HRID45607

反应详情

EQUATION

反应方程式

HRID 45607 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

A solution of (2R)-{[(2R)-2-[(tert-butoxycarbonyl)amino]-2-(2,3-dihydro-1H-inden-2-yl)ethanoyl][(1R)-1-(methoxycarbonyl)-3-methylbutyl]amino}(4-fluorophenyl)ethanoic acid (73 mg) in N,N-dimethylformamide (2 ml) was sequentially treated with diisopropylethylamine (51 μl), phosphorusI (1-hydroxy-1H-benzotriazolato-O)tri-1-pyrrolidinyl-(T-4)-hexafluorophosphate (80 mg) and then after 2 minutes, 2,2,2-trifluoroethylamine (25 μl). This reaction mixture was stirred for 2 hours before being partitioned between 2M aqueous hydrochloric acid and ethyl acetate. The organic layer was washed with saturated aqueous sodium bicarbonate solution and brine before being dried over magnesium sulphate and evaporated in vacuo. The residue was dissolved in 4M hydrogen chloride in dioxane and stirred for 7 hours at room temperature. The reagent was removed in vacuo and the residue partitioned between ethyl acetate and saturated aqueous sodium bicarbonate solution. The separated organic fraction was washed with brine before being dried over magnesium sulphate and evaporated in vacuo. The crude material was purified by column chromatography (silica) eluting with methanol:dichloromethane (1% to 3%) to furnish ((2R)-2-[(3R,6R)-3-(2,3-dihydro-1H-inden-2-yl)-6-isobutyl-2,5-dioxopiperazin-1-yl]-2-(4-fluorophenyl)-N-(2,2,2-trifluoroethyl)ethanamide (10 mg)

WORKUP

后处理

  1. custombefore being partitioned between 2M aqueous hydrochloric acid and ethyl acetate
  2. washThe organic layer was washed with saturated aqueous sodium bicarbonate solution and brine
  3. dry with materialbefore being dried over magnesium sulphate
  4. customevaporated in vacuo
  5. dissolutionThe residue was dissolved in 4M hydrogen chloride in dioxane
  6. stirringstirred for 7 hours at room temperature
  7. customThe reagent was removed in vacuo
  8. customthe residue partitioned between ethyl acetate and saturated aqueous sodium bicarbonate solution
  9. washThe separated organic fraction was washed with brine
  10. dry with materialbefore being dried over magnesium sulphate
  11. customevaporated in vacuo
  12. customThe crude material was purified by column chromatography (silica)
  13. washeluting with methanol