Method of alkene metathesis

Synthetic method

A method of alkene metathesis comprising the reaction of at least one monoalkene with ethene in the presence of a diene. The invention also relates to the use of a diene to promote an ethenolysis reaction conducted on a monoalkene. The metathesis catalyst is preferably an alkylidene ruthenium catalyst such as the benzylidene and indenylidene catalysts shown in a). Preferred ethenolysis reactions include those on cashew nut shell liquid comprising the ethenolysis of cardanol to prepare 3-nonen-8-ylphenol and 1-octene. The ethenolysis of methylated anacardic acid (14) to form methyl-2-methoxy-6-(non-8-en-1-yl)benzoate (15) is also disclosed. Hydrogenation of 3-non-8-enylphenol, ethoxylation of the resultant 3-nonylphenol to provide ethoxy-3-nonylphenol or oligoethoxy-3-nonylphenol (as defined herein) is also disclosed.

Synthetic Method

The invention relates to a method of alkene metathesis. In the method, at least one monoalkene is subjected to ethenolysis in the presence of a diene. The invention also relates to the use of a diene to promote an ethenolysis reaction conducted on a monoalkene. 1. Use of a diene to promote an ethenolysis reaction conducted on a monoalkene.2. The use of claim 1 , which comprises a method of ethenolysis of a monoalkene claim 1 , comprising introducing into a reaction vessel a monoalkene and a diene claim 1 , and subjecting the monoalkene to ethenolysis in the presence of a metathesis catalyst and the diene.3. The use of claim 2 , wherein the metathesis catalyst is an alkylidene ruthenium alkene metathesis catalyst.4. The use of any one of to wherein the carbon-carbon double bond of the monoalkene is a disubstituted carbon-carbon double bond.5. The use of any one preceding claim claim 2 , wherein each carbon atom of the carbon-carbon double bond is attached to an alkylene or alkyl moiety each of which independently comprises from 2 to 7 carbon atoms.6. The use of wherein the carbon-carbon double bond is flanked by two ethylene moieties.7. The use of wherein the carbon-carbon double bond is flanked by two propylene moieties.8. The use of any one preceding claim claim 5 , wherein the monoalkene is an optionally esterified monounsaturated fatty acid.9. The use of claim 8 , wherein the fatty acid comprises from 4 to 28 carbon atoms.10. The use of claim 9 , wherein the fatty acid comprises from 14 to 18 carbon atoms.11. The use of any one of to wherein the carbon-carbon double bond is a cis C═C bond.12. The use of any one of to wherein the carbon-carbon double bond is a trans C═C bond.13. The use of wherein the fatty acid is selected from the group consisting of oleic acid claim 8 , sapienic acid claim 8 , palmitoleic acid claim 8 , myristoleic acid or erucic acid.14. The use of claim 13 , wherein the fatty acid is oleic acid.15. The use of any one of to claim 13 , wherein ...

Synthetic method

The invention relates to a method of alkene metathesis. In the method, at least one monoalkene is subjected to ethenolysis in the presence of a diene. The invention also relates to the use of a diene to promote an ethenolysis reaction conducted on a monoalkene.

Synthetic method

The invention relates to a method of alkene metathesis. In the method, at least one monoalkene is subjected to ethenolysis in the presence of a diene. The invention also relates to the use of a diene to promote an ethenolysis reaction conducted on a monoalkene.