申请人:Rhone-Poulenc Sante
公开号:US04556742A1
公开(公告)日:1985-12-03
.alpha.,.delta.-Diethylenic carbonyl compounds of the formula ##STR1## are made by an oxy-Cope rearrangement of an acetylenic alcohol of the formula ##STR2## in the presence of a catalyst based on a metal of Group Ib of the periodic table or palladium. In the formulae (I) and (II), R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be identical or different, each denote a hydrogen atom or a hydrocarbon radical R.sub.2 and R.sub.3 being capable together of forming an alkylene radical (--CH.sub.2 --).sub.n in which one or more carbon atoms may be substituted by one or more alkyl radicals containing 1 to 4 carbon atoms, n is 3 to 20 inclusively and R.sub.5 denotes a hydrogen atom.
式子为##STR1##的.alpha.,.delta.-二乙烯基羰基化合物是由在Ib族金属或钯基催化剂存在下,通过式子为##STR2##的炔醇的氧Cope重排反应制得。在公式(I)和(II)中,R.sub.1,R.sub.2,R.sub.3和R.sub.4,它们可以相同也可以不同,每个代表一个氢原子或一个烃基,R.sub.2和R.sub.3可以共同形成一个含有1到4个碳原子的烷基(-CH.sub.2-).sub.n,其中一个或多个碳原子可以被一个或多个含有1到4个碳原子的烷基取代,n为3到20,R.sub.5代表一个氢原子。