[摘要]：stereoselectivity from benzyl bromides by a one-pot homologation/stereoselective elimination procedure. Convenient conditions involving the anion of diiodomethane and an excess of base provide complete consumption of the benzyl bromide and elimination from a diiodoalkane intermediate. Similar conditions provide (E)-b-aryl vinyl chlorides and bromides by employing the anions of ICH2Cl or CH2Br2. The functional group tolerance and facile purifn. allows rapid access to a wide range of functionalized vinyl halides.
