Arylation of Click Triazoles with Diaryliodonium Salts.
Virant, Miha;Košmrlj, Janez;
The Journal of organic chemistry2019
353
virant2019arylationthe
Abstract
A robust, selective and highly efficient method for the preparation of 1,3,4-triaryl 1,2,3-triazolium salts has been developed. It features arylation of a click triazole with a diaryliodonium salt in the presence of a copper catalyst under neat conditions. The presence of pyridine functionality is tolerated, enabling the first access to key precursors of pyridyl-mesoionic carbene ligands. The method has been integrated into a one-pot protocol with a terminal alkyne, sodium azide, and diaryliodonium salt as staring compounds.