我们重新研究了刚果红类似物2,5-双(4'-羟基-3'-羧基-苯乙烯基)苯(X-34),以开发这种高荧光淀粉样染料,用于成像包括Aβ和Tau原纤维的阿尔茨海默氏病(AD)病理。通过用其他杂环部分取代X-34的中心苯单元,可以合成具有不同光学性质的配体。进行了完整的光物理表征,包括记录吸光度和荧光光谱,斯托克斯位移,量子产率和荧光寿命。所有配体对Aβ1-42(13-300 n m K d)和Tau(16-200 n m K d)的重组淀粉样原纤维都显示出高亲和力)以及对AD组织中与疾病相关的相应蛋白质聚集体的选择性。我们观察到这些配体有效地取代了重组Aβ1-42淀粉样蛋白原纤维中的X-34,但不能替代匹兹堡化合物B(PiB),认为刚果红型结合位点保留了靶向性。我们预见到,X-34支架提供了一种可能,以不同于PiB的方式开发人类AD脑中发现的Aβ病理学的新型高亲和力配体,从而有可能识别出不同的Aβ原纤维多态性。
[Problem] To provide a method of producing an aromatic amino compound by using a primary or secondary amine compound and a halogenated aromatic compound as starting materials, and relying upon the Ullmann reaction, the method being capable of obtaining the highly pure aromatic amino compound in high yields and inexpensively.
[Means for Solution] A method of producing an aromatic amino compound by using a primary or secondary amine compound having an aromatic ring group and a halogenated aromatic compound as starting materials, reacting the amine compound with the halogenated aromatic compound in the presence of a copper catalyst and a base so as to produce the aromatic amino compound having a structure in which an aromatic ring group derived from the halogenated aromatic compound is coupled to the amino group of the amine compound, wherein the amine compound and the halogenated aromatic compound are reacted together under a condition where an aromatic oxycarboxylic acid having a hydroxyl group and a hydroxycarbonyl group that are bonded to neighboring carbon atoms, is made present together with the copper catalyst and the base.
Regioselective ortho-carboxylation of phenols catalyzed by benzoic acid decarboxylases: a biocatalytic equivalent to the Kolbe–Schmitt reaction
作者:Christiane Wuensch、Johannes Gross、Georg Steinkellner、Andrzej Lyskowski、Karl Gruber、Silvia M. Glueck、Kurt Faber
DOI:10.1039/c3ra47719c
日期:——
catalyzed carboxylation of electron-rich phenol derivatives employing recombinant benzoic acid decarboxylases at the expense of bicarbonate as CO2 source is reported. In contrast to the classic Kolbe–Schmittreaction, the biocatalytic equivalent proceeded in a highly regioselective fashion exclusively at the ortho-position of the phenolic directing group in up to 80% conversion. Several enzymes were identified
METHOD FOR MANUFACTURING RESIN PARTICLES AND METHOD FOR MANUFACTURING TONER PARTICLES
申请人:CANON KABUSHIKI KAISHA
公开号:US20150361205A1
公开(公告)日:2015-12-17
A method for manufacturing resin particles, including the step of producing the resin particles by using a liquid which is prepared with a resin having an ionic functional group and a pKa of 6.0 to 9.0, an organic solvent, which can dissolve the resin and which has a solubility parameter of 12.0 or less, water, and a neutralizer, wherein the neutralizer contains an acid having a pKa of 3.0 or less or a base having a pKb of 3.0 or less.
(EN) A compound of the formula Het-NR-SO2-Ph2-A-Ph1 (COOH)(OH) and tautomic form, salts, solvates, C1-6 alkyl esters and pharmaceutical compositions of the compound. Ph1 and Ph2 are benzene rings with the proviso that carboxy and hydroxy are ortho to one another. Het includes an optionally substituted heterocyclic ring which includes conjugated double bonds and binds to nitrogen in NR. The compound is characterized in that A is a bridge which is stable against reduction because it is not azo, and in that R is hydrogen or lower alkyl. The invention also includes the preparation of the compound and its use as a drug, particularly for treating autoimmune diseases.(FR) On décrit un composé de la formule Het-NR-SO2-Ph2-A-Ph1 (COOH)(OH), ses formes tautomères, sels, solvates, (C1-C6)alkyle esters, ainsi que les compositions pharmaceutiques du composé. Ph1 et Ph2 sont des noyaux benzéniques dans lesquels les groupes carboxy et hydroxy doivent être en position ortho l'un par rapport à l'autre. Le groupe Het comprend un groupe hétérocyclique (le cas échéant substitué), comportant des doubles liaisons conjuguées et lié à l'azote du groupe NR. Le composé est caractérisé par le fait que A est un pont résistant à la réduction, parce qu'il ne s'agit pas d'un groupe azo, et par le fait que R est un hydrogène ou un alkyle inférieur. L'invention concerne également la préparation du composé et son utilisation en tant que médicament, en particulier pour le traitement d'affections auto-immunes.
High molecular weight polymers containing pendant salicylic acid groups
申请人:——
公开号:US20030027964A1
公开(公告)日:2003-02-06
High molecular weight polymers comprising salicylic acid groups are useful for clarifying red mud-containing liquors generated in the Bayer process for the recovery of alumina from bauxite.