反应详情

To a solution of N-benzyloxycarbonylglycine (0.21 g.) in freshly distilled THF (5 ml.) was added N-methylmorpholine (0.1 g.). The resulting solution was stirred with cooling in an ice-salt bath, and a solution of i-butyl chloroformate (0.136 g.) in a small volume of THF was added in one portion. A precipitate formed immediately, and the mixture was stirred with cooling for 5 minutes. A solution of 4-[2-(2,2,2-trifluoroethyl)guanidino]-2-(5-aminopentyl)pyrimidine (0.35 g.) in THF (10 ml.) was gradually added. The mixture was stirred at room temperature for 2 hours, then evaporated in vacuo. Sodium bicarbonate solution was added to the residue and the mixture extracted with EtOAc. The extract was dried (MgSO4) and evaporated to give a pale yellow oil which was purified by medium pressure chromatography, eluting with 5% v/v MeOH in methylene chloride to give 4-[2-(2,2,2-trifluoroethyl)guanidino]-2-[5-(2-benzyloxycarbonylaminoacetylamino)pentyl]pyrimidine (0.17 g.) which was used without further purification.

1. temperaturewith cooling in an ice-salt bath
2. customA precipitate formed immediately
3. stirringthe mixture was stirred
4. temperaturewith cooling for 5 minutes
5. stirringThe mixture was stirred at room temperature for 2 hours
6. customevaporated in vacuo
7. additionSodium bicarbonate solution was added to the residue
8. extractionthe mixture extracted with EtOAc
9. dry with materialThe extract was dried (MgSO4)
10. customevaporated
11. customto give a pale yellow oil which
12. customwas purified by medium pressure chromatography
13. washeluting with 5% v/v MeOH in methylene chloride