反应详情

To a solution of 1-(6-benzoylamino-9H-purin-9-yl)-1,3-dideoxy-3-amino-β-D-ribofuranuronic acid (384 mg) prepared in Example 1 and triethylamine (0.19 ml) in water (10 ml) was added a solution of N-hydroxysuccinimide ester of N-benzyloxycarbonyl-L-phenylalanine (635 mg) in tetrahydrofuran (10 ml) at room temperature under stirring, which was continued overnight. The mixture was evaporated to remove tetrahydrofuran, acidified with 10% hydrochloric acid and extracted with ethyl acetate. The extract was washed with brine, dried over magnesium sulfate and evaporated to dryness. The residue was triturated in diethyl ether to give 1-(6-benzoylamino-9H-purin-9-yl)-1,3-dideoxy-3-(N-benzyloxycarbonyl-L-phenylalanylamino)-β-D-ribofuranuronic acid (521 mg), mp. 145°-150° C. (dec.).

1. customThe mixture was evaporated
2. customto remove tetrahydrofuran
3. extractionextracted with ethyl acetate
4. washThe extract was washed with brine
5. dry with materialdried over magnesium sulfate
6. customevaporated to dryness
7. customThe residue was triturated in diethyl ether