Hydrochloric Acid → 2,5-Bis-(10-hydroxydecoxy)terephthalic acid

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Reaction Steps

A solution of 20.0 g (303 mmol) 85% aqueous KOH in 200 ml water is added to 38.0 g (58.4 mmol) diethyl-2,5-bis-(10-acetoxydecoxy)terephthalate in 200 ml ethanol and the whole is heated under reflux for 1.5 hours. 28.0 ml conc. HCl are then added dropwise with ice-cooling and stirring until the solution shows an acidic pH. The precipitated, colourless crude product is filtered off, washed neutral and recrystallized from ethanol and methanol/acetone.

Provenance & Evidence