still for framstellning of a seconds allylisk alcohol outbound transporter from an isomer tertier allylisk alcohol by 1,3 - transposition of syrefunktionen in the tertiera allyliska alcohol, intermediate products for framstellni

摘要

A method for the preparation of secondary allylic esters or alcohols by allylic rearrangement of the corresponding isomeric tertiary allylic alcohol. The rearrangement is catalyzed by an acid and is carried out in the presence of a carboxylic acid. The free secondary alcohol can be obtained from the ester, formed at the rearrangement, by conventional hydrolysis, transesterification or reduction. The method is particularly suitable for the preparation of pheromones and fragrance substances. A preferred embodiment of the invention concerns the preparation of ipsdienol.