Process for the preparation of .delta.-ethylenic carbonyl compounds of the formula (I) by the oxy-Cope rearrangement of a diethylenic alcohol of the formula (II), in the presence of a mercuric salt: in formulae (I) and (II), R.sub.1, R.sub.2, R.sub.4, R.sub.5 and R.sub.6, which are identical or different, represent a hydrogen atom or an acyclic hydrocarbon radical and R.sub.3 represents an acyclic hydrocarbon radical, it being understood that R.sub.1 and R.sub.3 can together form a trimethylene radical, or alternatively that R.sub.3 and R.sub.4 can together form an alkylene radical containing 3 to 20 carbon atoms. ##STR1##
通过二
乙烯醇的氧Cope重排反应,存在
汞盐的情况下,制备公式(I)的.delta.-烯醇酮化合物的过程:在公式(I)和(II)中,R.sub.1、R.sub.2、R.sub.4、R.sub.5和R.sub.6相同或不同,表示氢原子或非
环烃基,而R.sub.3表示非
环烃基,其中R.sub.1和R.sub.3可以一起形成三甲基基团,或者R.sub.3和R.sub.4可以一起形成含有3至20个碳原子的烷基基团。## STR1##