在测试的28种非均相和均相催化剂中,Nb 2 O 5对正十二烷酸与反应性较小的胺(苯胺)的直接酰胺化反应显示出最高的收率。由Nb 2 O 5催化的酰胺化适用于具有各种官能团的多种羧酸和胺,并且该催化剂是可重复使用的。催化研究和红外研究吸附在催化剂上的乙酸的结果比较表明,Nb 2 O 5上的路易斯酸位点活化了羧酸的羰基,这是Nb的高活性的原因。2 ø 5催化剂。动力学研究表明,Nb 2 O 5上的路易斯酸位比常规路易斯酸性氧化物(Al 2 O 3,TiO 2)具有更高的耐水性。与最新的酰胺化均相路易斯酸催化剂(ZrCl 4)相比,溶液中碱性添加剂对Nb 2 O 5的负面影响较小,这表明Nb 2 O 5对碱的耐受性更高。路易斯酸催化剂比均相路易斯酸催化剂。
INHIBITORS OF BIOFILM FORMATION OF GRAM-POSITIVE AND GRAM-NEGATIVE BACTERIA
申请人:Ammendola Aldo
公开号:US20090192192A1
公开(公告)日:2009-07-30
The present invention relates to the use of compounds as broad spectrum inhibitors of bacterial biofilm formation. In particular the invention refers to a family of compounds that block the quorum sensing system of Gram-negative and Gram-positive bacteria, a process for their manufacture, pharmaceutical compositions containing them and to their use for the treatment and prevention of bacterial damages and diseases, in particular for diseases where there is an advantage in inhibiting quorum sensing regulated phenotypes of pathogens.
[EN] INHIBITORS OF BIOFILM FORMATION OF GRAM-POSITIVE AND GRAM-NEGATIVE BACTERIA<br/>[FR] INHIBITEURS DE LA FORMATION DE BIOFILMS DE BACTÉRIES GRAM POSITIF ET GRAM NÉGATIF
申请人:QUONOVA LLC
公开号:WO2009077844A2
公开(公告)日:2009-06-25
The present invention relates to the use of compounds as broad spectrum inhibitors of bacterial biofilm formation. In particular the invention refers to a family of compounds that block the quorum sensing system of Gram-negative and Gram-positive bacteria, a process for their manufacture, pharmaceutical compositions containing them and to their use for the treatment and prevention of bacterial damages and diseases, in particular for diseases where there is an advantage in inhibiting quorum sensing regulated phenotypes of pathogens.
Amidation of Carboxylic Acids with Amines by Nb<sub>2</sub>O<sub>5</sub>as a Reusable Lewis Acid Catalyst
作者:Md. A. Ali、S. M. A. H. Siddiki、Wataru Onodera、Kenichi Kon、Ken-ichi Shimizu
DOI:10.1002/cctc.201500672
日期:2015.11
Among 28 types of heterogeneous and homogenous catalysts tested, Nb2O5 shows the highest yield for directamidation of n‐dodecanoic acid with a less reactive amine (aniline). The catalytic amidation by Nb2O5 is applicable to a wide range of carboxylic acids and amines with various functional groups, and the catalyst is reusable. A comparison of the results of the catalytic study and an infrared study
在测试的28种非均相和均相催化剂中,Nb 2 O 5对正十二烷酸与反应性较小的胺(苯胺)的直接酰胺化反应显示出最高的收率。由Nb 2 O 5催化的酰胺化适用于具有各种官能团的多种羧酸和胺,并且该催化剂是可重复使用的。催化研究和红外研究吸附在催化剂上的乙酸的结果比较表明,Nb 2 O 5上的路易斯酸位点活化了羧酸的羰基,这是Nb的高活性的原因。2 ø 5催化剂。动力学研究表明,Nb 2 O 5上的路易斯酸位比常规路易斯酸性氧化物(Al 2 O 3,TiO 2)具有更高的耐水性。与最新的酰胺化均相路易斯酸催化剂(ZrCl 4)相比,溶液中碱性添加剂对Nb 2 O 5的负面影响较小,这表明Nb 2 O 5对碱的耐受性更高。路易斯酸催化剂比均相路易斯酸催化剂。