Stereoselective migration of sterically hindered organoboranes in cyclic and acyclic systems. A stereoselective allylic C–H activation reaction
作者:Eike Hupe、Dmitri Denisenko、Paul Knochel
DOI:10.1016/j.tet.2003.09.043
日期:2003.11
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.
A One-Pot Cross-Pinacol Coupling/Rearrangement Procedure
作者:Ulf Scheffler、Rainer Mahrwald
DOI:10.1002/hlca.201200402
日期:2012.10
A new catalytic retro‐pinacol/cross‐pinacol reaction, followed by subsequent rearrangement or deoxygenation of the intermediately formed vicinal diols, is described. This operationally simple one‐pot protocol allows isolation of geminal α,α‐diphenyl ketones or 1,1‐diphenyl alkenes with high yields and selectivities.