反应详情

An aqueous 1N sodium hydroxide solution (100 ml) was added to a solution 35 g of benzyl 3-[N-(2,2,5,5-Tetramethyl-1,3-dioxane-4-carbonyl)amino]propionate in 350 ml of methanol, and the mixture was stirred under ice cooling for 1 hour. After completion of the reaction, methanol was distilled off under reduced pressure. The aqueous layer was extracted with ethyl acetate. After adding 1N hydrochloric acid to the aqueous layer to render it acidic, the aqueous layer was extracted with ethyl acetate. The organic layer washed with water and then with saturated saline, and dried over anhydrous sodium sulfate. Removal of the solvent by evapoation afforded 20.4 g of the objective compound (yield: 78%).

1. distillationwas distilled off under reduced pressure
2. extractionThe aqueous layer was extracted with ethyl acetate
3. additionAfter adding 1N hydrochloric acid to the aqueous layer
4. extractionthe aqueous layer was extracted with ethyl acetate
5. washThe organic layer washed with water
6. dry with materialwith saturated saline, and dried over anhydrous sodium sulfate
7. customRemoval of the solvent by evapoation