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    • 28. 发明公开
    • SYNTHESIS OF CYCLOALKYLDIARYLPHOSPHINES
    • 环烷基二芳基磷杂环戊二烯的合成
    • EP0889896A1
    • 1999-01-13
    • EP97916918.0
    • 1997-03-24
    • ALBEMARLE CORPORATION
    • SENARATNE, K., Pushpananda, A.MALCOLM, Arcelio, J.ORIHUELA, Felix, M.ELNAGAR, Hassan, Y.
    • C07F9
    • C07F9/5077
    • Partially sterically-hindered cycloalkyl chlorides are reacted with lithium diarylphosphides in inert liquid hydrocarbon reaction media to form cycloalkyldiarylphosphines. Aryl lithium is coproduced. The process makes it possible to avoid, or at least substantially eliminate, the interaction with or cleavage of cyclic ether reaction media such as tetrahydrofuran, previously the solvent of choice for conducting this type of reaction. Also during the conduct of the present process the chloro-substituted cycloalkane does not undergo any appreciable reaction with the coproduced aryl lithium as it is formed. Thus improvements both in yield and quality of the cycloalkyldiarylphosphine product are made possible. A comprehensive three-step process for converting triarylphosphine to cycloalkyldiarylphosphine is also described.
    • 部分空间位阻的环烷基氯化物与锂二芳基磷化物在惰性液体烃反应介质中反应形成环烷基二芳基膦。 芳基锂是联产的。 该方法可以避免或者至少基本上消除环醚反应介质如四氢呋喃与预先用于进行这类反应的溶剂的相互作用或裂解。 在进行本发明方法的过程中,氯取代的环烷烃在形成时与联产生的芳基锂不发生明显的反应。 因此,环烷基二芳基膦产物的收率和质量的改善成为可能。 还描述了将三芳基膦转化为环烷基二芳基膦的综合三步法。