Heterogeneous Catalytic Reactions “On Water” by Using Stable Polymeric Alkynylcopper(I) Pre-Catalysts: Alkyne/Azide Cycloaddition Reactions
作者:Benjamin R. Buckley、Sandra E. Dann、Harry Heaney、Emma C. Stubbs
DOI:10.1002/ejoc.201001326
日期:2011.2
Dinuclear alkynylcopper(I) complexes have been found to be the active pre-catalysts in copper-catalysed cycloaddition of azides and terminal alkynes (CuAAC). These copper(I) ladderane polymers are used in “on water” CuAAC reactions, with loadings as low as 1 mol-%.
A New Simplified Protocol for Copper(I) Alkyne–Azide Cycloaddition Reactions Using Low Substoichiometric Amounts of Copper(II) Precatalysts in Methanol
Copper(II) carboxylates are reduced efficiently by methanol in the presence of alkynes and form yellow alkynylcopper(I) polymeric precatalysts that are involved with azides, in the absence of added ligands, in the catalytic cycles that result in the formation of 1,4-disubstituted 1,2,3-triazoles.