Negative nonlinear effect in aquo palladium catalysis depending
on tropos biphenylphosphine ligand chirality controlled by chiral diaminobinaphthyl
activator
K. Mikami, K. Aikawa, and M. 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.
*Plenary and invited lectures presented at the 12th
International Symposium on Organometallic Chemistry Directed Towards
Organic Synthesis (OMCOS-12), Toronto, Ontario, Canada, 6-10 July 2003.
Other lectures are published in this issue, pp.
453-695.
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