Potassium permanganate/carboxylic acid/organic solvent: a powerful reagent for enone oxidation and aryl coupling reactions
作者:Ayhan S. Demir、Hamide Findik
DOI:10.1016/j.tet.2008.05.004
日期:2008.6
with potassiumpermanganate and acetic acid, in which acetoxylation products were obtained in 74–96% yields. The same reaction was carried out with carboxylic acids other than acetic acid, which furnished corresponding acyloxy ketones with the same regioselectivity. For the first time, formyloxylation products were synthesized in a 61–85% yield by using formic acid. The potassiumpermanganate and acetic
Reactions involving electron transfer. II. Reductions of enones with alkali metal solutions
作者:Herbert O. House、Roger W. Giese、Karlheinz Kronberger、Jean P. Kaplan、Joseph F. Simeone
DOI:10.1021/ja00712a033
日期:1970.5
Acyloxylation of Cyclic Enones: Synthesis of Densely Oxygenated Guaianolides
作者:Rubén Marín-Barrios、Ana Leticia García-Cabeza、F. Javier Moreno-Dorado、Francisco M. Guerra、Guillermo M. Massanet
DOI:10.1021/jo500915r
日期:2014.7.18
The alpha'-acyloxylation of cyclic enones with linear carboxylic acids is described. The reaction is promoted by KMnO4 in the presence of a carboxylic acid and its corresponding carboxylic anhydride. The optimization of the reaction has been carried out using the statistical methodology known as design of experiments. The optimized reaction conditions have been evaluated in terms of substrate scope and compatibility with different functional groups. The methodology has been applied to the synthesis of densely oxygenated guaianes and guaianolides.
Cleavage of unsaturated .alpha.-ketols to .omega.-oxo-.alpha.,.beta.-unsaturated acids
作者:Rey Floresca、Masaaki Kurihara、David S. Watt、Ayhan Demir
DOI:10.1021/jo00060a040
日期:1993.4
Sodium periodate is a better reagent than sodium bismuthate, manganese dioxide, or lead tetraacetate for the cleavage of unsaturated alpha-ketols and affords omega-oxo-alpha,beta-unsaturated acids in good yield. The combination of this cleavage reaction and a rhodium(I)-mediated decarbonylation of omega-oxo-alpha,beta-unsaturated esters derived from polycyclic systems provided an enantioselective synthesis of cyclic systems bearing contiguous quaternary centers where one of the centers possessed gem-dimethyl groups.
m-Chloroperbenzoic acid oxidation of 2-trimethylsilyloxy-1,3-dienes. Synthesis of .alpha.-hydroxy and .alpha.-acetoxy enones