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The organic layers were dried over anhydrous sodium sulfate, filtered, and concentrated to provide an orange foam.To the crude material 0.39 g was added sodium acetate 0.082 g, 1.0 mmol, ethanol 3.4 ml, and methyl 2-bromoacetate 0.10 ml, 1.0 mmol.The reaction mixture was heated at 65 c.For 3.
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