反应详情

L-Leucine (Aldrich) (0.114 g, 0.869 mmols) was taken-up in dioxane (5.0 mL) and treated with a saturated solution of sodium bicarbonate (5.0 mL) followed by phenylacetyl chloride (Aldrich) (0.114 mL, 0.822 mmols). After stirring for 17 hours at room temperature the mixture was diluted with ethyl acetate, the layers separated and the aqueous layer acidified to pH 2 with 5N HCl. The crude product was extracted into ethyl acetate, dried over sodium sulfate, vacuum dried and used without further purification. N-Phenylacetyl-L-leucine (0.0081 g, 0.038 mmol) was dissolved in 2.0 mL CHCl3 (EtOH free) and iso-butyl alcohol (0.055 mL) and treated with P-EPC (100 mg, 0.87 milliequivalents). The mixture was rotated for 4 days, filtered through a plug of cotton and the filtrate evaporated at reduced pressure to an oil which was sufficiently pure for testing.

1. customthe layers separated
2. extractionThe crude product was extracted into ethyl acetate
3. dry with materialdried over sodium sulfate, vacuum
4. customdried
5. customused without further purification
6. waitThe mixture was rotated for 4 days
7. filtrationfiltered through a plug of cotton
8. customthe filtrate evaporated at reduced pressure to an oil which