| abstract |
PROBLEM TO BE SOLVED: To provide a catalyst and a production method capable of obtaining optically active 4-methyl-2-oxetanone efficiently in a short time and with high optical purity. ) Q − (T 1 ) n − (L)] m (T 2 ) p (1) (wherein L is an optically active bidentate phosphine ligand, T 1 is a carboxylate anion, T 2 is a halogen atom, and excludes a carboxylate anion. An anion, n is 0 to 1, m is 1 to 3, p is 0 to 1, q represents 1 to 1.5 when 1 or m is 2, a ruthenium-iodo-optically active bidentate phosphine complex, a process for producing the same and 4-methylene-2 using the same as a catalyst -Asymmetric hydrogenation of oxetanone. |