N-Arylation of DABCO with Diaryliodonium Salts: General Synthesis of <i>N</i>-Aryl-DABCO Salts as Precursors for 1,4-Disubstituted Piperazines
作者:Dmitry I. Bugaenko、Marina A. Yurovskaya、Alexander V. Karchava
DOI:10.1021/acs.orglett.8b02676
日期:2018.10.19
Employing DABCO as a substrate, aryl(mesityl)iodonium triflates are introduced as arylating agents for a tertiary sp3-nitrogen. Mild conditions and exceptional selectivity of the aryl group transfer allow unprecedented N-aryl-DABCO salts to be obtained, bearing substituents of different electronic natures. This metal-free methodology has no analogy among known transition-metal-based reactions. The