O'Brien Erin M, Bercot Eric A, Rovis Tomislav
Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA.
J Am Chem Soc. 2003 Sep 3;125(35):10498-9. doi: 10.1021/ja036290b.
Treatment of cyclic anhydrides with stoichiometric amounts of nickel-neocuproine complex generates alkylcarboxylato-nickelalactones upon extrusion of CO. These metalacycles undergo cross-coupling with arylzinc reagents. The generated CO is sequestered in situ by a nickel-dppb complex. The overall sequence effects a secondary sp3(electrophile)-sp2(nucleophile) cross-coupling and allows for control of stereochemistry during the bond-forming event.