Stereoselective migration of sterically hindered organoboranes in cyclic and acyclic systems. A stereoselective allylic C–H activation reaction

The thermal migration of cyclic and acyclic organoboranes were studied. In most cases, a stereoselective 1,2-dyotropic migration was observed, allowing the stereocontrol of three contiguous chiral centers. Scope and limitations of this thermal migration are presented.