The reaction of organomanganese reagents such as RMnX, R2Mn, R3MnLi and R3MnMgX with cyclohexenone has been studied. Two major pathways have been observed : conjugate addition and β reductive dimerization. Similar results have been obtained with organomagnesium compounds in presence of a catalytic amount of manganous salts.
Migratory insertion reactions of organometallics. 3. Carbon-carbon bond forming reactions of organotransition metals with .alpha.- or .gamma.-haloorganolithium reagents