Patent ID: 6191298
Filing Date: 2001-02-20
Classification: C07F

Abstract:
A process for the preparation of a thioalkenylphosphonic acid ester of the following formula (I):R.sup.1 C(SR.sup.3).dbd.CHP(.dbd.O)(OR.sup.2).sub.2 (I)wherein R.sup.1 stands for a monovalent group selected from hydrogen atom, an alkyl group, a cycloalkyl group, a cycloalkenyl group, an aryl group, an aralkyl group, an alkenyl group and a silyl group, R.sup.2 stands for an aryl group and R.sup.3 stands for an aryl group, comprising reacting an acetylene compound of the following formula (II):R.sup.1 C.tbd.CH (II)wherein R.sup.1 is as defined above, with a phosphorothioate of the following formula (III):(R.sup.2 O).sub.2 P(.dbd.O)SR.sup.3 (III)wherein R.sup.2 and R.sup.3 are as defined above, in the presence of a palladium complex catalyst.