反应详情

To a solution of 1.0 g (6.25 mmol) of 3-chloro-L-alanine and 1.3 mL of triethylamine in 50% aqueous 1,4-dioxane were added 1.69 g (6.90 mmol) of 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile with stirring at room temperature. After 2 hours, the reaction mixture was poured into 20 mL of water and extracted twice with ethyl acetate. The organic layer was washed twice with water and then with saturated brine, dried over anhydrous magnesium sulfate and evaporated to give 0.66 g (40.5%) of white solid. Recrystallization from a mixture of ethyl acetate and n-hexane afforded 0.58 g of the pure product (35.6%) melting at 123-124° C., with decomposition, and having the structural formula: ##STR72## The identity of the product was confirmed by IR and NMR analyses.

1. extractionextracted twice with ethyl acetate
2. washThe organic layer was washed twice with water
3. dry with materialwith saturated brine, dried over anhydrous magnesium sulfate
4. customevaporated