Triphenylphosphine → 2-[5-Chloro-2-(3-methylisoxazol-5-ylmethoxy)benzyl]isoindole-1,3-dione

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To a mixture of 2-[5-chloro-2-hydroxy benzyl]isoindole-1,3-dione (800 mg, 2.78 mmol), 5-hydroxymethyl-3-methyl-isoxazole (373 mg, 3.3 mmol), and triphenylphosphine (1.0 g, 4.2 mmol) in anhydrous THF (10 mL) was added diethylazodicarboxylate (0.657 mL, 4.7 mmol). The solution was stirred for 15 h at room temperature under anhydrous conditions. The solvent was then removed by rotary evaporation and the product was preadsorbed onto silica gel and purified by flash chromatography to afford the title compound (555 mg, 52%).

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