A Convenient Synthesis of Z-Allylsilanes with Good Stereoselectivity Promoted by Samarium Diiodide

Synthesis of Z-allylsilanes in high or good yields and with good stereoselectivity is achieved from O-acetylated 1-silyl-3-chloro alcohols promoted by SmI2. The starting compounds were easily prepared from 2-chloroaldehydes and a mechanism is proposed to explain the stereoselectivity of the β-elimination reaction.