To obtain the corresponding unsaturated cyclic alcohols at a high conversion rate and with a high selectivity from unsaturated cyclic aldehydes possessing unsaturated bonds within a cyclic group.
In the presence of a catalyst containing at least one species of metals selected from the group III, IV, IX, XIII and XIV of the periodic table and a secondary alcohol the corresponding unsaturated cyclic alcohol compound is prepared by reducing selectively the formyl group of the unsaturated cyclic aldehydes without reducing the unsaturated carbon - carbon bonds. As the unsaturated cyclic aldehydes, C5-16 mono- or tri-cyclo-alkenecarbaldehyde and the like can be employed. The reduction reaction may be carried out at 40-120°C and under the hydrogen gas pressure of roughly 0.01-5 MPa.
TANAKA YASUTAKA
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