[EN] REAGENTS AND PROCESS FOR DIRECT C-H FUNCTIONALIZATION<br/>[FR] RÉACTIFS ET PROCÉDÉ POUR LA FONCTIONNALISATION DIRECTE DE LA LIAISON C-H
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2020094673A1
公开(公告)日:2020-05-14
Thianthrene derivative of the Formula (I): wherein R1 to R8 may be the same or different and are selected from hydrogen, Cl, F, a partially or fully fluorinated C1 to C6 alkyl group, and wherein n is 0 or 1, with the proviso that at least one of R1 to R8 is not hydrogen and process for C-H functionalization of aromatic compounds using this compound.
Site-selective and versatile aromatic C−H functionalization by thianthrenation
作者:Florian Berger、Matthew B. Plutschack、Julian Riegger、Wanwan Yu、Samira Speicher、Matthew Ho、Nils Frank、Tobias Ritter
DOI:10.1038/s41586-019-0982-0
日期:2019.3
variety of well-defined arene derivatives. Here we report a highly selective aromatic C–H functionalization reaction that does not require a particular directing group or substitution pattern to achieve selectivity, and provides functionalized arenes that can participate in various transformations. We introduce a persistent sulfur-based radical to functionalize complex arenes with high selectivity and obtain
Site-selective functionalization of C-H bonds in small complex molecules is a long-standing challenge in organic chemistry. Herein, we report a broadly applicable and site-selective aromatic C-H dibenzothiophenylation reaction. The conceptual advantage of this transformation is further demonstrated through the two-step C-H [18 F]fluorination of a series of marketed small-molecule drugs.
efficient palladium-catalyzed synthesis of esters from readily available arenes has been developed. These C–H bond esterifications were achieved relying on the regioselective thianthrenation to generate the aryl-TT salts, which were treated as reactive electrophilic substrates to couple with phenol formate and N-hydroxysuccinimide (NHS) formate giving access to phenol esters and NHS esters, respectively