A tunable route to oxidative and eliminative [3+2] cycloadditions of organic azides with nitroolefins: CuO nanoparticles catalyzed synthesis of 1,2,3-triazoles under solvent-free condition
摘要:
A regioselective and tunable synthesis of 1,5-disubstituted 1,2,3-triazloles from oxidative and eliminative [3+2] cycloadditions of nitroolefins and organic azides under solvent-free condition in the presence and absence of commercially available CuO nanoparticle catalyst is described. In the presence of the catalyst under solvent-free condition, nitro group is retained in the product while it gets eliminated in the absence of the catalyst. (C) 2016 Elsevier Ltd. All rights reserved.
Multi-component reaction for the preparation of 1,5-disubstituted 1,2,3-triazoles by in-situ generation of azides and nickel-catalyzed azide-alkyne cycloaddition
An efficient one-pot procedure combining bromide conversion into azide followed by NiAAC for the preparation of 1,5-disubstituted 1,2,3-triazoles has been developed. This procedure prevents the use of isolated azides, which are insufficiently commercially available and could be potentially unstable and difficult to handle. Moreover, this one-pot method tolerates a broad range of functional moieties