October 1993 SYNTHESIS 985 Alkenyl Bromides by Brominative Deoxygenation of Ketones in One or Two Steps]L ... A1, Scheme 1). Isolation of gem-dibromides3 is sometimes possible (eg, 10h and 10p) by running ... s R' f3'Br R2 R3 Methods B: +7, -HCO2Me R2 R5 9 10 l(;dIjIFf ...