Allyl 3-hydroxybenzoate (2.82 g, 15.8 mmol), 3,4,5-tribenzyloxybenzoic acid (10.7 g, 23.1 mmol), DMAP (5.51 g, 26.5 mmol), and CH2Cl2 (200 mL) were combined and stirred under a nitrogen atmosphere. EDC.HCl (5.51 g, 28.8 mmol) was added to the mixture and the reaction was allowed to reflux overnight under a nitrogen atmosphere. The reaction was then extracted with 5% citric acid (2×), saturated aqueous sodium bicarbonate (2×), and brine (1×), dried over MgSO4, filtered, and concentrated in vacuo to obtain a solid (9.46 g, 99%) that was used without further purification.
