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    • 8. 发明申请
    • AN IMPROVED PROCESS FOR THE PREPARATION OF CLARITHROMYCIN
    • 改进氯雷他定的制备方法
    • WO2009023191A2
    • 2009-02-19
    • PCT/US2008/009633
    • 2008-08-11
    • TEVA PHARMACEUTICAL INDUSTRIES LTD.TEVA PHARMACEUTICALS USA, INC.KANSAL, Vinod, KumarMISTRY, Dhirenkumar, N.GANDHI, MiteshPATEL, Rakesh
    • KANSAL, Vinod, KumarMISTRY, Dhirenkumar, N.GANDHI, MiteshPATEL, Rakesh
    • C07H17/08C07H1/00
    • The present invention includes a process involving a one-pot reaction for preparing erythromycin 9-oxime salt comprising: (a) reacting erythromycin thiocyanate with an ammonium source to obtain erythromycin free base; (b) oximating the C-9 carbonyl of the erythromycin free base by reacting the erythromycin free base with triethylamine and hydroxyl amine hydrochloride to form erythromycin oxime; and (c) reacting the erythromycin oxime obtained in step (b) with an ammonium source to obtain the erythromycin 9-oxime salt. The present invention is also drawn to a one-pot reaction for preparing clarithromycin starting with the one-pot reaction for preparing erythromycin 9-oxime salt, further comprising after step (c): (d) silylating the hydroxy groups at the oxime group, and the 2" and 4> λ positions of the erythromycin 9-oxime salt to obtain a silylated derivative; (e) methylating the hydroxy group at the 6 position of the silylated derivative using at least one methylating agent in the presence of at least one inorganic base to obtain SMOP, wherein SMOP is 6-O-methyl-2', 4"-bis(trimethylsilyl)- erythromycin A 9-O-(2-methoxyprop-2-yl)oxime; and (f) converting the SMOP into clarithromycin using at least one deoximating agent in the presence of aqueous ethanol.
    • 本发明包括一种用于制备红霉素9-肟盐的一锅反应的方法,包括:(a)将红霉素硫氰酸盐与铵源反应以获得游离红霉素的碱; (b)通过使红霉素游离碱与三乙胺和羟胺盐酸盐反应,使红霉素游离碱的C-9羰基肟化,形成红霉素肟; 和(c)使步骤(b)中获得的红霉素肟与铵源反应,得到红霉素9-肟盐。 本发明还涉及从用于制备红霉素9-肟盐的一锅反应开始制备克拉霉素的一锅反应,还包括在步骤(c)之后:(d)使肟基上的羟基甲硅烷基化, 和红霉素9-肟盐的2“和4”→位置,以获得甲硅烷基化衍生物;(e)使用至少一种甲基化试剂在甲硅烷基化衍生物的6位甲基化存在下, 无机碱以获得SMOP,其中SMOP为6-O-甲基-2',4“ - 双(三甲基甲硅烷基) - 红霉素A 9-O-(2-甲氧基丙-2-基)肟; 和(f)在含水乙醇的存在下使用至少一种去肟剂将SMOP转化成克拉霉素。