The reaction of 2-ethoxy-3-alkenenitriles with tributylstannyllithium gave the SN2′ product, γ-ethoxyallylstannanes (3), in good yields. When 3 have a trimethylsiloxyl group at δ-position, the corresponding substituted 2-ethoxy-1,3-butadienes were produced by the elimination of trimethylsiloxystannane.