1,1-Dimethylethyl octahydro-5-hydroxy-2H-isoindole-2-carboxylate → tert-butyl 5-oxo-octahydro-1H-isoindole-2-carboxylate
反応式
[OH:1][CH:2]1[CH2:10][CH2:9][CH:8]2[CH:4]([CH2:5][N:6]([C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:7]2)[CH2:3]1>C(Cl)Cl>[O:1]=[C:2]1[CH2:10][CH2:9][CH:8]2[CH:4]([CH2:5][N:6]([C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:7]2)[CH2:3]1参加物
3
反応条件
- 温度
- 0 °C
実験手順
To a solution of tert-butyl 5-hydroxyhexahydro-1H-isoindole-2(3H)-carboxylate (48.98 g, 203.0 mmol) in DCM (500 mL) at 0° C. was added DMP (103.31 g, 243.6 mmol) portionwise. After addition, the reaction mixture was stirred at 0° C. for 0.5 h and then moved to rt overnight, cooled down to 0° C. and washed with a mixture of NaHCO3/Na2S2O3 saturated solution (v/v, 1/1, 500 mL), then stirred at 0° C. for 0.5 h and filtered. The filter cake was washed with DCM (250 mL×3) and the filtrate was extracted with DCM (250 mL×3). The combined organic phases were washed with brine (500 mL), then dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography (EtOAc/PE (v/v)=1/5) to give the title compound as yellow oil (48.58 g, 100%).