Process for preparing cyclopentenolones

摘要

A process for preparing cyclopentenolones of the formula: <IMAGE> wherein R1 is a straight, branched or cyclic alkyl group having not more than 6 carbon atoms, a straight, branched or cyclic alkenyl group having not more than 6 carbon atoms, a straight or branched alkynyl group having not more than 6 carbon atoms or a group of the formula: <IMAGE> wherein R2 is a hydrogen atom, a methyl group or a halogen atom directly from the corresponding furan-carbinols of the formula: <IMAGE> wherein R1 is as defined above in a single step with an excellent yield, characterized in that the furan-carbinols are treated with water in the presence or absence of a catalyst.