Isopropanol → Propan-2-yl Pyrrolidine-2-carboxylate
反応式
C1([C@H](NC([C:13]2[CH:14]=[C:15]([C:22](N3CCC[C@@H]3C(O)=O)=[O:23])[N:16]3CCOC[C:17]=23)=O)CC)C=CC=CC=1.[CH:32]([OH:35])([CH3:34])[CH3:33]>Cl>[CH:32]([O:35][C:22]([CH:15]1[CH2:14][CH2:13][CH2:17][NH:16]1)=[O:23])([CH3:34])[CH3:33]参加物
4
実験手順
A solution of (R)-1-[8-((R)-1-phenyl-propylcarbamoyl)-3,4-dihydro-1H-pyrrolo[2,1-c][1,4]oxazine-6-carbonyl]-pyrrolidine-2-carboxylic acid in isopropanol and 2 drops of concentrated aqueous hydrochloric acid was heated to reflux overnight. Solvents were evaporated. The residue was dissolved in a small amount of acetonitrile, excess water was added and the solution was freeze-dried to give 27 mg (49%) of (R)-1-[84(R)-1-phenyl-propylcarbamoyl)-3,4-dihydro-1H-pyrrolo[2,1-c][1,4]oxazine-6-carbonyl]-pyrrolidine-2-carboxylic acid isopropyl ester. LC/MS (method 4): Rt=1.27 min; m/z=468.35 (M+H+).