In connection with our work on the nature of the butenyl Grigiiard reagent it was desirable to study the coupling reactions of butenylmagiiesium broinide. Henne, Climan and Turk2 have coupled butenyl chlorides in the presence of magnesium while Lespieau and Heitzmanns have reported similar experiments with crotyl bromide, but the results of these investigators are not in agreement. Furthermore, it is not clear whether or not the butenyl Grignard ...
