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ʵÑé²½ÖèÈçÏ£º£º£ºTriethylamine (0.5 mol) and methacryloyl chloride (0.5mol), each in 150 ml of CH,Cl,, are added dropwise with stirring and ice cooling to N-hydroxysuccinimide (0.5 mol) in anhydrous methylene dichloride (200 ml). After 6 hours' stirring at room temperature the precipitated triethylammonium chloride is removed and the filtrate is shaken with, successively,water, a little saturated sodium hydrogen carbonate solution, and again water, dried and evaporated.The residue is recrystallized from ethyl acetate/light petroIeum ;yield 70 g (77%)
  
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