Cyclic oxazo derivatives

摘要

Described are intermediate mixtures of cyclic oxazo derivatives having the generic structure: <IMAGE> wherein one of the dashed lines is a carbon carbon double bond and the other two dashed lines are carbon carbon single bonds and n is 0 or 1; R1, R2 and R6 are each the same or different and each represents hydrogen or C1-C3 lower alkyl; and R3, R4 and R5 are each the same or different and each represents hydrogen or methyl; as well as the precursor oxazo derivative having the structure: <IMAGE> Such oxazo derivatives have as their primary use intermediates in reactions whereby mixtures of dihydro alpha ionone, dihydro beta ionone and dihydro gamma ionone or homologues thereof are produced.