| abstract |
【Task】 A catalyst that retains the high catalytic activity and high reaction selectivity of the noble metal complex catalyst, is stable to water and is insoluble in the reaction solvent containing water, and can be easily separated and recovered from the product and reused. Provided are a heterogeneous Lewis acid catalyst, a hydroxyapatite serving as the catalyst, and a method for producing the same. [Solution] General formula: Ca 10-Z (HPO 4 ) Z (PO 4 ) 6-Z (OH) 2-Z · nH 2 O [Wherein Z is a number from 0 to 1 and n is a number from 0 to 2.5] Cationic ruthenium-supported hydroxyapatite obtained by supporting cationic ruthenium on the hydroxyapatite represented by the formula, a catalyst comprising the cationic ruthenium-supported hydroxyapatite, and a method for producing the same. [Selection] Figure 1 |