反应详情

(R)-4-(6-Benzyl-4,5-dimethyl-pyridazin-3-yl)-5′-isopropenyl-2-methyl-3,4,5,6-tetrahydro-2H-[1,2′]bipyrazinyl (example 143, 120 mg, 0.290 mmol) is suspended in acetone (2 mL), tert-butanol (1 mL), and H2O (1 mL). To this suspension is added K2OsO4 (9.6 mg, 0.029 mmol) and NMO (37.4 mg, 0.319 mmol). The reaction is stirred at room temperature for 16 h. Concentrate in vacuo. Add H2O and extract with EtOAc. Wash the combined organics with brine and concentrate in vacuo. The residue is purified by flash chromatography on silica gel (MeOH/CH2Cl2) to afford the title compound (49.2 mg, 38%).

1. concentrationConcentrate in vacuo
2. extractionAdd H2O and extract with EtOAc
3. washWash the combined organics with brine
4. concentrationconcentrate in vacuo
5. customThe residue is purified by flash chromatography on silica gel (MeOH/CH2Cl2)