3-Chloro-1-butene → 3-[(But-2-en-1-yl)sulfanyl]-2-methylfuran

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Into a 50 ml round bottom 1 neck flask equipped with nitrogen inlet tube, "Y" tube, reflux condenser, magnetic stirrer, and cold water bath is placed a solution containing 0.54 g of sodium methylate (0.01 moles) in 6 ml of anhydrous methanol. 1.14 g (0.01 moles) of 2-methyl-3-furan thiol in 6 ml of anhydrous methanol is then added to the sodium methylate solution. The reaction mass is stirred for a period of 10 minutes, with cooling, maintaining the temperature thereof between 24° and 30° C. 0.91 g (0.01 moles) of a mixture of 80% 1-chloro-2-butene and 20% 3-chloro-1-butene dissolved in 2 ml of anhydrous methanol is then added over a 4 minute period warming to 33° C. The reaction mass is allowed to cool to 23° C. and remains at that temperature, with stirring, for a period of 2.5 hours, at which time it is concentrated to 7 ml on a rotary evaporator using water aspirator vacuum. 20 ml water is then added and the reaction mass is neutralized to a pH of 5 - 6 using 4% hydrochloric acid. The reaction mass is extracted with three 10 ml portions of n-hexane. The hexane extracts are combined, washed with 2 ml saturated sodium chloride solution, dried with anhydrous sodium sulfate and concentrated using a rotary evaporator to yield 1.24 g of a yellow oil.

Herkunft & Nachweise