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    • 4. 发明授权
    • Method for the development of .delta.-lactones and hydroxy acids from
unsaturated fatty acids and their glycerides
    • 从不饱和脂肪酸及其甘油酯开发δ-内酯和羟基酸的方法
    • US6022982A
    • 2000-02-08
    • US211017
    • 1998-12-14
    • Terry A. IsbellSteven C. Cermak
    • Terry A. IsbellSteven C. Cermak
    • C07C51/09C07D315/00C07D309/00
    • C07D315/00C07C51/09
    • An improved process for the production of high yields of .delta.-lactones and 5-hydroxy fatty acids from unsaturated fatty acids such as oleic acid is disclosed. The .delta.-lactones may be produced by reacting one or more .DELTA..sup.9 to .DELTA..sup.15 unsaturated fatty acids in the presence of an acid catalyst and at a temperature between about 20 to 70.degree. C. Moreover, yields of the .delta.-lactones may be increased even further by reaction in the presence of dipolar, non-participating, non-aqueous solvents. The unsaturated fatty acids may be free or esterified with glycerol or other aliphatic alcohols, and the .delta.-lactones may be produced by reacting mono-, di- or triglycerides of the unsaturated fatty acids with the same catalysts. Because the .delta.-lactones may be produced from the triglycerides of unsaturated fatty acids, the instant process may be practiced using naturally occurring plant oils directly, without the need for any preliminary steps of saponification or steam splitting. Optionally, the .delta.-lactones so formed may be further reacted to produce 5-hydroxy fatty acids. These 5-hydroxy fatty acids may be produced by reaction of the .delta.-lactones with an alkali in an aqueous solution.
    • 公开了用于从不饱和脂肪酸如油酸生产高产量的δ-内酯和5-羟基脂肪酸的改进方法。 δ-内酯可以通过使一种或多种DELTA 9与DELTA 15不饱和脂肪酸在酸催化剂存在下反应并在约20至70℃之间的温度下反应来制备。此外,δ-内酯的产率可以增加 甚至通过在偶极非参与的非水溶剂的存在下进行反应。 不饱和脂肪酸可以与甘油或其它脂族醇一起游离或酯化,并且该β-内酯可以通过使不饱和脂肪酸的一,二或甘油三酸酯与相同的催化剂反应来制备。 因为δ-内酯可以由不饱和脂肪酸的甘油三酸酯生产,所以本方法可以使用天然存在的植物油直接进行,而不需要任何初步的皂化或蒸汽分解步骤。 任选地,如此形成的δ-内酯可进一步反应以产生5-羟基脂肪酸。 这些5-羟基脂肪酸可以通过δ-内酯与水溶液中的碱反应制备。