Allylic or saturated organolithium and organomagnesium compounds are shown to readily undergo addition reactions with α,ǵa-difunctional conjugated enynes: (CH3)2NCH2C≡-CCHCHCH2Y (Y OH, OCH3, N(CH3)2).1,4-Addition is observed in all cases which unequivocally leads to α,/'gb-difunctional allenes.