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    • 4. 发明专利
    • Method for producing 2,6-dichloropurine
    • 2,6-二氯乙烯生产方法
    • JP2008266201A
    • 2008-11-06
    • JP2007111040
    • 2007-04-19
    • Nippon Soda Co Ltd日本曹達株式会社
    • KOMATSU FUMIYOSHIOGUCHI TETSUSHIKAWACHI JUNICHI
    • C07D473/40
    • PROBLEM TO BE SOLVED: To provide a method for producing 2,6-dichloropurine, by which the 2,6-dichloropurine can be obtained in a high yield, while inhibiting the by-production of explosible methyl hypochlorite and the like.
      SOLUTION: This method for producing the 2,6-dichloropurine comprises mixing 2,6-dithiopurine with hydrochloric acid to obtain an alcohol-free suspension, blowing chlorine in the suspension to obtain 2,6-dichloropurine hydrochloride solution, cooling the solution to crystallize the 2,6-dichloropurine hydrochloride, suspending the crystals of the 2,6-dichloropurine hydrochloride in water, raising the pH of the suspension to ≥8 to dissolve the crystals of the 2,6-dichloropurine hydrochloride, and then adjusting the pH of the solution to 4 to 7 to purify the 2,6-dichloropurine.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 待解决的问题:提供一种2,6-二氯嘌呤的制备方法,通过该方法可以高收率地获得2,6-二氯嘌呤,同时抑制可爆炸的甲基次氯酸盐等的副产物。 解决方案:该2,6-二氯嘌呤的制造方法包括将2,6-二硫嘌呤与盐酸混合以获得无醇悬浮液,在悬浮液中吹入氯,得到2,6-二氯嘌呤盐酸盐溶液,冷却 溶液使2,6-二氯嘌呤盐酸盐结晶,将2,6-二氯嘌呤盐酸盐的晶体悬浮于水中,将悬浮液的pH升高至≥8以溶解2,6-二氯嘌呤盐酸盐的晶体,然后调节 将溶液的pH调至4至7以纯化2,6-二氯嘌呤。 版权所有(C)2009,JPO&INPIT
    • 6. 发明专利
    • Method for producing 3,7(9)-dihydro-1h-purine-2,6-dithione compound
    • 制备3,7(9) - 二氢-1H-嘌呤-2,6-二氧化物的方法
    • JP2006001892A
    • 2006-01-05
    • JP2004180829
    • 2004-06-18
    • Nippon Soda Co Ltd日本曹達株式会社
    • KOMATSU FUMIYOSHIHATANO MASAMIOGUCHI TETSUSHI
    • C07D473/20
    • PROBLEM TO BE SOLVED: To provide a method for industrially advantageously producing a 3,7-dihydro-1H-purine-2,6-dithione compound or a 3,9-dihydro-1H-purine-2,6-dithione compound important as a production intermediate of various kinds of purine derivatives exemplified by adenine and guanine of constituent components of nucleic acids.
      SOLUTION: The method for producing the compound represented by formulas (Ia) or (Ib) involves (1) reacting a compound represented by formulas (IIa) or (IIb) with a compound represented by formula (III), or (2) reacting a compound represented by formulas (IIa) or (IIb) with carbon disulfide and a compound represented by R
      4 OH in the presence of an inorganic base, in a polar solvent. (In the formulas, R
      1 and R
      2 are each independently a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent; R
      3 is a hydrogen atom, a 1-10C alkyl group or an alkali metal atom; R
      4 is a hydrogen atom or a 1-10C alkyl group; and M is an alkali metal atom or the like).
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 待解决的问题:提供一种工业上有利地制备3,7-二氢-1H-嘌呤-2,6-二硫代化合物或3,9-二氢-1H-嘌呤-2,6-二硫酮的方法 作为核酸的构成成分的腺嘌呤和鸟嘌呤示例的各种嘌呤衍生物的生产中间体是重要的。 解决方案:由式(Ia)或(Ib)表示的化合物的制备方法包括:(1)使由式(IIa)或(IIb)表示的化合物与式(III)表示的化合物或( 2)在极性溶剂中,在无机碱的存在下,使由式(IIa)或(IIb)表示的化合物与二硫化碳和由R SPM 4表示的化合物反应。 (式中,R SP 1和R SP 2各自独立地为氢原子,可以具有取代基的烷基或可具有取代基的芳基; R 3 是氢原子,1-10C烷基或碱金属原子; R SP 4是氢原子或1-10C烷基; M是 碱金属原子等)。 版权所有(C)2006,JPO&NCIPI