Stereoselective Synthesis of P-C-S Pincer Ligand Coordinated Palladium Complexes by Alkoxypalladation of Chiral Ferrocenylphosphaalkenes

摘要

The chemistry of pincer-complexes has attracted a considerable attention from organic and inorganic chemists because of the interesting reactivity and structural properties. As mentioned above, pincer-complexes proved to be versatile catalyst in organic transformations. Recently, we developed a novel method for the stereoselective synthesis of P-C-N pincer-palladium complexes la and lb containing a phospha-palladacyclopropane, in which the stereochemistry was controlled by the chiral ferrocene moiety. However, these complexes did not show the singnificant catalytic activities. Here, we report the synthesis of new P-C-S pincer complexes derived from the ferrocenylphosphaalkenes bearing an α-ferrocenyl sulfur atom substituent.