Patent ID: 9434671
Filing Date: 2016-09-06
CPC Classification: C07B,C07C

Claim Text:
1. A process of a cis/trans isomerization of an unsaturated compound A having at least one but not more than two conjugated carbon-carbon double bonds, the compound A being selected from the group consisting of unsaturated ketones, unsaturated ketals, unsaturated aldehydes, unsaturated acetals, unsaturated carboxylic acids, esters of an unsaturated carboxylic acid, amides of an unsaturated carboxylic acid and unsaturated alcohols, wherein the process comprises the steps of: a) providing a cis or a trans isomer of the unsaturated compound A; b) adding nitrogen monoxide to the cis or trans isomer of the unsaturated compound A of step a) to form a mixture thereof; c) heating the mixture of nitrogen monoxide and cis or trans isomer of the unsaturated compound A to a temperature of between 10° C. and the boiling point of the unsaturated compound A, thereby leading to a mixture of cis/trans isomers of the unsaturated compound A.