申请人:Firmenich, SA
公开号:US04499297A1
公开(公告)日:1985-02-12
Cyclopentenones of formula ##STR1## wherein each of symbols R.sup.1 and R.sup.2, when taken separately, represents an alkyl radical of C.sub.1 to C.sub.6, or a hydrogen atom, or, when taken together, they represent a polymethylene, or one of them designates a hydrogen atom and the other an alkyl radical of C.sub.1 to C.sub.6, are prepared starting from compounds having formula ##STR2## wherein R stands for a C.sub.1 to C.sub.6 alkyl radical or a phenyl group, via a catalytic reaction promoted by a metallo-organic compound of formula MeX.sub.2 (R.sup.3 CN).sub.2 (III) wherein Me represents palladium or platinum, R.sup.3 represents a C.sub.1 to C.sub.3 alkyl radical or a phenyl group and X defines a halogen atom.
式为##STR1##的环戊烯酮,其中每个符号R.sup.1和R.sup.2,单独取时,代表C.sub.1至C.sub.6的烷基基团或氢原子,或者当它们一起取时,它们代表一个聚亚甲基,或其中一个指示氢原子,另一个指示C.sub.1至C.sub.6的烷基基团,可以从具有式##STR2##的化合物开始制备,其中R代表C.sub.1至C.sub.6的烷基基团或苯基,通过由式MeX.sub.2(R.sup.3CN).sub.2(III)的金属有机化合物促进的催化反应制备,其中Me代表钯或铂,R.sup.3代表C.sub.1至C.sub.3的烷基基团或苯基,X定义为卤素原子。