BIS(ALK-2-ENYL)ZINK AUS ORGANOMAGNESIUMHALOGENIDEN

Article abstract of DOI:10.1016/S0022-328X(00)81022-0

The dialk-2-enyl zinc compounds II, XI-XIV can be prepared via reaction of ZnCl2 with the corresponding alk-2-enylmagnesium halides I, VII-X at 20-35 deg C in ether in 68-94percent yield.Diprop-2-enylzinc (II) oligomerizes into 2-allylpropane-1,3-diylzinc (III) during attempted sublimation at 30-50 deg C.The yield of II decreases therefore to < 15percent.The oligomerization can be prevented by complexation of II with dioxane.In this case II is obtained in 86percent yield by cleavage of the dioxane complex.