Reformatsky-type reactions can occur with or without allylic rearrangement: Liebigs Ann. Chem., 709, 29 (1967); Chem. Lett., 161 (1982); Synthesis, 305 (1990). Reacts with sulfur-stabilized carbanions, e.g. from Benzyl- phenyl- sulfone, by conjugate addition with concomitant displacement of Br-, to give cyclopropane esters: Tetrahedron Lett., 4603 (1979).