| abstract |
PROBLEM TO BE SOLVED: To provide an asymmetric epoxidation catalyst for enones which gives high reactivity, high yield and high optical purity. SOLUTION: In the asymmetric epoxidation reaction of enones, (R) -binaphthol, lanthanum triisopropoxide, lutidine-N-oxide, 1,3-dimethyl-2-imidazolidinone, hexamethylphosphortrione A catalyst containing amide, triphenylphosphine oxide, tri (2-methylphenyl) phosphine oxide or tri (4-methylphenyl) phosphine oxide is used. |