Synthesis of novel cyclodextrin derivatives by aromatic spacer insertion and their inclusion ability
摘要:
Novel cyclic host molecules were synthesized by the insertion of three types of aromatic spacers into the skeleton of permethylated alpha-cyclodextrin. These host molecules formed a 1:1 complex with sodium 3- and 4-nitrobenzenesulfonates (3- and 4-NBS), and sodium 2,4-dinitrobenzenesulfonate (DNBS) in D2O/CD3OD (4:1) solution. The type of spacer inserted remarkably affected the inclusion ability of the hosts toward DNBS. The p-xylylene-inserted CDs showed greater inclusion ability toward DNBS than permethylated alpha- and beta-CDs. (c) 2005 Elsevier Ltd. All rights reserved.
[EN] MANGANESE BASED COMPLEXES AND USES THEREOF FOR HOMOGENEOUS CATALYSIS<br/>[FR] COMPLEXES À BASE DE MANGANÈSE ET LEURS UTILISATIONS SERVANT À UNE CATALYSE HOMOGÈNE
申请人:YEDA RES & DEV
公开号:WO2017137984A1
公开(公告)日:2017-08-17
The present invention relates to novel manganese complexes and their use, inter alia, for homogeneous catalysis in (1) the preparation of imine by dehydrogenative coupling of an alcohol and amine; (2) C-C coupling in Michael addition reaction using nitriles as Michael donors; (3) dehydrogenative coupling of alcohols to give esters and hydrogen gas (4) hydrogenation of esters to form alcohols (including hydrogenation of cyclic esters (lactones) or cyclic di-esters (di- lactones), or polyesters); (5) hydrogenation of amides (including cyclic dipeptides, lactams, diamide, polypeptides and polyamides) to alcohols and amines (or diamine); (6) hydrogenation of organic carbonates (including polycarbonates) to alcohols or hydrogenation of carbamates (including polycarbamates) or urea derivatives to alcohols and amines; (7) dehydrogenation of secondary alcohols to ketones; (8) amidation of esters (i.e., synthesis of amides from esters and amines); (9) acylation of alcohols using esters; (10) coupling of alcohols with water and a base to form carboxylic acids; and (11) preparation of amino acids or their salts by coupling of amino alcohols with water and a base. (12) preparation of amides (including formamides, cyclic dipeptides, diamide, lactams, polypeptides and polyamides) by dehydrogenative coupling of alcohols and amines; (13) preparation of imides from diols.
Ag<sup>+</sup>selection by aza-18-crown-6 ethers<i>N</i>-Substituted on heterocyclic aromatics
作者:Kiyoshi Matsumoto、Hirokazu Iida、Yukio Ikemi、Akira Shigeta、Mitsuo Toda、Naoto Hayashi、Robert A Bulman
DOI:10.1002/jhet.5570420203
日期:2005.3
necessary by high-pressure SNAr reactions, of aza-18-crown-6 ethers linked to heterocyclicaromatics has extended the number of potential host compounds for Ag+. The complexation of Ag+ by the new compounds has been evaluated by liquid membrane ion transport and ion extraction experiments. The nature of the binding sites of these new host compounds for Ag+ has been assessed, in DMF/D2O (4/1), by 13C
与杂环芳族化合物连接的aza-18-crown-6醚在必要时通过高压S N Ar反应在氮原子上取代,从而扩展了潜在的Ag +主体化合物的数量。通过液膜离子迁移和离子萃取实验评估了新化合物对Ag +的络合作用。这些新的主体化合物与Ag +的结合位点的性质已在DMF / D 2 O(4/1)中通过用AgClO 4的13 C nmr滴定实验进行了评估。
Verbindungen als Geruchsverhinderer
申请人:THOR GmbH
公开号:EP2216372A1
公开(公告)日:2010-08-11
Die Erfindung betrifft Verbindungen aus den Gruppen der (A) Elektrophilen, (B) Nukleophilen, (C) Alkylierungsmitteln, (D) Antioxidantien und (E) Oxidationsmitteln als Geruchsverhinderer zur Verminderung von so genanntem Ghost Odor der durch 2-Methyl-4-isothiazolin-3-on und/oder Octyl-4-isothiazolin-3-on hervorgerufen wird. Die Erfindung betrifft ferner Biozidzusammensetzungen die 2-Methyl-4-isothiazolin-3-on und/oder Octyl-4-isothiazolin-3-on, sowie einen oder mehrere Geruchsverhinderer enthalten, und die Verwendung von Geruchsverhinderern zur Verhinderung von Ghost Odor.
A Direct Synthesis of <i>P</i>-Chiral Phosphine−Boranes via Dynamic Resolution of Lithiated Racemic <i>tert</i>-Butylphenylphosphine−Borane with (−)-Sparteine
作者:Bradley Wolfe、Tom Livinghouse
DOI:10.1021/ja973685k
日期:1998.5.1
Compounds for preventing ghost odour
申请人:Baum Rudiger
公开号:US20100186631A1
公开(公告)日:2010-07-29
The invention relates to compounds from the groups of (A) electrophiles, (B) nucleophiles, (C) alkylating agents, (D) antioxidants and (E) oxidizing agents as odour preventatives for reducing so-called ghost odour which is induced by 2-methyl-4-isothiazolin-3-one and/or octyl-4-isothiazolin-3-one. The invention further relates to biocide compositions which comprise 2-methyl-4-isothiazolin-3-one and/or octyl-4-isothiazolin-3-one and also one or more odour prevenatives, and to the use of odour preventatives for preventing ghost odour.