New preparative method for optically active 2,2′- and 4,4′-dihydroxybiphenyl derivatives. A new chiral host compound 4,4′-dihydroxy-2,2′,3,3′,6,6′-hexamethylbiphenyl

The title 2,2′- and 4,4′-dihydroxybiphenyl derivatives were efficiently resolved by complexation with an optically active host compound. Other kinds of guest compound were also complexed by the host compounds.