The reaction of three equiv. of a chiral imidazolium or triazolium perchlorate with one equiv. of Pd(OAcj2, an excess of NaI and a base leads to the corresponding chiral dicarbenediiodopalladium(I1) complexes in chemical yields up to 98% and with the trons isomer as the major product (1, 2). If only one equiv. of the imidazolium or triazolium perchlorate is used, then dinuclear complexes with bridging iodine atoms are formed (3,4, chemical yield 92-94 %). The latter can add Lewis basic ligands, e.g. amines, phosphanes or other carbenes, to give mononuclear complexes with one carbene ligand coordinated to the PdI, fragment (5, 6). Preliminary test experiments with these Pd(I1) complexes as catalysts for an enantioselective Heck-type reaction have been carried out.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.