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    • 6. 发明授权
    • Method for preparing 4-(6-amino-purin-9-YL)-2(S)-hydroxy-butyric acid methyl ester
    • 制备4-(6-氨基嘌呤-9-YL)-2(S) - 羟基 - 丁酸甲酯的方法
    • US08247549B2
    • 2012-08-21
    • US12747312
    • 2008-11-06
    • Fajun NanJianping ZuoYangming ZhangMin GuWei Tang
    • Fajun NanJianping ZuoYangming ZhangMin GuWei Tang
    • C07D473/34
    • C07D473/34Y02P20/55
    • The present invention discloses a novel method for preparing and purifying 4-(6-Amino-purin-9-yl)-2(S)-hydroxy-butyric acid methyl ester. The preparation started from cheap and easily available L-malic acid, which was transformed to intermediate I after simultaneous protection of the groups of 1-carboxyl and 2-hydroxyl. The intermediate I was selectively reduced to intermediate alcohol II, whose hydroxyl group was further transformed to an easily leaving group to afford intermediate III. The intermediate III was nucleophilically substituted with adenine to afford intermediate IV. The intermediate IV was deprotected and methyl-esterified simultaneously in methanol in the presence of an acid or a base to afford crude 4-(6-Amino-purin-9-yl)-2(S)-hydroxy-butyric acid methyl ester, which was purified by recrystallization to afford the purified product. Comparing with the prior preparation methods, the present method has advantages in low cost, mild conditions, high retention of the chiral center during the reaction, high productivity, great improvement in the quality and yield of the product and great decrease in cost, and thus is suitable for the production on a large scale.
    • 本发明公开了一种制备和纯化4-(6-氨基嘌呤-9-基)-2(S) - 羟基 - 丁酸甲酯的新方法。 该制剂从便宜且易于获得的L-苹果酸开始,其在同时保护1-羧基和2-羟基的基团后转化为中间体I. 将中间体I选择性还原成中间体醇II,其中羟基进一步转化为容易离去的基团,得到中间体III。 中间体III被腺嘌呤亲核取代,得到中间体IV。 将中间体IV在酸或碱的存在下在甲醇中同时脱甲基酯化,得到粗制的4-(6-氨基 - 嘌呤-9-基)-2(S) - 羟基 - 丁酸甲酯, 通过重结晶纯化,得到纯化产物。 与现有的制备方法相比,本发明方法具有成本低,条件温和,反应中手性中心保留性高,生产效率高,产品质量和产量大幅提高,成本大幅降低的优点, 适合大规模生产。
    • 10. 发明申请
    • Triptolide Derivatives And Their Uses
    • 雷公藤内酯衍生物及其用途
    • US20070197476A1
    • 2007-08-23
    • US10540908
    • 2003-01-28
    • Yuanchao LiJianping ZuoFan ZhangRu ZhouJian Ding
    • Yuanchao LiJianping ZuoFan ZhangRu ZhouJian Ding
    • A61K31/675A61K31/365C07D493/22
    • C07D493/22A61K31/34
    • The invention relates to triptolide derivatives of Formula (I), their pharmaceutically acceptable salts and optical isomers, Formula (I): wherein, C5 and C6 connect with each other by a C—C single bond or double bond; when C5 and C6 are connected with C—C single bond, X and Y represents independently hydrogen, oxygen, hydroxyl, halogen, lower alkyl-oxy, lower alkyl-amino, mercapto, lower alkyl-thio, the group of formula —OCOR, —OSO2R or —OPO(OH)2, each of which is attached to C5 and C6, R represents —(CH2)nCO2Na, —(CO2)nCO2K, or —(CH2)nCH3, wherein n=1-6; Z represents hydrogen, oxygen, hydroxyl, halogen, lower alkyl-oxy, lower alkyl-amino, mercapto, lower alkyl-thio, the group of formula —OCOR, —OSO2R or —OPO(OH)2, each of which is linked at C14-position, R represents —(CH2)nCO2Na, —(CO2)nCO2K, or —(CH2)nCH2, wherein n=1-6; wherein, the “_” linked with X, Y, and Z represents “” or “”, but X and Y cannot both be hydrogen atom at the same time, the methods for preparing them and their use as antiphlogistic agent, immunosuppressive agent or therapeutic agent for other related diseases.
    • 本发明涉及式(I)的雷公藤内酯衍生物,其药学上可接受的盐和旋光异构体,式(I):其中C5和C6通过C-C单键或双键相互连接; 当C5和C6与CC单键连接时,X和Y独立地表示氢,氧,羟基,卤素,低级烷基氧基,低级烷基 - 氨基,巯基,低级烷基 - 硫基,式-OCOR基团,-OSO (OH)2 N,其各自与C5和C6连接,R表示 - (CH 2)nCO 2, Na 2, - (CO 2)n CO 2 K,或 - (CH 2 2)n CH 3 其中n = 1-6; Z代表氢,氧,羟基,卤素,低级烷基 - 氧基,低级烷基 - 氨基,巯基,低级烷基 - 硫基,式-OCOR,-OSO 2 R或-OPO(OH )2,其各自在C14位连接,R表示 - (CH 2)n CO 2 Na, - (CO 2 N 2)n CO 2 K,或 - (CH “或”“,但X和Y不能同时为氢原子, 制备它们及其用作消炎剂,免疫抑制剂或其他相关疾病的治疗剂。