NITROGEN MONOXIDE AS CIS/TRANS ISOMERIZATION CATALYSTS FOR UNSATURATED COMPOUNDS

摘要

The present invention relates to a process of a cis/trans isomerization of an unsaturated 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 and amides of an unsaturated carboxylic acid using nitrogen monoxide as cis/trans isomerization catalyst. It has been observed that the isomerization is very efficient and fast.

主权项

1. A process of a cis/trans isomerization of an unsaturated 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 comprising the steps
a) providing a cis or a trans isomer of a unsaturated compound A; b) adding nitrogen monoxide to the cis or trans isomer of the unsaturated compound A of step a); 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, particularly between 20° C. and the boiling point of the unsaturated compound A; leading to a mixture of cis/trans isomers of the unsaturated compound A.