HRID2413199

反应详情

EQUATION

反应方程式

HRID 2413199 的结构方程式

PROCEDURE

实验过程

Ethyl chloroformate (0.14 ml.) was added to a stirred mixture of 3-(imidazol-4-yl)propionic acid (0.3 g.) and triethylamine (2 ml.) in DMF (5 ml.) at 0° and the mixture stirred at 0° for 0.5 hours. 4-[2-(2,2,2-Trifluoroethyl)guanidino]-2-(5-aminopentyl)pyrimidine (0.3 g.) in DMF (2 ml.) was added to the mixture and stirring was continued at room temperature for 16 hours. The mixture was evaporated and the residue partitioned between EtOAc and 2 N aqueous HCl. The acid layer was basified with 11 N aqueous NaOH, extracted with EtOAc, dried (MgSO4) and evaporated to dryness. The residual gum was dissolved in EtOAc and treated with excess of a solution of maleic acid in EtOAc. The resulting solid was filtered and recrystallised from EtOH/EtOAc to give N-[5-(4-[2-(2,2,2-trifluoroethyl)guanidino]pyrimid-2-yl)pentyl]-3-(imidazol-4-yl)propionamide bis maleate hemihydrate (containing 0.5 EtOH of crystallisation) (0.2 g.), m.p. 136°-141° (decomp.).

WORKUP

后处理

  1. stirringstirring
  2. waitwas continued at room temperature for 16 hours
  3. customThe mixture was evaporated
  4. customthe residue partitioned between EtOAc and 2 N aqueous HCl
  5. extractionextracted with EtOAc
  6. dry with materialdried (MgSO4)
  7. customevaporated to dryness
  8. dissolutionThe residual gum was dissolved in EtOAc
  9. additiontreated with excess of a solution of maleic acid in EtOAc
  10. filtrationThe resulting solid was filtered
  11. customrecrystallised from EtOH/EtOAc