STEREOSELECTIVE SYNTHESIS OF EITHER E-DIIODOALKENE OR Z-DIIODOALKENE FROM ALKYNES USING ICI AND IODIDE

Reaction of alkynes with ICI and an iodide source results in the stere oselective formation of diiodoalkenes in moderate to high yield, At r. t., the reaction is stereospecific, resulting in the formation of E-di iodoalkenes, however lowering the temperature and using a more soluble iodide source results in a stereoselective formation of the Z-diiodoa lkenes. (C) 1997 Elsevier Science Ltd.