транс-3-Пентен-2-он

Использование

trans-3-Penten-2-one undergoes conjugate addition as in Michael and cuprate reactions; reagent for Robinson annulation and Diels-Alder reaction.

Подготовка

An excellent method of trans-3-Penten-2-one involves the Wittig reaction of Acetylmethylenetriphenylphosphorane and Acetaldehyde (2.5 mol equiv) in methylene chloride (reflux, 6h, 76% yield). Another good method13 proceeds via the Aluminum Chloride catalyzed addition of Acetyl Chloride to propene followed by dehydrochlorination.

хранилище

Trans-3-Penten-2-one should be best stored in refrigerator; moderately toxic; lachrymator. This reagent should only be handled in a fume hood.

Методы очистки

Fractional distillation.