Boron Trichloride → (2S,5R)-6-hydroxy-2-(3-methyl-1,2,4-oxadiazol-5-yl)-1,6-diazabicyclo[3.2.1]octan-7-one
反応式
B(Cl)(Cl)Cl.C([O:12][N:13]1[C:19](=[O:20])[N:18]2[CH2:21][C@H:14]1[CH2:15][CH2:16][C@H:17]2[C:22]1[O:26][N:25]=[C:24]([CH3:27])[N:23]=1)C1C=CC=CC=1>C(Cl)Cl>[OH:12][N:13]1[C:19](=[O:20])[N:18]2[CH2:21][C@H:14]1[CH2:15][CH2:16][C@H:17]2[C:22]1[O:26][N:25]=[C:24]([CH3:27])[N:23]=1参加物
4
実験手順
BCl3 (1M DCM solution, 2.5 mL, 2.5 mmol) was added dropwise to a solution of (2S,5R)-6-(benzyloxy)-2-(3-methyl-1,2,4-oxadiazol-5-yl)-1,6-diazabicyclo[3.2.1]octan-7-one (130 mg, 0.414 mmol) in dry DCM (12 mL) at −78° C. The mixture was stirred at −78° C. to 0° C. for 4 hrs. The reaction mixture was then quenched with MeOH (2 mL). The solvent was removed and the residue was purified by silica gel column chromatography (0 to 10% MeOH/DCM) to afford (2S,5R)-6-hydroxy-2-(3-methyl-1,2,4-oxadiazol-5-yl)-1,6-diazabicyclo[3.2.1]octan-7-one (30 mg, 32%).