30 mins at 0° C.
2. customfurther 1 hr
3. customat room temperature
4. customAfter reaction
5. customThe oily layer separated
6. washwas washed
7. customdried
8. customevaporated
9. customThe residue was purified by column chromatography on silica gel (EtOAc - CH3OH)