Cobalt-Catalyzed Intramolecular Heck-Type Reaction of 6-Halo-1-hexene Derivatives

Abstract
Treatment of 6-iodo-1-hexene derivatives with trimethylsilylmethyl Grignard reagent in the presence of CoCl2(dppb) in refluxing THF affords Heck-type products, methylenecyclopentanes, in good yields.