Synthesis of adamantane derivatives. 52. 1,3-Dipolar cycloaddition reactions of 1-azidoadamantane. Reactivity, regioselectivity, and carbon-13 nuclear magnetic resonance spectra of 1-(1-adamantyl)-.DELTA.2-1,2,3-triazolines and -1H-1,2,3-triazoles
Light‐Triggered Nickel‐Catalyzed Azide−Alkyne Cycloaddition for the Preparation of 1,5‐Disubstituted 1,2,3‐Triazoles
作者:Baptiste Abadie、Axel Almansa、Ouchan He、Stéphane Massip、Florian Molton、Carole Duboc、Jean‐Marc Vincent
DOI:10.1002/adsc.202201026
日期:2022.12.20
When irradiated by UVA, a Ni(II) precatalyst integrating a benzophenone chromophore in its structure catalyzes the regioselective cycloaddition of alkynes and azides to produce 1,5-disubsituted 1,2,3-triazoles with 1,5:1,4 regioisomer ratios ranging from 1.7:1 to >20:1. Speciation and reactivity studies revealed that the reaction most likely proceeds through a Ni(I)/Ni(III) catalytic cycle.