Acetic Acid → HCID 58370338, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of (4-Methanesulfonyl-2,3-dimethyl-pyridine)-1-oxide (24 g) and acetic acid (50 ml) was added acetic anhydride (28.2 ml), followed by heating to reflux and maintaining the same temperature for about 3 hrs. The reaction mass was cooled to 80° C. and methanol (25 ml) was added followed distilling off the solvent completely under vacuum. THF:methanol (125:25 ml), LiOH (7.5 g) was added to the crude at 25-30° C. followed by adding DCM (100 ml) to the reaction mixture and extraction with (2×150 ml) DCM. All the organic layers were combined and washed with saturated sodium chloride solution (25 ml). The organic layer was dried over sodium sulphate and distilled off completely under vacuum. Subsequently, n-hexane (100 ml) was added to the reaction mass, the compound filtered and washed with n-hexane (10 ml). The wet compound was then dried at 50-55° C. to yield 14 g of the title compound characterized by 1HNMR data (300 MHz): δ 2.58 (s, 3H), 3.13 (s, 3H), 4.62 (s, 1H), 4.80 (s, 2H), 7.86 (d, 1H), 8.68 (d, 1H) and mass [M]+: 202.06.

Provenance & Evidence