abstract |
The present invention relates to use polymercaptan as cis/trans isomerization catalyst, cis/trans isomerization unsaturated compound A method, the compound A are selected from the group being made up of beta-unsaturated ketone, unsaturated ketal, unsaturated aldehyde, unsaturated acetal, unsaturated carboxylic acid, esters of unsaturated carboxylic acids and unsaturated carboxylic acid acid amides.It has been observed that:The isomerization is highly effective and quick. |