作者:Fatimat O. Badmus、Joshua A. Malone、Frank R. Fronczek、Rendy Kartika
DOI:10.1039/d0cc01796e
日期:——
An expedient synthesis of highly substituted tetrahydrobenzofuran via an unsymmetrical silyloxyallyl cation is reported. Conveniently generated under catalytic Brønsted acid conditions, nucleophilic capture of this reactive intermediate by silylenolate, followed by Paal-Knorr cascade cyclization in the presence of tosic acid monohydrate effectively constructed the tetrahydrobenzofuran core in a single
Copper-Catalyzed Alkylation of Silyl Enol Ethers with Sterically Hindered α-Bromocarbonyls: Access to the Histamine H<sub>3</sub> Receptor Antagonist
作者:Dengke Li
DOI:10.1021/acs.joc.0c02277
日期:2021.1.1
A general and efficient copper-catalyzed alkylation of silyl enolethers with functionalized alkyl bromides has been developed for the synthesis of the sterically hindered γ-ketoesters. The transformation was induced through C(sp3)-halogen activation of commercially available sterically hindered alkyl bromides under mild conditions in good results. The strategy could be used for the synthesis of biologically