Patent ID: 8283501

Claim:
A method for producing a 6,6′-disubstituted-2,2′-biphenol derivative represented by the following formula (3): wherein, R 1 represents an optionally substituted primary or secondary alkyl group having 1 to 10 carbon atoms or an optionally substituted cycloalkyl group having 3 to 10 carbon atoms, and * represents an axially asymmetric center, comprising: allowing an optically active diamine to act on a 6,6′-disubstituted-5,5′-dihalogeno-3,3′-disubstituted-2,2′-biphenol derivative represented by the following formula (2′): wherein, R 1 is the same as previously defined, R 2 represents a tertiary alkyl group having 4 to 6 carbon atoms, and X represents a halogen atom, separating the resulting salt, and then neutralizing the salt to obtain an optically active 6,6′-disubstituted-5,5′-dihalogeno-3,3′-disubstituted-2,2′-biphenol derivative represented by the following formula (2): wherein, R 1 , R 2 , X and * are the same as previously defined, followed by further allowing a Lewis acid to act on the compound represented by formula (2).