Catalytic process for eliminating carboxylic ester and acyl groups from organic compounds

摘要

A process for preparing compounds of the formula I <IMAGE> (I) where: Y inter alia is <IMAGE> where R3 is hydrogen or a C1-C10- hydrocarbon radical. R1 and R2, inter alia, are each, independently of one another, hydrogen, a C1-C20-hydrocarbon radical which optionally carries inert substituents or heteroaryl, wherein a compound of the formula II <IMAGE> (II) where Z is <IMAGE> is reacted in the presence of catalytic amounts of a carbonic ester and of a nitrogenous base at from 100 DEG to 250 DEG C. under a pressure of from 0.01 to 100 bar.