[O:1]1CCOCC1.[CH3:7][O:8][CH2:9][C:10]1([C:15]#[N:16])[CH2:13][C:12](=C)[CH2:11]1.I([O-])(=O)(=O)=O.[Na+]>O.[Os](=O)(=O)(=O)=O>[CH3:7][O:8][CH2:9][C:10]1([C:15]#[N:16])[CH2:13][C:12](=[O:1])[CH2:11]1A mixture of water (2 mL, 0.1 mol) and 1,4-dioxane (7 mL, 0.08 mol), 1-(methoxymethyl)-3-methylenecyclobutanecarbonitrile (0.294 g, 0.00214 mol), and 0.2 M of osmium tetraoxide in water (0.04 mL) was stirred for 5 min, during which time the mixture became brown. While the temperature was maintained at room temperature, sodium periodate (0.963 g, 0.00450 mol) was added in portions over a period of 30 min. The mixture was stirred overnight. The mixture was extracted with EtOAc and the combined organic layers were dried over MgSO4. After removal of the solvents, the crude product was used directly in next step (298 mg, 99.92%). 1H NMR (400 MHz, CDCl3): 3.70 (2H, s), 3.68 (3H, s), 3.58 (2H, m), 3.38 (2H, m) ppm.
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