Transition Metal-Free TEMPO-Catalyzed Oxidative Cross- Coupling of Nitrones with Alkynyl-Grignard Reagents
作者:Sandip Murarka、Armido Studer
DOI:10.1002/adsc.201100327
日期:2011.10
cross-coupling of nitrones and alkynyl-magnesium compounds using a catalytic amount of 2,2,6,6-tetramethylpiperidine-N-oxyl radical (TEMPO) as an environmentally benign organic oxidant and dioxygen as terminal oxidant is described. These coupling reactions can be performed without adding any transition metal on various N-tert-butylnitrones and alkynyl-Grignardreagents. Moreover, the alkynylated nitrone products