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    • 50. 发明申请
    • PRODUCTION OF 5-MEMBERED AND 6-MEMBERED CYCLIC ESTERS OF POLYOLS
    • 制备多组分5份和6份环状酯
    • US20110071305A1
    • 2011-03-24
    • US12993143
    • 2009-05-28
    • Stephen HowardAlexandra Sanborn
    • Stephen HowardAlexandra Sanborn
    • C07D493/04
    • C07D493/04C07D493/22Y02P20/582
    • Described herein are improved methods for the preparation of 5- and 6-membered cyclic mono and diesters of sugar alcohols and anhydrosugar alcohols by reaction with an organic acid RCOOH over a solid acidic substrate. The process is adaptable to a continuous process for simultaneously making and separating the cyclic esters from the sugar alcohols and anhydrosugar alcohols under mild conditions using the solid acid substrate as both the catalyst and a chromatographic bed for separation. The reactions are performed at mild temperatures of 700 C to 1000 C and the formation of the cyclic esters is nearly quantitative. Also described is a method for making 5- and 6-membered cyclic mono and diesters of sugar alcohols and anhydrosugar alcohols using microwave irradiation in the presence of the organic acid.
    • 本文描述了通过在固体酸性底物上与有机酸RCOOH反应来制备糖醇和脱水糖醇的5-和6-元环状单酯和二酯的改进方法。 该方法适用于在温和条件下使用固体酸底物作为催化剂和用于分离的色谱床同时制备和分离环状酯与糖醇和脱水糖醇的连续方法。 反应在700℃至1000℃的温和温度下进行,环酯的形成几乎是定量的。 还描述了在有机酸存在下使用微波辐射制备糖醇和脱水糖醇的5-和6-元环状单酯和二酯的方法。