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    • 9. 发明授权
    • Process for preparation of 6,11-dihydro-11-oxodibenz[b,e]oxepinacetic
acids
    • 制备6,11-二氢-11-氧代二苯并[b,e]氧杂乙酸的方法
    • US4417063A
    • 1983-11-22
    • US264482
    • 1981-05-18
    • Thomas B. K. LeeGeorge E. LeeGregory M. Jobin
    • Thomas B. K. LeeGeorge E. LeeGregory M. Jobin
    • C07C59/68C07D313/12
    • C07C59/68C07D313/12
    • A method for the preparation of 6,11-dihydro-11-oxodibenz[b,e]oxepin-acetic acids having pharmaceutical activity is disclosed. Compounds represented by the formula: ##STR1## wherein R is OH or Cl are provided as intermediates. An aldehyde of the formula: ##STR2## wherein R.sub.1 is a lower alkyl, e.g., 1 to 4 carbon atoms, is reacted with chloroform and aqueous base to form an .alpha.-hydroxy dicarboxylic acid. Alternatively, the aldehyde can be converted to the corresponding cyanohydrin, which is then converted to the corresponding .alpha.-hydroxy dicarboxylic acid. The .alpha.-hydroxy dicarboxylic acid can also be prepared from reaction of a halogenated toluate of the formula: ##STR3## wherein X is Cl or Br with mandelic acid or a derivative thereof of the formula: ##STR4## wherein R.sub.3 and R.sub.4 are independently selected from hydrogen and alkyl of 1 to 4 carbon atoms. The .alpha.-hydroxy dicarboxylic acid is cyclized and then converted to the oxepin acetic acid by reduction. Alternatively, the .alpha.-hydroxy dicarboxylic acid is cyclized and converted to an .alpha.-chloro-substituted oxepin acetic acid, which is then converted to the unsubstituted oxepin acetic acid by reductive removal of chlorine.
    • 公开了制备具有药物活性的6,11-二氢-11-氧代二苯并[b,e]氧杂七环素 - 乙酸的方法。 由下式表示的化合物:其中R是OH或Cl,作为中间体。 其中R 1是低级烷基,例如1至4个碳原子的下式的醛与氯仿和碱水溶液反应形成α-羟基二羧酸。 或者,醛可以转化成相应的氰醇,然后将其转化为相应的α-羟基二羧酸。 α-羟基二羧酸也可以通过下式的卤代甲酸甲酯:其中X是Cl或Br与下式的扁桃酸或其衍生物反应来制备:其中R 3和R 4独立地选自 从氢和1至4个碳原子的烷基。 将α-羟基二羧酸环化,然后通过还原转化成氧杂环丁烷乙酸。 或者,将α-羟基二羧酸环化并转化成α-氯取代的氧杂环丁酸乙酸,然后通过还原性除去氯而将其转化为未取代的氧杂环庚烯乙酸。