Patent ID: 7728154

Claim:
A process for the preparation of a 1-aryl-3,4-dihydro-1H-naphthalene -2-one represented by the following general formula (1), wherein a is an integer of 0 to 5, b is an integer of 0 to 4, R 1 and R 2 are alkyl groups, alkoxy groups, aralkoxy groups, substituted amino groups, cyano groups, halogen atoms, aralkyl groups or aryl groups, when a or b is 2 or more, a plurality of R 1 or R 2 may be different from each other, and two R 1 or R 2 at adjacent positions may be bonded together to form a divalent group represented by the following formula (1a), —(O) l —(R 7 O) m —(R 8 ) n — (1a) wherein R 7 and R 8 are alkylene groups, and l, m and n are, respectively, integers of 0 to 3 under a condition in which they are not all zero, and R 3 to R 6 are, respectively, hydrogen atoms, alkyl groups, alkoxy groups, aralkoxy groups, substituted amino groups, cyano groups, halogen atoms, aralkyl groups or aryl groups, comprising: isomerizing epoxy compound (2) in an organic solvent in the presence of magnesium sulfate wherein a, b and R 1 to R 6 are as defined in the above general formula (1).