Interconversion of γ-Silyl α,β-Unsaturated Carbonyl Compounds and Siloxybutadienes by 1,5-Shifts of Silicon between Carbon and Oxygen

Article abstract of DOI:10.1021/jo00323a022

Reaction of lithium bis<(trimethylsilyl)methyl>cuprate (1) with (E)-4-chloro-3-penten-2-one (2-E) gives (E)-4-methyl-5-(trimethylsilyl)-3-penten-2-one (3-E).Photolysis of 3-E at low temperature gives a 56:44 mixture of 3-E and 3-Z.Upon being warmed to 34