PREPARATION AND 13C NMR CHARACTERIZATION OF γ,γ'-DISUBSTITUTED ALLYLLITHIUM COMPOUNDS

Article abstract of DOI:10.1016/0022-328X(85)88087-6

Two γ,γ'-disubstituted derivatives of allyllithium have been prepared by the classical transmetallation route between phenyllithium and allyltriphenyltin derivatives.These compounds substituted with methyl and ethyl groups or methyl and neopentyl groups in the γ-position were studied by 13C NMR in diethyl ether and tetrahydrofuran.The results are compared with those previously reported for monosubstitution.Charge distributions are not greatly different but the trans configuration is more stable in the disubstituted derivatives.