in silico Design, ADME Prediction, Molecular Docking, Synthesis of Novel Triazoles,
Indazoles & Aminopyridines and in vitro Evaluation of Antitubercular Activity
[EN] METHODS FOR PHOSPHINE OXIDE REDUCTION IN CATALYTIC WITTIG REACTIONS<br/>[FR] PROCÉDÉS POUR LA RÉDUCTION D'UN OXYDE DE PHOSPHINE DANS DES RÉACTIONS DE WITTIG CATALYTIQUES
申请人:UNIV DUBLIN CITY
公开号:WO2014140353A1
公开(公告)日:2014-09-18
A method for increasing the rate of phosphine oxide reduction, preferably during a Wittig reaction comprising use of an acid additive is provided. A room temperature catalytic Wittig reaction (CWR) the rate of reduction of the phosphine oxide is increased due to the addition of the acid additive is described. Furthermore, the extension of the CWR to semi-stabilized and non-stabilized ylides has been accomplished by utilization of a masked base and/or ylide-tuning.
Breaking the Ring through a Room Temperature Catalytic Wittig Reaction
作者:Christopher J. O'Brien、Florie Lavigne、Emma E. Coyle、Andrew J. Holohan、Bryan J. Doonan
DOI:10.1002/chem.201300546
日期:2013.5.3
One ring no longer rules them all: Employment of 2.5–10 mol % of 4‐nitrobenzoic acid with phenylsilane led to the development of a room temperature catalytic Wittig reaction (see scheme). Moreover, these enhanced reduction conditions also facilitated the use of acyclic phosphineoxides as catalysts for the first time. A series of alkenes were produced in moderate to high yield and selectivity.
Ruthenium‐Catalyzed Site‐selective Enone Carbonyl Directed
<i>ortho</i>
‐C−H Activation of Aromatics and Heteroaromatics with Alkenes
作者:Manickam Bakthadoss、Polu Vijay Kumar
DOI:10.1002/adsc.201800376
日期:2018.7.16
enone carbonyl directed orthoC−H activation of aromatics and heteroaromatics with alkenes for the construction of functionalized ortho‐olefinated chalcone derivatives in excellent yields in a regio‐ and stereoselective fashion has been developed for the first time. This general protocol involves chelation assisted oxidative coupling in the presence of ruthenium catalyst through C−H bond activation. This
Intermolecular Multiple Dehydrogenative Cross‐Couplings of Ketones with Boronic Acids and Amines via Copper Catalysis
作者:Tianzhang Wang、Guowei Chen、Yu‐Jing Lu、Qian Chen、Yanping Huo、Xianwei Li
DOI:10.1002/adsc.201900419
日期:2019.8.21
versatile oxidative coupling reaction was developed for the synthesis of valuable β‐functionalized unsaturatedketones and meta‐substituted phenols. In the case of intramolecular reactions, achieving rapid molecular complexity through multiple dehydrogenative couplings is already a well‐established strategy. Herein, we report an intermolecular multiple dehydrogenative coupling between ketones and nucleophilic
A new syntheticroute was developed for the synthesis of 4,6-diaryl-2-methyl-l,3-benzoxazoles and their hydrogenated derivatives. The target compounds were obtained via the Neber rearrangement from 3,5-diaryl-2-cyclohexen-l-ones. The formation of the isomers in the dihydro derivatives was explained by the [1,5] sigmatropic shift of hydrogen under thermal condition. DDQ was employed for the dehydrogenation