Efficient and Convenient Synthesis of Diethers from Furoin Under Ultrasound and Solid-liquid Phase Transfer Catalysis Conditions

<正>Introduction Compounds having an active hydroxy group,such as,acyloins can be easily alkylated by alkyl halides in the presence of a phase transfer catalyst(PTC).The reaction is usually carried out in the presence of concentrated aqueous sodium or potassium hydroxide and a phase transfer catalyst,such as,quaternary ammonium