Process for the preparation of cycloaliphatic ketones of formula ##STR1## wherein index m designates integer 0, 1 or 2, n stands for 0 or 1 and the dotted lines represent an optional supplemental bond, which process consists in the deprotonation of an ester of formula ##STR2## having either an isolated double bond in position 1 or 2 (exocyclic), or two conjugated double bonds in position 1 and 3 or 2 (exocyclic) and 3 as indicated by the dotted lines, and wherein symbol R' represents a linear or branched alkyl radical, preferably a C.sub.1 -C.sub.6 alkyl radical, or a substituted or unsubstituted phenyl, and Y designates an oxygen or a sulphur atom, the deprotonation being followed by the addition of an organo-metallic compound of formula ##STR3## wherein m and n have the meaning defined above and Z represents a MgX radical or an alkali metal, preferably lithium, X defining a halogen and the dotted lines an optional supplemental bond, and finally a hydrolysis.
制备环脂族酮的过程,其
化学式为##STR1##,其中指数m代表整数0、1或2,n代表0或1,点线表示可选的补充键。该过程包括使化合物##STR2##去质子化,该化合物具有位于1或2位(外环)的孤立双键或位于1和3位(外环)的两个共轭双键和2位,如点线所示。其中符号R'代表线性或支链烷基基团,优选为C.sub.1-C.sub.6烷基基团,或取代或未取代的苯基,Y代表氧或
硫原子。去质子化后,加入具有式##STR3##的有机
金属化合物,其中m和n具有上述定义,Z代表MgX基团或碱
金属,优选为
锂,X定义卤素,点线表示可选的补充键,最后进行
水解。