反应详情

To a solution of 550 mg of 4-Hydroxy-7-methyl-naphthalene-2-carboxylic acid and 1.0 g of 4-((S)-2-Amino-4-tert-butoxycarbonyl-butyryl)-piperazine-1-carboxylic acid butyl ester in 8.3 ml of DMF, 458 mg of HOBT and 573 mg of EDC was added and the reaction mixture was stirred for 16 h at RT. Then, the reaction mixture was diluted with water and extracted with ethyl acetate. The organic phase was dried over MgSO4 and the solvents were removed under reduced pressure. The crude product was purified by chromatography on silica gel eluting with n-heptane/ethyl acetate (1/1). The fractions containing the product were combined and the solvent evaporated under reduced pressure. Yield: 1.0 g.

1. extractionextracted with ethyl acetate
2. dry with materialThe organic phase was dried over MgSO4
3. customthe solvents were removed under reduced pressure
4. customThe crude product was purified by chromatography on silica gel eluting with n-heptane/ethyl acetate (1/1)
5. additionThe fractions containing the product
6. customthe solvent evaporated under reduced pressure