Method for producing unsaturated compounds

摘要

The invention relates to a method for producing compositions containing unsaturated compounds, wherein (A) one or more unsaturated monocarboxylic acids having 10 to 24 C-atoms or esters of said monocarboxylic acids and optionally (B) one or more compounds having at least one C═C double bond (wherein the compounds (B) are different from the compounds (A)) are subjected to a tandem isomerization/metathesis reaction sequence in the presence of a palladium catalyst and a ruthenium catalyst, providing that the palladium catalysts used are compounds that contain at least one structural element Pd—P(R1R2R3), wherein the radicals R1 to R3, independently of one another, each comprise 2 to 10 C-atoms, which may be aliphatic, alicyclic, aromatic or heterocyclic respectively, providing that at least one of the radicals R1 to R3 contains a beta-hydrogen, wherein the palladium catalyst is used as such or is produced in situ, providing that the method is carried out in the absence of substances that have a pKa value of 3 or less.

主权项

1. A process for preparing compositions comprising unsaturated compounds, wherein (A) one or more unsaturated monocarboxylic acids having 10 to 24 carbon atoms or esters of these monocarboxylic acids are subjected to a tandem isomerization/metathesis reaction in the presence of a palladium catalyst and of a ruthenium catalyst, with the proviso that the palladium catalyst is a compound of formula (I-a): in which the spacer X is bromine and Y1 is a P(R1R2R3) wherein the R1, R2 and R3 radicals are each defined as tert-butyl, the palladium catalyst being used as such or generated in situ, with the proviso that the process is performed in the absence of substances having a pKa of 3 or less.