The invention relates to a catalytic system for use in a process for the preparation, in a single step, of enones by an aldol condensation of a ketone, such as a gem-dimethyl cyclohexylethanone or gem-dimethyl cyclohexenylethanone derivative, with an aldehyde in the presence of a novel catalytic system and a co-ingredient, such as a carboxylic acid anhydride or an anhydrous salt, and without the pre-formation of an enolate. The catalytic system is a metal complex, such as a [(Cl)
n
(alkoxy)
4-n
Ti] or [(Cl)
n
(alkoxy)
4-n
Zr] complex where n is 1 to 3.
本发明涉及一种催化系统,用于制备烯酮的过程中,通过醛缩合成醛缩物,一步法制备烯酮,所述烯酮由酮和醛缩合而成,所述酮是gem-二甲基
环己基乙酮或gem-二甲基
环己烯基乙酮衍
生物,在新的催化系统和共同成分的存在下,如
羧酸酐或无
水盐,而不需要预先形成烯醇。催化系统是
金属配合物,例如[(Cl)n(烷氧基)4-nTi]或[(Cl)n(烷氧基)4-nZr]配合物,其中n为1至3。