Iron-Catalyzed Radical Annulation of Unsaturated Carboxylic Acids with Disulfides for the Synthesis of γ-Lactones
An efficient aerobic iron-catalyzed annulation of unsaturated carboxylic acids with disulfides has been developed. This procedure proceeds using FeCl3as the catalyst and KI as an iodine source under an air atmosphere, which provides practical access to a wide range of substituted γ-lactone derivatives. The disclosed method is quite simple, highly atom-economic, environmentally friendly, and tolerates a broad substrate scope.
A Novel Method for the Chlorolactonization of Alkenoic Acids Using Diphenyl Sulfoxide/Oxalyl Chloride
A facile chlorolactonization of alkenoic acids by treatment with diphenyl sulfoxide/oxalyl chloride has been developed. The reaction can generate various chlorolactones in moderate to good yields, wherein the chlorodiphenylsufonium salt derived from diphenyl sulfoxide/oxalyl chloride serves as the source of Cl +.
EXTENDED ENOLATE IONS FROM γ-PHENYLTHIO-CROTONATE ESTERS
Substituted γ-phenylthio-crotonate esters (7) can be made by and PhS shifts: they form extended enolate anions which react with electrophiles at the carbon atom α to the carbonyl group and γ to sulphur.
Brownbridge, Peter,Hunt, Paul G.,Warren, Stuart
p. 3391 - 3394
(2007/10/02)
ADDITION OF SULFENYL CHLORIDES TO DERIVATIVES OF β,γ-UNSATURATED ACIDS AND HYDROLYSIS OF OBTAINED ADDUCTS
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Potsyute, N. K.,Rasteikene, L. P.,Knunyants, I. L.
p. 1678 - 1683
(2007/10/02)
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