Abstract
The synthesis of enantiomerically pure palladium cyclic allyl complexes is accomplished by reaction of “PdHBr” with several chiral cyclic terpenes. The strategy used involves a 100% stereoselective Pd-migration from an attached chain to the ring through a chiral carbon (“gated migration”). “PdHBr” species are produced by β-H elimination in the benzylic moiety of [Pd2(μ-Br)2(η3-PfCH2CHPh)2] (1, Pf = C6F5). The allylic complexes prepared are transformed by carbonylation reactions into chiral unsaturated methyl esters.
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