Synthèse de cétones α, α′-fonctionnalisées puis d'aldéhydes α-énols par ouverture des α-cyano α-hydroxyméthyl époxydes.
作者:K. Layachi、I. Ariès-Gautron、M. Guerro、A. Robert
DOI:10.1016/s0040-4020(01)88717-2
日期:1992.2
Two synthetic routes to alpha-enol aldehydes are described. Monosubstituted alpha-enol aldehydes are obtained via Li2NiBr4/THF, ring opening of the trisubstituted alpha-cyano alpha-hydroxymethyl epoxides while disubstituted alpha-enol aldehydes are prepared through HX opening of the corresponding tetrasubstituted epoxide alcohols protected as acetate, followed by Ni(OAc)2 decyanation of the intermediate cyanhydrins and by NaOAc deprotection of the formed alpha,alpha'-functionalized ketones.