Furan → 2,5-Di-tert-butylfuran

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Dichloromethane (1275 g), iron (III) oxide (200 g) and iron (III) cloride (5.0 g) were charged to a reaction vessel and the stirred mixture was heated to reflux temperature (ca. 40° C.). A mixture of furan (85.1 g) and tert.butyl chloride (289.3 g) was then run into the solvent/catalyst mixture during about 1.5 hours, and the mixture was then maintained at reflux temperature, with stirring, for a further 1.5 hours after the addition was complete. The reaction mixture was then filtered to remove the catalyst, which was washed on the filter with dichloromethane (2×100 g). The filtrate and washings were combined and the dichloromethane was distilled off until the internal temperature of the mixture reached 60°-65° C. Glycerol (125 g) was then added and the mixture was subjected to distillation under reduced pressure to give 2,5-di-tert.butylfuran (80 g at 85.9% strength=32% of theoretical based on furan charged) b.p. 85° C./15 mm Hg pressure (20 mbar).

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