反应详情

To (2R,5S)-2-methyl-5-(2-oxo-pyrrolidin-1-ylmethyl)-piperazine-1-carboxylic acid tert-butyl ester (2.73 g, 9.19 mmol) and potassium carbonate (1.4 g, 10.1 mmol) in MeCN (9.8 mL) was added benzyl bromoacetate (2.11 g, 9.2 mmol) at room temperature. The reaction was stirred at this temperature for 18 h then diluted with chloroform, filtered and the filtrate concentrated. Chromatography (silica gel, gradient elution, 0-60%, EtOAc in petrol 40-60) gave the title compound (4 g). MS: [M+H]+=446.

1. filtrationfiltered
2. concentrationthe filtrate concentrated
3. washChromatography (silica gel, gradient elution, 0-60%, EtOAc in petrol 40-60)