Nucleophilic Addition to Iminium Ethers in the Preparation of Functionalized <i>N</i>-Alkyl Heterocycles
作者:Erik Fenster、Brenton T. Smith、Vijaya Gracias、Gregory L. Milligan、Jeffrey Aubé
DOI:10.1021/jo702193g
日期:2008.1.1
synthesized by the reactions of ketones with hydroxyalkyl azides. These cationic species react with a variety of nucleophiles via two possible pathways. The initially formed, kinetic product arises from direct addition to the iminium carbon in the substrate. In some cases, the initial adduct reverts to the starting iminium ether and the ultimate product arises from nucleophilic displacement at the
Synthesis of Functionalized <i>N</i>-Alkyl Heterocycles from Ketones by a Sequential Ring Expansion/Nucleophilic Addition Process
作者:Vijaya Gracias、Gregory L. Milligan、Jeffrey Aubé
DOI:10.1021/jo951953w
日期:1996.1.1
Aerial dioxygen activation <i>vs.</i> thiol–ene click reaction within a system
作者:Khokan Choudhuri、Arkalekha Mandal、Prasenjit Mal
DOI:10.1039/c8cc01359d
日期:——
Markovnikov or anti-Markovnikov selective thiol–ene click (TEC) reactions and the synthesis of β-hydroxysulfides via aerial dioxygen activation are prevalent C–S bond forming reactions of styrenes and thiophenols. Herein, by choosing appropriate environments using solvents with additives or neat conditions, any one of these three reactions was achieved exclusively in excellent yields.