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    • 5. 发明授权
    • Process for producing
1-(2'-deoxy-.beta.-D-erythro-pentofuranosyl)-5-trifluoromethyluracil
derivatives
    • 1-(2'-脱氧-β-D-赤型 - 呋喃戊糖基)-5-三氟甲基尿嘧啶衍生物的制备方法
    • US5532349A
    • 1996-07-02
    • US275455
    • 1994-07-15
    • Nobuya KawauchiNobuyuki FukazawaHiroki IshibashiKengo Otsuka
    • Nobuya KawauchiNobuyuki FukazawaHiroki IshibashiKengo Otsuka
    • C07H19/06C07H19/073A61K31/70
    • C07H19/06
    • A process for producing 1-(2'-deoxy-B-D-erythropentofuranosyl)-5-trifluoromethyluracil derivatives having the formula as shown below: ##STR1## wherein X.sup.1 and X.sup.2 are independently hydrogen or halogen, comprising:(a) reacting 5-trifluoromethyl-5,6-dihydrouracil with alkylsulfoxide in the presence of a halogen and and acid to obtain 5-trifluoromethyluracil;(b) reacting the obtained 5-trifluoromethyluracil with a silylating agent to obtain 5-trifluoromethyl-2,4 -bis(trimethylsilyloxy)uracil; and(c) reacting the obtained 5-trifluoromethyl-2,4-bis(trimethylsilyloxy)uracil with a protected 2-deoxyalpha-D-erthro-pentofuranosyl)halide derivative in chloroform solvent in the presence of fluoride ion and in the presence of a copper compound as a catalyst.The resulting, deblocked nucleosides are useful as antiviral and antitumor agents.
    • 一种制备具有下式的1-(2'-脱氧-β-赤式呋喃糖基)-5-三氟甲基尿嘧啶衍生物的方法:其中X1和X2独立地是氢或卤素,包括:(a)使5-三氟甲基 -5,6-二氢尿嘧啶与烷基亚砜在卤素存在下反应,得到5-三氟甲基尿嘧啶; (b)使所得5-三氟甲基尿嘧啶与甲硅烷基化试剂反应,得到5-三氟甲基-2,4-双(三甲基甲硅烷氧基)尿嘧啶; 和(c)使得到的5-三氟甲基-2,4-双(三甲基甲硅烷氧基)尿嘧啶与受保护的2-脱氧-α-D-戊硫基呋喃糖基)卤化物衍生物在氯仿溶剂中,在氟离子存在下,在 铜化合物作为催化剂。 所得到的解封核苷可用作抗病毒和抗肿瘤剂。