42220-67-7Relevant academic research and scientific papers
Etude du transfert monoelectronique entre des germylanions et des piegeurs de spin dia et paramagnetiques
Riviere, P.,Castel, A.,Desor, D.,Abdennadher, C.
, p. 51 - 60 (2007/10/02)
Reactions between organogermyllithium R3GeLi and several substrates favoring SET reactions (3,5-di-t-butyl-orthoquinone, fluorenone, tetracyanoquinodimethane, 2,4,6-tri-t-butylnitrosobenzene, etc.) lead mainly to the formation of digermanes and O- or N-germyl adducts.All these reactions seem to proceed principally by single-electron transfer.An ESR study of the reaction shows transient organic radical anion formation and germanium-centred radicals R3Ge.The prepondancy of this mechanism can be demonstrated by the reaction between R3GeLi and a paramagnetic quinonic species, the galvinoxyl radical: the latter is almost completely transformed into a diamagnetic anion.Digermanes mainly produced in these reactions are formed via radicalar duplication as well as lithiogermolysis of reaction adducts.
Ring-Opening Reactions of Anionic Cyclopropyl Compounds. 3
Brand, Richard A.,Mulvaney, J. E.
, p. 633 - 636 (2007/10/02)
The reaction of KO-t-Bu in Me2SO with the tricyclocyclopropyl carbonyl compounds 3a,b was shown to result in the formation of cyclopentadienes and cinnamic acid derivatives 4a,b and 5a,b which were shown to be preceded by intermediates 6a,b.It is suggested that 6a,b rearrange to 4a,b and 5a,b via an unusual electrocyclization followed by a fragmentation.An example of an apparent conrotatory ring opening of a cyclopropyl carbanion or anion radical is presented in the conversion of 8 to 9.
