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    • 8. 发明申请
    • Process for producing cyclic compound
    • 环状化合物的制备方法
    • US20050209450A1
    • 2005-09-22
    • US10508659
    • 2003-03-26
    • Akira Kaneko
    • Akira Kaneko
    • C07D403/12C07D499/00C07D499/04C07D501/00C07D501/02C07D503/02C07D505/02C07D487/08
    • C07D403/12C07D499/00C07D501/00
    • The present invention provides a method for preparing a β-lactam compound of the following Formula (3), which comprises the step of reacting a compound of the following Formula (1) with a trialkyl phosphite represented by the formula (R5O)3P (wherein R5 represents an ethyl group, etc.) in an amount of 2 to 5 moles per mole of the compound and the step of heating the resulting reaction mixture in a diluent, wherein said method is characterized by having the step of completely removing unreacted trialkyl phosphite from the reaction mixture prior to the step of heating. (wherein X represents S, etc., Y represents N, etc., n represents 0 or 1, R1 represents an optionally substituted alkyl group containing 1 to 10 carbon atoms, etc., R2 and R3 each represent an optionally substituted alkyl or heterocyclic group, etc., and R4 represents an alkenyloxy group containing 1 to 6 carbon atoms, etc., provided that R1 and R2 may together form a β-lactam ring, etc.)
    • 本发明提供了制备下式(3)的β-内酰胺化合物的方法,该方法包括下列步骤:使下式(1)的化合物与由式(R 5)表示的亚磷酸三烷基酯反应 O)3%P(其中R 5表示乙基等),每摩尔化合物为2至5摩尔,并且步骤 将所得反应混合物加热到稀释剂中,其中所述方法的特征在于具有在加热步骤之前从反应混合物中完全除去未反应的亚磷酸三烷基酯的步骤。 (其中X表示S等,Y表示N等,n表示0或1,R 1表示任选取代的含有1至10个碳原子的烷基等,R 0 > 2和R 3各自表示任选取代的烷基或杂环基等,R 4表示含有1至6个碳原子的链烯氧基, 等等,条件是R 1和R 2可以一起形成β-内酰胺环等)