Electrophilic Substitution with Allylic Rearrangement (SE′). Anti Stereoselectivity in Trifluoroacetolysis of Some CycIohex-2-enylsilanes, -germanes, and -stannanes

Trifluoroacetolysis of various cyclohex-2-enylsilanes, -germanes, and -stannanes is demonstrated to be γ regiospecific and highly anti stereoselective, as predicted for a dominating LUMO-HOMO interaction in a concerted S2′ process.