γ-Ethoxyallenylstannane was obtained by the reaction of 2-ethoxy-3-alkynenitrile or 1- ethoxy-1-(phenylthio)-2-alkyne with tributylstannyllithium in good yield. The reaction of 1, 1- bis-(phenylthio)-2-alkyne with tributylstannylcopper (I) reagent gave γ-(phenylthio) allenylstannane which, in turn, was treated with acetal in the presence of TiCl 4, to afford the propargyl sulfide derivative predominantly.
