• Undergoes a vinylogous Reformatsky reaction with carbonyl compounds, to give δ-hydroxy-ɑ?-unsaturated esters: Liebigs Ann. Chem., 709, 29 (1967). Use of a Zn-Ag couple allows Reformatsky coupling to be carried out with or without allylic rearrangement depending on whether ether or THF is used as the solvent: Synth. Commun., 19, 2355 (1989). For a review of the Reformatsky synthesis, see: Synthesis, 571 (1989).