The asymmetric activation of binaphthol (BINOL)-zirconium catalysts is
described on the enantioselective allylation of benzaldehyde with all
yltin reagents. This model reaction has been used with the intention o
f establishing a protocol for a zirconium-based catalyst system, to be
followed by structural studies. Initial results are reported that cha
racterise a number of interesting features, namely the influence of an
induction period and a high level of asymmetric activation obtained a
fter addition of a product-like activator. (C) 1998 Wiley-Liss, Inc.