p-Toluenesulfonic acid → 2-(4,5-Dimethyl-1,3-dithiolan-2-yl)furan

関与物質

反応手順

Into a 100 ml reaction flask equipped with magnetic stirring bar, thermometer and reflux condenser and hot plate with magnetic stirring apparatus is placed 0.5 grams para-toluenesulfonic acid, 5 ml cyclohexane and 6.1 grams (0.05 moles) of 2,3-butanedithiol. Over a period of 35 minutes, 4.8 grams (0.05 moles) of 2-furaldehyde is added to the reaction mass with stirring. The reaction mass is then heated to reflux and refluxed for a period of 7.5 hours with stirring while removing water to reaction. After the refluxing period, the reaction mass is cooled to room temperature and transferred to a separatory funnel. The reaction mass is then washed with one 50 ml portion of saturated sodium chloride soution and dried over anhydrous sodium sulfate and filtered. The resulting filtrate is distilled using a Microvigreux column yielding the following fractions:

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