(51) H. Bestmann and H. Schulz, Justus Liebigs Ann. Chem., 674, 11 (1964).(52) WS Wadsworth and WD Emmons, J. Am. Chem. Soc., 83, 1733 (1961); J. Wolinsky and K. Erlckson, J. Org. Chem., 30, 2208 (1965).(53) The halide is commercially available (Aldrich) or can be prepared by the method of EA Braude and EA Evans, J. Chem. SOC., 3333 (1956), followed by spinning band distillation.(54) The enone vinyl proton in 1 and 23 ...