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    • 1. 发明申请
    • Pharmaceutical composition for controlled release of an active ingredient
    • 用于控制释放活性成分的药物组合物
    • US20020103181A1
    • 2002-08-01
    • US09726636
    • 2000-11-30
    • LUPIN LABORATORIES LIMITED
    • Himadri SenRajesh Suresh KshirsagarChandrashekhar Shriram KandiShailesh Suresh Bhamare
    • A61K031/545
    • A61K31/545A61K9/205A61K9/209
    • A pharmaceutical composition in the form of a tablet for controlled release of an active ingredient comprises a betalactam antibiotic such as cephalexin, cefaclor or their pharmaceutically acceptable hydrates, salts or esters as active ingredient, and a mixture of hydrophilic polymers selected from the group consisting of at least one sodium alginate and at least one xanthan gum as controlled release matrix; and optionally probenecid as an antibiotic adjuvant as either immediate release or controlled release part. The composition may also contain one or more of a water soluble and/or water dispersible diluent, wherein the quantities of the hydrophilic polymers and water soluble and/or water dispersible diluents are such that the therapeutically effective active ingredient is released at a rate suitable for once or twice daily administration of the pharmaceutical composition. Inclusion of probenecid allows reduction in the amount of active incorporated in the hydrophilic polymer matrix but still provides the desired once a day profile. The resulting modified release matrix formulation not containing probenecid may be administered once or twice daily. The resulting modified release matrix formulation containing probenecid may be administered once daily.
    • 用于控制释放活性成分的片剂形式的药物组合物包括β-内酰胺抗生素如头孢氨苄,头孢克洛或其药学上可接受的水合物,盐或酯作为活性成分,以及选自以下的亲水性聚合物的混合物: 至少一种藻酸钠和至少一种黄原胶作为受控释放基质; 和可选地作为抗生素佐剂的丙磺舒作为立即释放或控制释放部分。 组合物还可以含有一种或多种水溶性和/或水分散性稀释剂,其中亲水性聚合物和水溶性和/或水分散性稀释剂的量使得治疗有效的活性成分以适合于 每天一次或两次给药药物组合物。 包含丙磺舒可以减少亲水性聚合物基质中掺入的活性物质,但仍能提供所需的一天一次。 不含丙磺舒的所得改性释放基质制剂可以每天施用一次或两次。 含有丙磺舒的所得改性释放基质制剂可以每天施用一次。
    • 7. 发明公开
    • An improved method for the preparation of 2-chloro sulfinyl azetidin-4-one
    • Verbidityes Verfahren zur Herstellung von 2-Chlorosulfinylazetidin-4-on。
    • EP0659742A1
    • 1995-06-28
    • EP94309773.3
    • 1994-12-23
    • LUPIN LABORATORIES LIMITED
    • Gupta, Niranjan Lal, Lupin Laboratories LimitedSankaran, Ramanathan, Lupin Laboratories LimitedSitabkhan, Sakina, Lupin Laboratories Limited
    • C07D205/095C07D409/12C07D501/00
    • C07D409/12C07D205/095C07D501/00Y02P20/55
    • An improved method for the preparation of 2-chloro sulfinyl azetidin-4-one of the general formula:

      wherein R is hydrogen; C₁-C₃ alkyl; halomethyl; cyanomethyl; phenyl, substituted phenyl, phenoxy, benzyloxy or substituted benzyl with the substituent group selected from halo, alkyl, alkoxy, protected hydroxy, nitro, cyano and trifluoromethyl; a group of the formula R₂ -- O -- wherein R₂ is t-butyl, 2,2,2- trichloroethyl, benzyl or substituted benzyl; a group of the formula R₃-(O) n -CH₂ wherein R₃ is phenyl or substi-tuted phenyl with the substituent group selected from halo, alkyl, alkoxy, protected hydroxy, nitro, cyano or trifluoromethyl, 2-thienyl, 3-thienyl, 2-furyl, 3-furyl or 1,4-cyclohexadienyl, and n is 0 or 1; or a substituted aryl alkyl group of of formula

      wherein R₄ has the same meaning as R₃ defined above and W is a protected hydroxy or protected amino group; and R₁ is a carboxylic acid protecting group selected from the group consisting of C₁-C₄ alkyl, 2,2,2-trihalo alkyl, benzyl, substituted benzyl, like p-nitrobenzyl, phenacyl, halo substituted phenacyl and benzhydryl, is disclosed. Such compound is prepared by reacting a penicillin sulfoxide ester of the general formula

      wherein R and R₁ have the meanings defined above with an N-chloro halogenating agent in an inert organic solvent. The reaction is carried out in the presence of an acid scavening amount of a phosphate or hydrogen phosphate of an alkali metal, alkaline earth metal, ammonium, quaternary ammonium or mixtures of any thereof. These compounds find application as an intermediate in the production of cefaclor which are powerful anti-bacterial compounds.
    • 一种制备2-氯亚硫酰基氮杂环丁烷-4-酮的改进方法,其通式为:其中R为氢; C1-C3烷基; 卤; 氰; 苯基,取代的苯基,苯氧基,苄氧基或取代的苄基与选自卤素,烷基,烷氧基,保护的羟基,硝基,氰基和三氟甲基的取代基取代; 式R 2 -O - 的基团,其中R 2是叔丁基,2,2,2-三氯乙基,苄基或取代的苄基; 式R3-(O)n-CH2的基团,其中R3是苯基或具有选自卤素,烷基,烷氧基,保护的羟基,硝基,氰基或三氟甲基的取代基的苯基,2-噻吩基,3-噻吩基 ,2-呋喃基,3-呋喃基或1,4-环己二烯基,n为0或1; 或具有式CHEM的取代的芳基烷基,其中R 4具有与上述定义的R 3相同的含义,W是受保护的羟基或被保护的氨基; R1是选自C1-C4烷基,2,2,2-三卤代烷基,苄基,取代的苄基,如对硝基苄基,苯甲酰甲基,卤素取代的苯甲酰甲基和二苯甲基的羧酸保护基。 通过使惰性有机溶剂中的具有上述定义的R和R 1具有N-氯卤化剂的通式的青霉素亚砜酯反应来制备该化合物。 该反应在酸清除量的碱金属,碱土金属,铵,季铵的磷酸盐或磷酸氢盐或其混合物的存在下进行。 这些化合物可用作生产头孢克洛的中间体,它们是强大的抗菌化合物。