会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明授权
    • Process for producing optically active pyrrolidine derivatives
    • 光学活性吡咯烷衍生物的制备方法
    • US5942629A
    • 1999-08-24
    • US976491
    • 1997-11-24
    • Yoshifumi YuasaTsukasa SotoguchiNobuo Seido
    • Yoshifumi YuasaTsukasa SotoguchiNobuo Seido
    • B01J31/24C07B61/00C07D207/08C07D207/09C07D207/26
    • C07D207/08C07D207/09C07D207/26
    • A production process for obtaining optically active (3R,1'S)-1-benzyl-3-�(1'-N-methylamino)ethyl!pyrrolidine or (3R,1'S)-3-�(1'-N-methylamino)ethyl!pyrrolidine used as an intermediate for the synthesis of pharmaceutical preparations such as anti-fungal agents in high purity and in high yield using a reduced number of processing steps. The process comprises asymmetrically hydrogenating 3-acetyl-1-benzyl-2-pyrrolidinone in the presence of a complex formed from bidentate phosphine and ruthenium as a catalyst to provide (3S,1'R)-1-benzyl-3-�(1'-hydroxy)ethyl!-2-pyrrolidinone, then reducing with a hydride to provide (3R,1'R)-1-benzyl-3-�(1'-hydroxy)ethyl!pyrrolidine, mesylating or tosylating to provide (3R,1'R)-1-benzyl-3-�(1'-methanesulfonyloxy)ethyl!pyrrolidine or (3R,1'R)-1-benzyl-3-�(1'-p-toluenesulfonyloxy)ethyl!pyrrolidine, and reacting with methylamine to obtain (3R,1'S)-1-benzyl-3-�(1'-N-methylamino)ethyl!pyrrolidine. The prcess may further comprise de-benzylating (3R,1'S)-1-benzyl-3-�(1'-N-methylamino)ethyl!pyrrolidine to obtain (3R,1'S)-3-�(1'-N-methylamino)ethyl!pyrrolidine.
    • 制备光学活性(3R,1'S)-1-苄基-3 - [(1'-N-甲基氨基)乙基]吡咯烷或(3R,1'S)-3 - [(1'-N-甲基氨基)乙基 ]吡咯烷,其用作用于合成药物制剂例如抗真菌剂的中间体,其使用减少数量的加工步骤以高纯度和高产率。 该方法包括在二齿膦和钌作为催化剂形成的络合物存在下不对称氢化3-乙酰基-1-苄基-2-吡咯烷酮,得到(3S,1'R)-1-苄基-3 - [(1 然后用氢化物还原得到(3R,1'R)-1-苄基-3 - [(1'-羟基)乙基]吡咯烷,甲磺酰化或甲苯磺酸化,得到(3R ,1'R)-1-苄基-3 - [(1'-甲磺酰氧基)乙基]吡咯烷或(3R,1'R)-1-苄基-3 - [(1'-对甲苯磺酰氧基)乙基] 并与甲胺反应,得到(3R,1'S)-1-苄基-3 - [(1'-N-甲基氨基)乙基]吡咯烷。 进一步包括脱苄基化(3R,1'S)-1-苄基-3 - [(1'-N-甲基氨基)乙基]吡咯烷,得到(3R,1'S)-3 - [(1'-N-甲基氨基 )乙基]吡咯烷。
    • 8. 发明授权
    • Process for the production of optically active amino alcohols
    • 用于制备光学活性氨基醇的方法
    • US07038087B2
    • 2006-05-02
    • US10656617
    • 2003-09-04
    • Takahiro FujiwaraHideki NaraTsukasa Sotoguchi
    • Takahiro FujiwaraHideki NaraTsukasa Sotoguchi
    • C07C209/16C07C209/46C07C209/56
    • C07C269/00C07B2200/07C07C213/02C07C2601/08C07C2601/14Y02P20/55C07C215/44C07C271/24
    • An object of the present invention is to provide a process for the production of an optically active amino alcohol, particularly an optically active amino alcohol of a trans-form, being excellent in economy and efficiency, and suitable for industry using easily available and less expensive materials.The present invention relates to a process for the production of an optically active amino alcohol comprising the steps that an optically active hydroxy ester in a trans-form obtained by an asymmetric hydrogenation of an easily available β-keto ester is reacted with hydrazine, the resulting optically active hydrazinocarbonyl alcohol is subjected to a Curtius rearrangement in the presence of alcohol and protective group of amino group of the resulting optically active alkoxycarbonylamino alcohol is deprotected. As a result of the process for the production in accordance with the present invention, the objected substance is able to be prepared in a high optical purity and in a high yield.
    • 本发明的目的是提供一种制备光学活性氨基醇,特别是反式形式的光学活性氨基醇的方法,其经济性和效率优异,并且适用于易于获得和较便宜的工业应用 材料 本发明涉及一种制备光学活性氨基醇的方法,该方法包括以下步骤:通过易于获得的β-酮酯的不对称氢化获得的反式的光学活性羟基酯与肼反应,得到 光学活性肼基羰基醇在醇的存在下进行Curtius重排,并将得到的光学活性烷氧基羰基氨基醇的保护基的氨基脱保护。 作为根据本发明的生产方法的结果,可以以高光学纯度和高产率制备被
      反应物质。
    • 10. 发明授权
    • Process for producing optically active &ggr;-butyrolactone
    • 光学活性γ-丁内酯的制备方法
    • US06608214B2
    • 2003-08-19
    • US10199136
    • 2002-07-19
    • Tsukasa SotoguchiTakaji MatsumotoMotonobu TakenakaTakashi Miura
    • Tsukasa SotoguchiTakaji MatsumotoMotonobu TakenakaTakashi Miura
    • C07D30733
    • C07D307/33C07B2200/07C07C67/31Y02P20/55C07C69/734
    • This invention provides a novel process for producing optically active 3-hydroxy-&ggr;-butyrolactone in a short step, which is superior economically and in efficiency and industrially suitable by using a starting material which is inexpensive and easily available and reagents easy to handle. This invention relates to a process for producing optically active 3-hydroxy-&ggr;-butyrolactone represented by formula I: wherein the symbol * means an asymmetric carbon atom, which comprises hydrogenating an optically active 4-substituted oxy-3-hydroxybutyrate represented by formula II: wherein R1 represents a C1-4 lower alkyl group, R2 represents a protective group for a hydroxyl group deprotected by hydrogenation with a heterogeneous hydrogenation catalyst, and the symbol * has the same meaning as defined above, in the presence of a heterogeneous hydrogenation catalyst and an acidic substance followed by deprotection and simultaneous ring closure thereof.
    • 本发明提供了一种在短时间内制备光学活性3-羟基-γ-丁内酯的新方法,其经济性和效率都优异,在工业上适用于便宜且易于获得的试剂和易于处理的试剂。 本发明涉及一种由式I表示的光学活性3-羟基-γ-丁内酯的制备方法:其中符号*表示不对称碳原子,其包括将由式II表示的光学活性的4-取代的氧基-3-羟基丁酸 :其中R1表示C1-4低级烷基,R2表示通过异相氢化催化剂氢化脱保护的羟基的保护基,符号*具有与上述相同的含义,在非均相加氢催化剂存在下 和酸性物质,然后脱保护并同时闭环。