Diisopropylethylamine → morpholine-4-carboxylic acid [(S)-3,3-difluoro-1-((S)-1-{hydroxy-[5-(4-trifluoromethoxy-phenyl)-1,3,4-oxadiazol-2-yl]-methyl)-propylcarbamoyl)-hexyl]-amide

Participants

Reaction Steps

PyBOP (68.69 mg, 0.13 mmol), diisopropylethylamine (0.023 mL, 0.13 mmol) and (S)-2-Amino-1-[5-(4-trifluoromethoxy-phenyl)-1,3,4-oxadiazol-2-yl]-butan-1-ol (38.0 mg, 0.12 mmol) are added to a solution of (S)-4,4-Difluoro-2-[(morpholine-4-carbonyl)-amino]-heptanoic acid (34 mg, 0.12 mmol) in dry methylene chloride (4 mL) and the reaction mixture is stirred overnight at room temperature. The reaction is quenched with aqueous NaHCO3, extracted twice with methylene chloride, the organic extracts are dried over Na2SO4 and evaporated under reduced pressure. Column chromatography on silica eluting with a mixture of methylene chloride and ethyl acetate gives morpholine-4-carboxylic acid [(S)-3,3-difluoro-1-((S)-1-{hydroxy-[5-(4-trifluoromethoxy-phenyl)-1,3,4-oxadiazol-2-yl]-methyl}-propylcarbamoyl)-hexyl]-amide as a solid (61 mg). LC/MS 71%, M+1=594

Provenance & Evidence