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Abstract

A process for producing l-isopulegol by simple operations with safety in high yield. A process for producing isopulegol, which comprises selectively cyclizing citronellal in the presence of a tris(2,6-diarylphenoxy)aluminum catalyst represented by the following general formula (3): ##STR1## wherein Al represents an aluminum atom, Ar.sup.1 and Ar.sup.2 each represent a substituted or unsubstituted aryl group or a heteroaryl group; and R.sup.1, R.sup.2 and R.sup.3 each represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atom(s), an alkoxy group having 1 to 8 carbon atom(s), a substituted or unsubstituted aryl group, a dialkylamino group having 1 to 4 carbon atom(s), or a nitro group.

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First Claim