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Pure Appl. Chem., 2004, Vol. 76, No. 3, pp. 537-540

Negative nonlinear effect in aquo palladium catalysis depending on tropos biphenylphosphine ligand chirality controlled by chiral diaminobinaphthyl activator

K. Mikami, Kohsuke Aikawa and Masahiro Yamanaka

Department of Applied Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan

Abstract: Asymmetric activation of aquo Pd catalysts with tropos biphenylphosphine (BIPHEP) ligands by a chiral diaminobinaphtyl (DABN) activator exhibits a remarkable negative nonlinear effect, (–)-NLE, with higher catalytic efficiency than that achieved by enantiopure atropos BINAP- or tropos BIPHEP-Pd catalysts without DABN activator.