PROCESS FOR THE PREPARATION OF A BENZENE DERIVATIVE.

摘要

A substituted benzene derivative is prepared in a process, which comprises reacting a furan derivative of formula (I): wherein R is an alkyl group, with an olefin of formula (II): wherein R1 and R2 are the same or different and independently are selected from the group consisting of hydrogen, -CN, -CHO and -COOR3, wherein R3 is selected from hydrogen or an alkyl group, or R1 and R2 together form a -C(0)-0-(0)C- group, with the proviso that R1 and R2 are not both hydrogen, to produce a bicyclic ether; and dehydrating the bicyclic ether to obtain a benzene derivative. The benzene derivative thus obtained can suitably be converted to a benzene carboxylic acid compound by oxidation.