反应详情

温度

60 °C

1.01 g (0.01 mole) (3RS)-3-hydroxymethyl pyrrolidine and 2.29 g (0.011 mole) N-benzyloxycarbonyl-O-methylisourea was dissolved (the amine not very soluble) in toluene and heated to 60° C. for three hours followed by stirring at room temperature over night. The mixture was evaporated and the 1H-NMR showed that the reaction was not completed. The mixture was therefore dissolved in 15 ml acetonitrile and heated to 60° C. for three hours followed by stirring at room temperature over night. The solvent was evaporated and the mixture was dissolved in CH2Cl2, washed once with water, dried (Na2 SO4), filtered and evaporated. The crude product was purified by flash chromatography using CH2Cl2 /MeOH 95/5 as eluent to yield 0.70 g (25%) of the product.

1. customThe mixture was evaporated
2. dissolutionThe mixture was therefore dissolved in 15 ml acetonitrile
3. temperatureheated to 60° C. for three hours
4. stirringby stirring at room temperature over night
5. customThe solvent was evaporated
6. dissolutionthe mixture was dissolved in CH2Cl2
7. washwashed once with water
8. customdried (Na2 SO4)
9. filtrationfiltered
10. customevaporated
11. customThe crude product was purified by flash chromatography