[EN] PROCESS FOR FORMING A CARBON-CARBON BOND<br/>[FR] PROCÉDÉ DE FORMATION D'UNE LIAISON CARBONE-CARBONE
申请人:UNIV MANCHESTER
公开号:WO2019215426A1
公开(公告)日:2019-11-14
A process for forming a carbon-carbon bond to couple an aryl or heteroaryl group of a first compound with an aryl or heteroaryl group of a second compound, the process comprising reacting the first compound with the second compound in the presence of a catalytically effective amount of a neutral or cationic ruthenium(II) catalyst of formula (I):
Photocatalytic Oxidative Bromination of Electron-Rich Arenes and Heteroarenes by Anthraquinone
作者:Daniel Petzold、Burkhard König
DOI:10.1002/adsc.201701276
日期:2018.2.15
The estimated excited oxidation potential of sodium anthraquinone‐2‐sulfonate (SAS) increases from 1.8 V to about 2.3 V vs SCE by protonation with Brønsted acids. This increased photooxidation power of protonated anthraquinone was used for the regio‐selective oxidativebromination of electron rich (hetero)arenes and drugs in good yield. The mild reaction conditions are compatible with many functional
Cyclometallated ruthenium catalyst enables late-stage directed arylation of pharmaceuticals
作者:Marco Simonetti、Diego M. Cannas、Xavier Just-Baringo、Iñigo J. Vitorica-Yrezabal、Igor Larrosa
DOI:10.1038/s41557-018-0062-3
日期:2018.7
Biaryls are ubiquitous core structures in drugs, agrochemicals and organic materials that have profoundly improved many aspects of our society. Although traditional cross-couplings have made practical the synthesis of many biaryls, CâH arylation represents a more attractive and cost-effective strategy for building these structural motifs. Furthermore, the ability to install biaryl units in complex molecules via late-stage CâH arylation would allow access to valuable structural diversity, novel chemical space and intellectual property in only one step. However, known CâH arylation protocols are not suitable for substrates decorated with polar and delicate functionalities, which are commonly found in molecules that possess biological activity. Here we introduce a class of ruthenium catalysts that display a unique efficacy towards late-stage arylation of heavily functionalized substrates. The design and development of this class of catalysts was enabled by a mechanistic breakthrough on the Ru(ii)-catalysed CâH arylation of Nâchelating substrates with aryl (pseudo)halides, which has remained poorly understood for nearly two decades. Nearly two decades after its discovery, the Ru(II)-catalysed CâH arylation of N-chelating aromatics with aryl halides was reinvestigated and a new key reaction intermediate was uncovered. A thorough mechanistic elucidation has now led to the development of a new class of catalysts with unique efficacy towards late-stage arylation of âreal-worldâ compounds.