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Mise en evidence par rmn 13C et Ir d'enolates mixtes formes par reaction d'echange entre enolates lithiens et sels de metaux divalents
Authors:J Bertrand  L Gorrichon  P Maroni  R Meyer  Lilia Viteva
Institution:Equipe de Recherche Associée au C.N.R.S. n° 686, synthése et Physicochimie Organique, Université Paul Sabatier, 118, route de Narbonne - 31062 Toulouse cedex France
Abstract:Mixed enolates (RO)2LiMgBr 4 and (RO)2LiZnBr 5 are obtained by addition of MgBr2 or ZnBr2 to the lithium enolate of 2,2-diMe pentanone-3
. The mixed magnesium enolate 4 is further transformed to ROMgBr with an additional equivalent of MgBr2 while 5 is unchanged by additional ZnBr2. The same mixed species are observed in the direct addition of preformed enolates.
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