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    • 4. 发明申请
    • PROCESS FOR THE HYDROGENATION OF ESTERS OF ALPHA-SUBSTITUTED CARBOXYLIC ACIDS
    • 羟基取代的羧酸的加氢过程
    • WO2005023737A1
    • 2005-03-17
    • PCT/GB2004/003884
    • 2004-09-10
    • AVECIA LIMITEDMOODY, David, JohnHÄRRÖD, MagnusFIELDHOUSE, Robin
    • MOODY, David, JohnHÄRRÖD, MagnusFIELDHOUSE, Robin
    • C07C29/149
    • C07C29/149C07C67/31Y02P20/544C07C69/675C07C31/22C07C31/205
    • There is provided a process for the hydrogenation of esters of alpha-substituted carboxylic acids which comprises reacting an ester of an alpha-substituted carboxylic acid with hydrogen in the presence of a catalyst under substantially homogeneous supercritical conditions. Preferably, the ester of an alpha-substituted carboxylic acids is an ester of formula (1): wherein: R 1 and R 2 are each independently an optionally substituted hydrocarbyl group or an optionally substituted heterocyclic group; and Y is a heteroatom or an optionally substituted heteroatom group. More preferably, the ester of an alpha-substituted is carboxylic acids is an ester of formula (2): wherein: R 3 is an optionally substituted hydrocarbyl group or an optionally substituted heterocyclic group; R 4 and R 5 are each independently hydrogen, an optionally substituted hydrocarbyl group or an optionally substituted heterocyclic group; Y is a heteroatom or an optionally substituted heteroatom group; Q is a functional group; and n 1. Most preferably, the ester of an alpha-substituted carboxylic acids is an ester of formula (3): wherein: R 3 and R 6 are each independently an optionally substituted hydrocarbyl group or an optionally substituted heterocyclic group; R 4 and R 5 are each independently hydrogen, an optionally substituted hydrocarbyl group or an optionally substituted heterocyclic group; Y is a heteroatom or an optionally substituted heteroatom group; and n 1.
    • 提供了α-取代羧酸酯的氢化方法,其包括在催化剂存在下,在基本上均匀的超临界条件下使α-取代的羧酸的酯与氢反应。 优选地,α-取代的羧酸的酯是式(1)的酯:其中:R 1和R 2各自独立地为任选取代的烃基或任选取代的杂环基; 并且Y是杂原子或任选取代的杂原子基团。 更优选地,α-取代的酯是羧酸是式(2)的酯:其中:R 3是任选取代的烃基或任选取代的杂环基; R 4和R 5各自独立地为氢,任选取代的烃基或任选取代的杂环基; Y是杂原子或任选取代的杂原子基团; Q是功能组; 最优选地,α-取代的羧酸的酯是式(3)的酯:其中:R 3和R 6各自独立地是任选取代的烃基或任选取代的杂环基 ; R 4和R 5各自独立地为氢,任选取代的烃基或任选取代的杂环基; Y是杂原子或任选取代的杂原子基团; 和n 1。