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    • 2. 发明授权
    • Method for making photocurable halofluorinated acrylates
    • 制备可光固化的氟氟化丙烯酸酯的方法
    • US6166156A
    • 2000-12-26
    • US190194
    • 1998-11-12
    • Chengjiu WuBaopei XuJames T. Yardley
    • Chengjiu WuBaopei XuJames T. Yardley
    • G02B6/12C07C29/147C07C29/149C07C31/42C07C51/093C07C51/285C07C55/32C07C67/08C07C67/14C07C69/63C07C69/653C08F8/00C08F8/04C08F8/06C08F8/26C08F14/18C08G63/682C08G64/10C08G69/42C08F20/22C08F6/00C08F120/22C08F220/22
    • C07C51/285C07C29/149C07C31/42C07C67/08C07C69/653C08F8/00C08F8/04C08F8/06C08F8/10C08F8/14C08F2800/10C08F2810/30Y10S526/914C07C55/32C07C69/63C08F20/00C08F214/24
    • Halofluorinated alkylene monomers are made by a method comprising the steps of: (a) subjecting a first polymer which is the reaction product of a fluorinated vinyl monomer and a vinyl comonomer to dehydrohalogenation to form a second polymer; (b) treating the second polymer with an oxidizing agent to form an oxidation product consisting of a .alpha., .omega.-dicarboxylic acid or an ester derivative thereof; and (c) treating said oxidation product with a reducing agent to form a reduction product consisting of a a .alpha., .omega.-diol. Preferably, the first polymer has a structure of --[CH.sub.2 CYZ(CF.sub.2 CFX).sub.n ].sub.m -- wherein X and Y=F, Cl or Br; X and Y may be the same or different; Z=H, F, Cl, Br, alkyl or perfluoroalkyl containing from about 1 to about 10 carbon atoms; n=an integer larger than about 1; and m is an integer between about 2 and about 10.sup.5. The .alpha., .omega.-dicarboxylic acids and .alpha., .omega.-diols produced herein can be directly used as polycondensation monomers. Alternatively, the .alpha., .omega.-dicarboxylic acids and .alpha., .omega.-diols can be further derivitized to tri-, tetra- or other multifunctional alcohols which may be directly used as condensation monomers or they may be converted to acrylates which may be photocured in the presence of a radical photoinitiator into transparent polymers which are useful as optical waveguiding materials.
    • 通过包括以下步骤的方法制备卤代亚烷基单体:(a)使作为氟化乙烯基单体和乙烯基共聚单体的反应产物的第一聚合物进行脱卤化氢以形成第二聚合物; (b)用氧化剂处理第二聚合物以形成由α,ω-二羧酸或其酯衍生物组成的氧化产物; 和(c)用还原剂处理所述氧化产物以形成由α,ω-二醇组成的还原产物。 优选地,第一聚合物具有 - [CH 2 CYZ(CF 2 CFX)n] m - 的结构,其中X和Y = F,Cl或Br; X和Y可以相同或不同; Z = H,F,Cl,Br,含有约1至约10个碳原子的烷基或全氟烷基; n =大于1的整数; m为约2至约105的整数。本文生产的α,ω-二羧酸和α,ω-二醇可直接用作缩聚单体。 或者,可以将α,ω-二羧酸和α,ω-二醇进一步衍生为可以直接用作缩合单体的三元,四元或其它多官能醇,或者它们可以转化成丙烯酸酯,其可以在 将自由基光引发剂存在于用作光波导材料的透明聚合物中。
    • 7. 发明授权
    • Method for preparing L-carnitine
    • L-肉毒碱的制备方法
    • US4413142A
    • 1983-11-01
    • US358326
    • 1982-03-15
    • Mario FioriniClaudio Valentini
    • Mario FioriniClaudio Valentini
    • C07C227/26C07C29/10C07C31/42C07C229/22C07D317/20C07C101/30
    • C07C255/00C07C29/103C07C31/42C07D317/20C07B2200/07
    • L-carnitine is prepared by a synthesizing process starting from D-mannitol. The synthesis is started with the formation of a D-mannitol ketonide (more specifically D-mannitol acetonide from D-mannitol and acetone, whereafter the D-mannitol is split by oxidation to give glyceraldehyde acetonide, which is further reduced to glycerol acetonide. Then the free hydroxyl group is exchanged with a halogen atom (chlorine) with the formation of chlorodihydroxy propane, the primary alcoholic group of which is functionalized with the acid chloride of a sulfonic acid (tosylchloride). The reaction of the tosyl derivative with the salt of hydrogen cyanide leads to the formation of the corresponding nitrile which, when reacted with trimethylamine gives carnitinonitrile. The nitrile group is now hydrolyzed to give L-carnitine chloride. The formation of L-carnitine can then be obtained by exchanging the chloride ion with a hydroxyl ion.
    • L-肉碱通过从D-甘露糖醇开始的合成方法制备。 从D-甘露糖醇和丙酮形成D-甘露醇酮酮(更具体地说是D-甘露糖醇缩酮化合物)开始合成,然后通过氧化将D-甘露糖醇分裂,得到甘油醛缩酮,进一步还原成甘油丙酮化物 游离羟基与卤素原子(氯)交换,形成氯二羟基丙烷,其主要的醇基被磺酸(甲苯磺酰氯)的酰氯官能化,甲苯磺酰基衍生物与盐 氰化氢导致相应的腈的形成,当与三甲胺反应产生肉碱腈时,腈基现在被水解以得到L-肉碱氯化物,然后可以通过将氯离子与羟基交换来获得左旋肉碱的形成 离子。