Synthesis of vinyl- and allylphosphonates by olefin cross-metathesis

Abstract

Substituted allyl and vinyl phosphonates have been prepared for the first time via intermolecular olefin cross-metathesis (CM) using 1,3-dimesityl-4,5-dihydro-imidazol-2-ylidene ruthenium alkylidene complex 3 in good yield. A variety of terminal olefins, styrenes, and geminally disubstituted olefins have been successfully employed in these reactions. In addition, CM of vinylphosphonates provide exclusive E olefin stereochemistry.