Direct β-Alkylation of Ketones and Aldehydes via Pd-Catalyzed Redox Cascade
作者:Chengpeng Wang、Guangbin Dong
DOI:10.1021/jacs.8b03530
日期:2018.5.16
report a direct β-alkylation of ketones and aldehydes with simple alkyl bromides through a Pd-catalyzed redox-cascade strategy. The use of a Cu cocatalyst is important for improved efficiency. The reaction is redox-neutral, without the need for strong acids or bases. Both cyclic and acyclic ketones, as well as α-branched aldehydes, are suitable substrates for coupling with secondary and tertiary alkyl
Lewis Acid Mediated Cyclizations: Diastereoselective Synthesis of Six- to Eight-Membered Substituted Cyclic Ethers
作者:Arun Ghosh、Anthony Tomaine、Kelsey Cantwell
DOI:10.1055/s-0036-1589054
日期:2017.9
Lewis acid catalyzed synthesis of medium-sized cyclicethers in a diastereoselective manner. Cyclicethers are widely abundant in natural products. Cyclicether templates are also utilized in drug design and medicinal chemistry. Although the synthetic processes for this class of compounds have been studied extensively with respect to five- and six-membered rings, medium-sized cyclicethers are synthetically