Sodium Nitrite → HCID 136335130, compound

Participants

Reaction Conditions

Reaction Steps

Sodium nitrite (0.405 g, 5.88 mmol) was added to a solution of 1-benzo[1,3]dioxol-5-yl-2-(6-methyl-pyridin-2-yl)-ethanone (1.0 g, 3.92 mmol; see Example 3B above) in a mixture of HOAc/THF/H2O (6:4:1, 22 mL). The mixture was stirred at 0° C. for 1 hour and then at room temperature for 1 hour. Solvent was removed under reduced pressure. Residue was dissolved in water and NaOH (3N) was added until the pH value was more than 8. The aqueous solution was then extracted with ethyl acetate. The organic layer was washed with brine, dried over sodium sulfate, filtered, and concentrated to give 0.90 g (81%) of 1-Benzo[1,3]dioxol-5-yl-2-(6-methyl-pyridin-2-yl)ethane-1,2-dione 2-oxime as a yellow foam. MS (ESP+) m/z 285.1 (M+1). 1H NMR (300 MHz, CDCl3) δ 7.49 (m, 4H), 7.09 (d, 1H, J=7.5 Hz), 6.81 (d, 1H, J=7.8 Hz), 6.04 (s, 2H), 2.43 (s, 3H).

Provenance & Evidence