Interaction of heterocyclic nitrones with organometallic reagents as a method for the synthesis of new types of nitroxides
作者:Vladimir A. Reznikov、Leonid B. Volodarsky
DOI:10.1016/s0040-4020(01)81557-x
日期:1993.1
The reactions of heterocyclic nitroxides: 3-imidazoline-3-oxides, 2H- (4H)-imidazole mono- and dioxides, dihydropyrazine-1,4-dioxides, with organometallic reagents and subsequent oxidation led to heterocyclic nitroxides of 3-(2)-imidazoline and 3-(2)-imidazoline-3-oxide, dihydropyrazine oxide, monocyclic imidazolidine biradicals and stable acyclic nitroxides with hydrogen at the α-carbon atom.
Reaction of 4H- and 2H-imidazole oxides with organolithium compounds, a novel route to stable nitroxyl radicals of the 2(3)-imidazoline series
作者:V. A. Reznikov、L. B. Volodarskii
DOI:10.1007/bf00698955
日期:1993.5
Reactions of 4H and 2H-imidazole oxides with phenyl- and methyilithium followed by oxidation afford stablenitroxylradicals — derivatives of 2- and 3-imidazolines including otherwise inaccessible sterically hindered radicals of the latter group. An unusual reaction, the formation of 2-azabutadiene derivatives after NO elimination in the dark, has been observed for pentaphenyl- and 5-methyltetraph