Dimerization of styrenes catalyzed by PhP(O)HOR/Mn(II)/Co(II)/O2

A methodology for the dimerization of substituted styrenes is reported using a PhP(O)HOR/Mn(II)/Co(II)O2 catalyst, in which the alkyl phenylphosphinate compound acted as a catalyst rather than a substrate as is generally observed. Mechanistic studies suggested the reaction most likely proceeded via addition–elimination.

Graphical abstractA methodology for the dimerization of substituted styrenes was developed using a PhP(O)HOR/Mn(II)/Co(II)O2 catalyst, in which alkyl phenylphosphinate acted as a catalyst rather than a substrate, contrary to the generally held view.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Dimerzation of styrenes catalyzed by PhP(O)HOR/Mn(II)/Co(II)/O2 has been devleoped. ► PhP(O)HOR acts as a catalyst rather than a substrate as is generally observed. ► Mechanism studies suggest it most likely proceeds via an addition-elimination pathway.