124939-60-2Relevant articles and documents
NMR studies on [2+3] cycloaddition of nitrile oxides to cyclohexene derivatives
Gucma, Miros?aw,Go??biewski, W. Marek,Michalczyk, Alicja K.
, p. 223 - 232 (2014/02/14)
Site selectivity, regioselectivity and stereoselectivity of [2+3] cycloaddition of 4-trifluoromethylbenzonitrile oxide to cyclohexene carboxylates substituted with alkenyl functions were examined. Site selectivity was correlated with electron charges of alkenyl carbon atoms. Structure of the products has been established by an extensive application of 2D 1H and 13C NMR spectroscopy and electrospray ionization mass spectrometry.
Isomerisation de dienes-1,5 fonctionnalises par le fer pentacarbonyle
Rodriguez, J.,Brun, P.,Waegell, B.
, p. 343 - 370 (2007/10/02)
A series of various, functionnalized 4-vinylcyclohexene derivatives, substituted with electron-withdrawing or -donating groups on the exocyclic double bond, have been isomerized by pentacarbonyliron, under thermodynamic control with heating, into a mixture of conjugated cyclohexadiene tricarbonyliron complexes, of which the 2-substituted derivative is the predominant.When ferrous chloride is used as the co-catalyst, the isomerisation proceeds under kinetic control to give the 1-substituted cyclohexadienetricarbonyliron complex as the major derivative.Reaction mechanisms, have been proposed for these isomerisation processes, which provide a new selective route to such derivatives.The formation of η4-1,4-cyclohexadienetricarbonyl complexes as intermediates has been excluded, and it is shown that the thermal isomerisation proceeds via η2-complexes that are formed by successive 1,3-hydrogen shifts.
