Preparation and reactions of water stable hypervalent 10-Sn-5 allyl ate complexes

Hypervalent 10-Sn-5 allyl and crotyl tin ate complexes bearing Martin ligan ds were prepared and found to be surprisingly stable in water. these compou nds were found to react with aldehydes in the presence of week Lewis acids such as LiBr to give the corresponding homoallyl alcohols. Product analysis of the reaction of the crotyl compounds indicated that the reaction occurr ed via a cyclic transition state unlike an acyclic transition state operati ve for widely utilized allyltrialkyltin reagents that ave of ordinary valen cy. (C) 2001 John Wiley & Sons, Inc.