反应详情

(2R,4R)-4-Hydroxy-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester (16 g, 69 mmol) was dissolved in 100 mL DMF, added imidazole (12 g, 173 mmol), dimethylaminopyridine (0.85 g, 6.9 mmol), and tert-butyldimethylsilyl chloride (12.5 g, 83 mmol). Stirred at ambient temperature overnight, dissolved in 350 mL EtOAc, washed with 10% citric acid (3×200 mL), water (2×200 mL), brine, dried with MgSO4, filtered, and concentrated to yield title compound. (20 g, 84%) APCI (AP−): 344.2 (M−H)−.

1. washwashed with 10% citric acid (3×200 mL), water (2×200 mL), brine
2. dry with materialdried with MgSO4
3. filtrationfiltered
4. concentrationconcentrated