Microwave Promoted Reductive Coupling of Carbonyl Compounds to Bis(Trimethylsilyl) Pinacols Under Solvent-Free Conditions
作者:Mohammad Bolourtchian、Reza Zadmard、Mohammad R. Saidi
DOI:10.1080/00397919808007176
日期:1998.6
Abstract Reductive coupling of carbonylcompounds was performed with trimethylchlorosilane (TMS-Cl) on montmorillonite K10 clay in conventional microwave oven in short time wih quantitative yields of bis(trimethylsilyl) pinacols.
Ytterbium metal reacts with trimethylsilyl bromide (TMS-Br) to give divalent YbBr2. YbBr2 thus formed in situ, causes coupling reactions of aliphatic ketones and α,β-unsaturatedketones to give bissilylated 1,2-diols and 1,6-ketones, respectively, in good yields.
The Catalytic Pinacol Rearrangement of 1,2-Diols Using an Antimony(V) Salt.
作者:Tsunehiro Harada、Teruaki Mukaiyama
DOI:10.1246/cl.1992.81
日期:——
In the presence of a catalytic amount of antimony(V) chloride or antimony(V) salt generated from antimony(V) chloride and silver hexafluoroantimonate, the pinacol rearrangement of several 1,2-diols or their trimethylsilyl ethers proceeds smoothly to give the corresponding ketones in good yields.