Heterogeneous Ni Catalysts for N-Alkylation of Amines with Alcohols
作者:Ken-ichi Shimizu、Naomichi Imaiida、Kenichi Kon、S. M. A. Hakim Siddiki、Atsushi Satsuma
DOI:10.1021/cs4001267
日期:2013.5.3
Ni/θ-Al2O3, which suggests the cooperation of the acid–basesite of θ-Al2O3. For a series of Ni/θ-Al2O3 catalysts with different particle size, the turnover frequency (TOF) per surface Ni increases with decreasing Ni mean particle size, indicating that low-coordinated Ni species and/or metal–support interface are active sites. From these results, we propose that the active site for this reaction is metal–support
已经制备了负载在各种载体上的镍纳米颗粒(Ni / MO x),并研究了胺与醇的N-烷基化反应。在这些催化剂中,镍/θ-Al系2 Ó 3通过原位H制备2的NiO -还原/θ-Al系2 ö 3烷烃具有最高的活性,在无添加剂条件下,它是苯胺和脂族胺与各种醇(苄基和脂族醇)的烷基化反应的可重复使用的多相催化剂。伯胺被转化为仲胺,仲胺被转化为叔胺。对于苯胺与脂肪醇的反应,该催化剂比基于贵金属的最新催化剂显示出更高的周转数(TON)。机理研究表明,反应是通过氢借入机理进行的。Ni催化剂的活性取决于载体材料的性质。酸碱双功能载体比碱性或酸性载体具有更高的活性,这表明载体上的酸碱位点是必需的。2 Ó 3,这表明θ-Al的酸-碱位点的合作2 Ó 3。对于一系列的Ni /的θ-Al系2 ö 3种催化剂具有不同的颗粒大小,转换频率(TOF)每面的Ni增加随镍平均粒径,这表明低配位的Ni物种和/或金属-支撑界面是
[EN] POLYNUCLEOTIDES ENCODING JAGGED1 FOR THE TREATMENT OF ALAGILLE SYNDROME<br/>[FR] POLYNUCLÉOTIDES CODANT POUR JAGGED1 POUR LE TRAITEMENT DU SYNDROME D'ALAGILLE
申请人:MODERNATX INC
公开号:WO2017201342A1
公开(公告)日:2017-11-23
The invention relates to mRNA therapy for the treatment of Alagille syndrome (ALGS), mRNAs for use in the invention, when administered in vivo, encode JAGGED 1 (JAG1), isoforms thereof, functional fragments thereof, and fusion proteins comprising JAG1, mRNAs of the invention are preferably encapsulated in lipid nanoparticles (LNPs) to effect efficient delivery to cells and/or tissues in subjects, when administered thereto. mRNA therapies of the invention increase and/or restore deficient levels of JAG1 expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of toxic metabolites associated with deficient JAG1 activity in subjects.
Alkoxylated quaternary ammonium salts and fuels containing them
申请人:Afton Chemical Corporation
公开号:EP2862916A1
公开(公告)日:2015-04-22
A fuel additive and its preparation for a engine, a fuel containing the additive, a fuel additive concentrate, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for an engine. The fuel additive includes a quaternary ammonium salt derived from a reaction of a hydrocarbyl substituted anhydride, a tertiary amine and a hydroxyl-containing epoxide, wherein the tertiary amine is devoid of primary and secondary amino groups.
RAPID CURING THIOL EPOXY RESIN WITH IMPROVED COMPRESSION STRENGTH PERFORMANCE
申请人:The Boeing Company
公开号:EP3165561A1
公开(公告)日:2017-05-10
Aspects described herein generally describe epoxy resins and methods of epoxy resin formation. In some embodiments, a resin includes the reaction product of one or more polythiols, one or more polyepoxides, one or more fillers and one or more amine catalysts. Polythiols have between two and about ten thiol moieties. Polyepoxides have between two and about ten epoxy moieties. One or more amine catalysts of the formula NR1R2R3, wherein each of R1, R2, and R3 is independently linear or branched C1-20 alkyl or two or more of R1, R2, and R3 combine to form cycloalkyl. The resin has a compressive strength of at least 14 ksi at 2% offset at 70°F and at least 8 ksi at 2% offset at 190°F.
Polyester polyol-containing polyurethane systems having improved hydrolytic stability
申请人:EVONIK DEGUSSA GMBH
公开号:US10023680B2
公开(公告)日:2018-07-17
An isocyanate reactive composition for making a polyurethane foam includes a tertiary amine urethane catalyst comprising a di(C1-C4)alkyl fatty alkyl amine and a polyester polyol. The use of one or more of fatty alkyl tertiary amine serves to reduce hydrolysis of the polyester polyol in the isocyanate reactive composition.