反应详情

To a 0° C. solution of 2.4 g (11.4 mmol) of 3-benzyloxy-2,2-dimethyl-propionic acid and 1.65 ml (11.5 mmol) of Et3N in 80 mL of chloroform was added 1.04 mL (11.5 mmol) of ethyl chloroformate. After stirring for 15 min, NH3 gas was passed through the solution for 5 minutes. The resulting suspension was removed from the ice bath and allowed to stir overnight. The suspension was filtered and the filtrate was concentrated to near dryness. The resulting residue was crystallized from benzene/hexanes (16 mL/40 mL) mixture to provide 2.3 g of 3-benzyloxy-2,2-dimethyl-propionamide.

1. customThe resulting suspension was removed from the ice bath
2. stirringto stir overnight
3. filtrationThe suspension was filtered
4. concentrationthe filtrate was concentrated
5. customThe resulting residue was crystallized from benzene/hexanes (16 mL/40 mL) mixture