Meta‐Selective C−H Arylation of Aromatic Alcohols with a Readily Attachable and Cleavable Molecular Scaffold
作者:Qiankun Li、Eric M. Ferreira
DOI:10.1002/chem.201703054
日期:2017.8.25
The first example of meta‐selective C−H arylations of arene alcohol‐based substrates is described. The strategy involves the combination of the transient norbornene strategy with the quinoline‐based acetal scaffold to achieve the formation of biaryl compounds. Both a two‐step meta‐arylation/scaffold cleavage process and a total telescoping procedure are described, highlighting the convenient attributes
申请人:The University of Georgia Research Foundation, Inc
公开号:US20180065909A1
公开(公告)日:2018-03-08
Provided are methods for the meta-selective C—H arylations of arene alcohol-based substrates. The methods combine the transient norbornene strategy with a quinoline-based acetal scaffold to achieve the formation of biaryl compounds. These processes establish a foundation for catalytic polyfunctionalization of alcohol-based compounds. The method comprises attaching a heterocyclic hemiacetal scaffold to an aromatic alcohol or a substituted aromatic alcohol; reacting the aromatic or substituted aromatic alcohol having the heterocyclic hemiacetal scaffold attached with an alkyl or aryl iodide in a reaction mix comprising a palladium catalyst, a silver salt, and carboxymethyl norbornene to generate a meta-arylated arene conjugated to the heterocyclic hemiacetal scaffold; and then cleaving the heterocyclic hemiacetal scaffold from the meta-arylated arene alcohol.