Directα-alkylation of carbonylcompounds represents a fundamental bond forming transformation in organic synthesis. We report the first ketone-alkylation using olefins and alcohols as simple alkylating agents catalyzed by graphene oxide. Extensive studies of the graphene surface suggest a pathway involving dual activation of both coupling partners. Notably, we show that polar functional groups have
Arylboronic Acid Catalyzed <i>C</i>-Alkylation and Allylation Reactions Using Benzylic Alcohols
作者:Susana Estopiñá-Durán、Euan B. Mclean、Liam J. Donnelly、Bryony M. Hockin、James E. Taylor
DOI:10.1021/acs.orglett.0c02736
日期:2020.10.2
The arylboronic acid catalyzed dehydrative C-alkylation of 1,3-diketones and 1,3-ketoesters using secondary benzylic alcohols as the electrophile is reported, forming new C-C bonds (19 examples, up to 98% yield) with the release of water as the only byproduct. The process is also applicable to the allylation of benzylic alcohols using allyltrimethylsilane as the nucleophile (12 examples, up to 96% yield).