PREPARATION OF OPTICALLY ACTIVE 2-ACYL CHROMAN COMPOUNDS AND CATALYST PRECURSOR USED THEREFOR

摘要

PROBLEM TO BE SOLVED: To obtain an optically active 2-acyl chroman compound in a high yield.SOLUTION: The optically active 2-acyl chroman compound is obtained in a high yield with a high enantiomeric excess by the reaction of a keto phenol compound with hydroperoxide in the presence of an N-spiro C-asymmetric chiral quaternary ammonium iodide as a catalyst precursor.