Water → 2-{[(2-Methylfuran-3-yl)sulfanyl]methyl}pyridine

Participants

Reaction Conditions

Reaction Steps

Into a 25 ml 3 neck round bottom flask equipped with magnetic stirrer, pot thermometer, Y tube, nitrogen inlet tube, reflux condenser and heating mantle is placed a solution of 0.54 g (0.01 moles) of sodium methoxide dissolved in 3 ml absolute methanol. The reaction mass is maintained at 25° -30° C and a solution of 0.57 g (0.005 moles) of 2-methyl-3-furan thiol in 3 ml absolute methanol is added to the reaction mass. While maintaining the reaction mass at 25° C, picolyl chloride hydrochloride (0.82 g; 0.005 moles) dissolved in 2 ml absolute methanol is added to the reaction mass. The reaction being exothermic, the reaction mass warms up to 42° C and a white solid precipitate forms. The reaction mass is then allowed to cool to 25° C (with stirring) over a period of 30 minutes. The reaction is then heated to reflux (60° - 65° C) under nitrogen and reflux is continued for a period of 1 hour. The reaction mass is cooled to 25° C. After remaining at room temperature for a period of 12 hours, 10 ml of water is added to the reaction mass with stirring, causing the reaction mass to now exist in two phases; an aqueous phase and an organic phase. The pH of the reaction mixture is 5. 7 ml of n-hexane is then added to the reaction mass with stirring and transferred to a separatory funnel. The aqueous layer is separated from the organic phase and extracted with 8 ml n-hexane after first diluting the aqueous phase with another 10 ml of water. The hexane extracts are combined, washed with 7 ml of saturated sodium chloride solution, dried over anhydrous sodium sulfate, gravity filtered, then concentrated on a rotary evaporator using water-aspirator vacuum.

Provenance & Evidence