Abstract
An aldol‐type reaction catalyzed by a Ti‐(S)‐BINOL complex using with a diketene as substrate is described herein. The complex derived from 1.0 molar equivalent of Ti(O‐i‐Pr)4 and 2.0 molar equivalents of (S)‐BINOL gave (S)‐isopropyl 5‐hydroxy‐7‐phenyl‐3‐oxo‐6‐heptenoate with high enantioselectivity.
Acknowledgments
We thank the technical staff at the Materials Analysis Center of our institute.