KPF<sub>6</sub>-Mediated Esterification and Amidation of Carboxylic Acids
作者:Sonam、Vikki N. Shinde、Anil Kumar
DOI:10.1021/acs.joc.1c02611
日期:2022.3.4
been developed for the synthesis of esters and amides. A wide range of carboxylicacids and alcohols or amines worked well under the developed reaction conditions, thus providing good to excellent (61–98%) yields of the corresponding esters and amides. The method worked well with bioactive substrates such as cholesterol, levulinic acid, and linoleic acid. Wide substrate scope, operational simplicity
An efficient three-component synthesis of coumarin-3-carbamides by use of Ni–NiO nanoparticles as magnetically separable catalyst
作者:Nayim Sepay、Chayan Guha、Arpan Kool、Asok K. Mallik
DOI:10.1039/c5ra13932e
日期:——
An efficient and ecofriendly synthesis of coumarin-3-carbamides has been developed by a three-component reaction of 2-hydroxybenzaldehydes, aliphatic amines (p-/s-) and diethyl malonate using Ni–NiO nanoparticles as catalyst.
[EN] METHODS AND COMPOSITIONS FOR DIAGNOSTIC AND THERAPEUTIC TARGETING OF COX-2<br/>[FR] MÉTHODES ET COMPOSITIONS DE DIAGNOSTIC ET DE CIBLAGE THÉRAPEUTIQUE DE COX-2
申请人:UNIV VANDERBILT
公开号:WO2007149456A2
公开(公告)日:2007-12-27
[EN] The presently disclosed subject matter provides compositions that selectively bind cyclooxygenase-2 and comprise a therapeutic and/or diagnostic moiety. Also provided are methods for using the disclosed compositions for diagnosing (i.e., by imaging) a target cell and/or treating a disorder associated with a cyclooxygenase-2 biological activity. [FR] La présente invention a pour objet des compositions qui se lient de façon sélective à la cyclooxygénase-2 et qui comprennent une fonction thérapeutique et/ou diagnostique. La présente invention concerne également des méthodes d'emploi des compositions décrites dans le diagnostic (c'est-à-dire par imagerie) d'une cellule cible et/ou de traitement d'un trouble associé avec l'activité biologique d'une cyclooxygénase-2.
Surface modification of silica nanoparticles: a new strategy for the realization of self-organized fluorescence chemosensors
The self-organization of the proper subunits of a fluorescence chemosensor on the surface of silica nanoparticles allows the easy design and realization of new effective sensing systems. Commercially available silica particles (20 nm diameter) were functionalized with triethoxysilane derivatives of selective Cu(II) ligands and fluorescent dyes. Grafting of the sensor components to the particle surface ensures the spatial proximity between the sensor components and, as a consequence, binding of Cu(II) ions by the ligand subunits leads to quenching of the fluorescent units emission. In 9 : 1 DMSO–water solution, the coated silica nanoparticles (CSNs) selectively detect copper ions down to nanomolar concentrations. The operative range of the sensors can be tuned either by switching the ligand units or by modification of the components ratio. Sensors with the desired photophysical properties can be easily prepared by using different fluorescent dyes. Moreover, the organization of the network of sensor components gives rise to cooperative and collective effects: on one hand, the ligand subunits bound to the particle surfaces cooperate to form multivalent binding sites with an increased affinity for the Cu(II) ions; on the other hand, binding of a single metal ion leads to the quenching of several fluorescent groups producing a remarkable signal amplification.