Rhodium and Iridium Nanoparticles Entrapped in Aluminum Oxyhydroxide Nanofibers: Catalysts for Hydrogenations of Arenes and Ketones at Room Temperature with Hydrogen Balloon
作者:In Soo Park、Min Serk Kwon、Kyung Yeon Kang、Jae Sung Lee、Jaiwook Park
DOI:10.1002/adsc.200600651
日期:2007.8.6
showed high activities in the hydrogenation of various arenes and ketones under mild conditions. Selective hydrogenation was possible for bicyclic and tricyclic arenes in high yields. The catalysts were active at room temperature even with a hydrogenballoon. Also, the catalysts showed high turnover frequency (TOF) values under solventless conditions at 75 °C under 4 atm hydrogen pressure: ca. 1700 h−1 in
可循环利用的金属纳米颗粒催化剂,氢氧化铝中的铑[Rh / AlO(OH)]和氢氧化铝中的铱[Ir / AlO(OH)],是从容易获得的试剂中简单制备的。在温和的条件下,该催化剂在各种芳烃和酮的氢化中显示出高活性。双环和三环芳烃的选择性加氢可能以高收率进行。该催化剂即使在具有氢气球的情况下在室温下也具有活性。此外,催化剂显示无溶剂的条件下高转化频率(TOF)值在75℃下4个大气压的氢气压力:约 1700小时-1在苯的氢化中。此外,Rh / AlO(OH)可以重复使用至少10次而不会失去活性。通过透射电子显微镜(TEM),粉末X射线衍射(XRD),电感耦合等离子体(ICP),能量色散X射线分析(EDX),X射线光电子能谱(XPS),氮吸附来表征催化剂和氢化学吸附实验。铑和铱粒子的大小分别估计为3–4 nm和2–3 nm。这些催化剂的氢氧化铝氧化铝纤维的表面积为500–600 m 2 g -1。
[EN] SYNTHESIS OF TRIAZOLOPYRIMIDINE COMPOUNDS<br/>[FR] SYNTHÈSE DE COMPOSÉS DE TRIAZOLOPYRIMIDINE
申请人:LEK PHARMACEUTICALS
公开号:WO2013060837A1
公开(公告)日:2013-05-02
The present invention relates to the field of organic synthesis and describes the synthesis of specific triazolopyrimidine compounds and intermediates thereof as well as related derivatives.
本发明涉及有机合成领域,描述了特定三唑吡咯啉化合物及其中间体的合成,以及相关衍生物。
Selective catalytic hydrogenation of polycyclic aromatic hydrocarbons promoted by ruthenium nanoparticles
for hydrogenation of polycyclicaromatichydrocarbons (PAHs) containing 2–4 rings undermild reaction conditions. These compounds were partially hydrogenated with good to excellent selectivities just by optimizing the reaction conditions. The influence of the nature of substituents present in different positions of naphthalene on the selectivity of hydrogenation was also studied. Hydrogenation of products
Piperazine compounds of the formula I
in which the variables are defined according to the description, their agriculturally suitable salts, processes and intermediates for preparing the piperazine compounds of the formula I, compositions comprising them and their use as herbicides, i.e. for controlling harmful plants, and also a method for controlling unwanted vegetation which comprises allowing a herbicidally effective amount of at least one piperazine compound of the formula I to act on plants, their seed and/or their habitat.
DIALKYLAMINO ALKYL ESTERS OF PIVAGABINE AS MEDICAMENTS FOR THE TREATMENT OF CENTRAL NERVOUS SYSTEM DISORDERS
申请人:Rafferty Michael
公开号:US20120059008A1
公开(公告)日:2012-03-08
The present embodiments are related to the compound of Formula 1 or Formula 2 below and pharmaceutical formulations thereof as well as treatments for a wide variety of Central Nervous System disorders with the pharmaceutical formulations. Some embodiments include the use of a variety of the instant compounds which surprisingly and advantageously exhibit improved pharmacokinetic and therapeutic profiles in comparison to pivagabine.