We report herein a highly efficient kinetic resolution of PHANOL by chiral phosphoric
acid catalyzed asymmetric acylation. PHANOL enantiomers were well differentiated by
the chiral environment of chiral phosphoric acid, and both the corresponding monoester
and PHANOL were obtained with excellent enantioselectivities (98% ee and 92% ee, respectively).
Detailed examination of the substrates suggests that the presence of two hydroxy groups
in PHANOL was critical for both reactivity and enantioselectivity.
Key words
asymmetric synthesis - chiral biaryl - asymmetric acylation - kinetic resolution -
chiral phosphoric acid