Stabilization and activation of dienolates with germanium and tin. Stereo- and regioselective aldol reactions, regioselective coupling reactions, and regioselective synthesis of amino acid derivatives
The palladiumcatalysedcoupling reaction of the tinmaskeddienolate (2) with organic halides takes place at the position substituted by thin, thereby providing a new method for C–C bondformation at the γ-position of dienolates.