... Page 3. Notes J. Org. Chem., Vol. 48, No. ... wi32-95-4. room temperature, the solution stood for 2 h. Extraction with 150 mL of 0.5 N HC1, washing of the organic layer to neutrality, drying (anhydrous Na2S04), and evaporation under reduced pressure at 75 "C for 1.5 h gave an oil. ...