反应详情

A mixture of Morpholine-4-carboxylic acid [(S)-3,3-difluoro-1-((S)-1-hydroxymethyl-1-methyl-butylcarbamoyl)-4-phenyl-butyl]-amide (217 mg) and Dess-Martin Periodinane (15% in DCM, 2 eq.) in DCM (5 mL) is stirred at room temperature for 3 hrs and quenched with a solution of sodium thiosulfate in saturated NaHCO3. The product is extracted with ethyl acetate and washed with saturated NaCl solution. Organic phase is dried over anhydrous MgSO4, solvent evaporated under reduced pressure. Purification by silica gel chromatography eluting with ethyl acetate-heptane mixture gives Morpholine-4-carboxylic acid [(S)-3,3-difluoro-1-((S)-1-formyl-1-methyl-butylcarbamoyl)-4-phenyl-butyl]-amide (83 mg, 38%).

1. customquenched with a solution of sodium thiosulfate in saturated NaHCO3
2. extractionThe product is extracted with ethyl acetate
3. washwashed with saturated NaCl solution
4. dry with materialOrganic phase is dried over anhydrous MgSO4, solvent
5. customevaporated under reduced pressure
6. customPurification by silica gel chromatography
7. washeluting with ethyl acetate-heptane mixture