反应详情

A reaction vessel was charged with 44.1 g of 4-(3,3-dichloro-2-propenyloxy)phenyl benzoate and 400 ml of methanol, and 33 g of 30% aqueous potassium hydroxide solution was slowly added dropwise under ice cooling. After stirring for 1 hour, the mixture was made weak acidic by the addition of 10% hydrochloric acid, and then extracted twice with 150 m of diethyl ether under salting out. The ether layers were combined, washed with water, dried over anhydrous magnesium sulfate, and then concentrated to give a crude product. The crude product was subjected to silica gel chromatography, which afforded 26.0 g of 4-(3,3-dichloro-2-propenyloxy)phenol (87% yield).

1. additionwas slowly added dropwise under ice cooling
2. extractionextracted twice with 150 m of diethyl ether under salting out
3. washwashed with water
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated
6. customto give a crude product