反应详情

In 8 ml of DMF were dissolved 808 mg of benzoyl-L-phenylalanine and 2.05 g of Nδ,Nω -dibenzyloxycarbonyl-L-arginine 1-naphthyl ester trifluoroacetate, after which 681 mg of DCC, 405 mg of HOBt and 304 mg of TEA were added thereto with ice-cooling, and the mixture was stirred for 3 hrs, and then at room temperature for a further 24 hrs. After the reaction, the DCU thus precipitated was removed by filtration, and ethyl acetate was added to the filtrate, after which the mixture was washed with 10% citric acid solution, saturated sodium bicarbonate solution and saturated sodium chloride solution in this order, and then dried over anhydrous magnesium sulfate. The solvent was removed by evaporation under reduced pressure, and the residue thus obtained was recrystallized from chloroform-diethyl ether to obtain 1.4 g (yield 57%) of benzoyl-L-phenylalanyl-Nδ,Nω -dibenzyloxycarbonyl-L-arginine 1-naphthyl ester, m.p. 177°-185° C.

1. temperaturewith ice-cooling
2. waitat room temperature for a further 24 hrs
3. customAfter the reaction
4. customthe DCU thus precipitated
5. customwas removed by filtration, and ethyl acetate
6. additionwas added to the filtrate
7. washafter which the mixture was washed with 10% citric acid solution, saturated sodium bicarbonate solution and saturated sodium chloride solution in this order
8. dry with materialdried over anhydrous magnesium sulfate
9. customThe solvent was removed by evaporation under reduced pressure
10. customthe residue thus obtained
11. customwas recrystallized from chloroform-diethyl ether