Solvent and Base in One: Tetra-<i>n</i>
-butylammonium Acetate as a Multi-Purpose Ionic Liquid Medium for Ru-Catalyzed Directed Mono- and Di-<i>o</i>
-C-H Arylation Reactions
作者:Ya-Ling Zou、Zhen-Yu Wang、Yin-Mao Feng、You-Gui Li、Eric Assen B. Kantchev
DOI:10.1002/ejoc.201701022
日期:2017.11.16
Bu4NOAc can be a multi-purpose medium for a Ru-catalyzed directed o-C–H arylation reaction with functionalized aryl bromides. Acetate plays the role of base and Bu4N salts (excess acetate and side product bromide) behave as ionicliquids. The medium is compatible with both RuCl3·xH2O (major product: di-arylation) and [RuCl2(p-cymene)]2/(p-Tol)3P catalytic systems (major product: mono-arylation).
Bu 4 NOAc可以是多官能团介质,用于Ru催化的与官能化芳基溴化物进行的定向o -C–H芳基化反应。乙酸盐起碱的作用,Bu 4 N盐(过量的乙酸盐和副产物溴化物)起离子液体的作用。该介质与RuCl 3 · x H 2 O(主要产物:二芳基化)和[RuCl 2(p- cymene)] 2 /(p -Tol)3 P催化系统兼容(主要产物:单芳基化) 。
Ruthenium Complexes of κ(P)- and κ(P)-η<sup>6</sup>-Coordinated KITPHOS Monophosphines: Efficient Catalysts for the Direct Ortho Arylation of 2-Phenylpyridine and <i>N</i>-Phenylpyrazole with Aryl Chlorides
作者:Simon Doherty、Julian G. Knight、Carrie R. Addyman、Catherine H. Smyth、Nicholas A. B. Ward、Ross W. Harrington
DOI:10.1021/om200843f
日期:2011.11.14
P-coordinated KITPHOSmonophosphinecomplex [(p-cymene)RuCl2(KITPHOS)] in chlorobenzene at 120 °C resulted in displacement of the p-cymene to afford [κ(P)-η6-KITPHOS}RuCl2], the first example of a constrained-geometry complex in which the κ(P)-bonded diphenylphosphino group and the η6-coordinated proximal phenyl ring are connected by an unsaturated two-carbon tether; both complexes form efficient catalysts
Phenol Derivatives in Ruthenium-Catalyzed C-H Arylation: A General Synthetic Access to Azole-Based Congested Polyaromatics
作者:Julien Roger、Jean-Cyrille Hierso
DOI:10.1002/ejoc.201800312
日期:2018.9.23
Aryl triflates are suitable electrophile coupling partners for the ruthenium‐catalyzed direct diarylation of heteroaromatic substrates using azole N‐directed sp2 C–H activation including diethyl carbonate as an eco‐friendly solvent.
Arene Ruthenium Catalyst MCAT-53 for the Synthesis of Heterobiaryl Compounds in Water through Aromatic C–H Bond Activation
作者:Anita Mehta、Biswajit Saha、Ali Aiden Koohang、Mukund S. Chorghade
DOI:10.1021/acs.oprd.8b00141
日期:2018.9.21
developed as a catalyst to effect aromatic C–H bondactivation and C–C coupling reactions in water. Cross-coupling reactions were performed in DI/distilled water under air- and ligand-free conditions without further activation of the catalyst. Synthesis of an advanced intermediate of CETP inhibitor, Anacetrapib, in water has been demonstrated to give a single regioisomer using the MCAT-53 catalyst.
Efficient Catalytic System for Ru-Catalyzed C–H Arylation and Application to a Practical Synthesis of a Pharmaceutical
作者:Masahiko Seki
DOI:10.1021/cs501328x
日期:2014.11.7
cocatalyst for Ru-catalyzed C–H arylation. Among them, K 2, 4, 6-trimethylbenzenesulfonate (TMBSK) was found to be most active, and generality of the reaction was confirmed for a variety of nitrogen-containing heterocycles to give corresponding functionalizedbiaryls in high yields. The present methodology was applied to a practicalsynthesis of Candesartan Cilexetil.