An efficient pinacol rearrangment mediated by trimethyl orthoformate has been developed. The reactions of various types of diols with catalytic amount of a Lewis acid in the presence of an orthoester afforded the rearranged product in good yields via a cyclic orthoester intermediate.
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.