Both poly(3,4-ethylenedioxythiophene) and poly(pyrrole) mediate a pinacolrearrangement of 1,2-diols. The yields of ketone or aldehyde products are comparable to those observed for treatment with mineral acids or Lewis acids. The advantage of this protocol is a two-phase reaction medium in hydrocarbon solvents that allows facile recovery of the products by simple filtration of the polymer and removal
Pinacol Rearrangement and Direct Nucleophilic Substitution of Allylic Alcohols Promoted by Graphene Oxide and Graphene Oxide CO<sub>2</sub>H
作者:Melania Gómez-Martínez、Alejandro Baeza、Diego A. Alonso
DOI:10.1002/cctc.201601362
日期:2017.3.20
Graphene oxide (GO) and carboxylic acid functionalized GO (GO–CO2H) have been found to efficiently promote the heterogeneous and environmentally friendly pinacolrearrangement of 1,2‐diols and the direct nucleophilic substitution of allylic alcohols. In general, high yields and regioselectivities are obtained in both reactions using 20 wt % of catalyst loading and mild reaction conditions.
Retropinacol/Cross-Pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols
作者:Ulf Scheffler、Reinhard Stößer、Rainer Mahrwald
DOI:10.1002/adsc.201200358
日期:2012.10.8
A new concept to access unsymmetrical 1,2-diols with high yields is reported. This new methodology is based on a retropinacol/cross-pinacol coupling process. This transformation is characterized by its operational simplicity and very mild reaction conditions.
Decarboxylative 1,2-rearrangement of cyclic carbonates promoted by Lewis acid
作者:Yoichi Dokai、Kodai Saito、Tohru Yamada
DOI:10.1039/d2cc03024a
日期:——
A Lewis acid-mediated decarboxylative 1,2-rearrangement reaction of cyclic carbonates was developed. The selectivity of the migration of cyclic carbonates was opposite to that of the corresponding 1,2-diols under the same reaction conditions.