- An easy formation of dithioacetals on alumina-KF under microwave irradiation. Synthesis of new potential antiviral phosphonates
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The preparation of dithioacetals by the reaction of methylene compounds with S-methyl methanesulfonothioate on Al2O3-KF is described. Microwave irradiation without solvent provides a powerful activation. Potential antiviral phosphona
- Villemin,Ben Alloum,Thibault-Starzyk
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- On the thermal Pummerer rearrangement of substituted sulfoxides
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Sulfoxides bearing thioester and ester groups at the position under heating at ca. 140C undergo Pummerer thermal rearrangement. However, for sulfonyl sulfoxide, a complex mixture of products is formed. Plausible mechanism is advanced(equation presented. 2013
- Marzorati, Liliana,Yoshikawa, Eduardo K.C.,Braga, Ataualpa A.C.,Di Vitta, Claudio
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p. 248 - 260
(2014/04/03)
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- New Decarboxylation, De-ethoxycarbonylation and Desulfonylation, followed by Sulfenylation of some Half-Esters of Malonic Acids and α-Sulfonylmalonic Esters
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The sulfenylation of some half-esters of malonic acids and some α-sulfonylmalonic esters with several sulfenylating reagents was investigated.Evidence was provided that in the case of the half-esters, in which NaH-dimethyl sulfoxide was employed, the formation of α,α-disulfenylated carboxylic esters may occur by two different reaction sequences, initiated either by dianion formation or decarboxylation.It is shown that, in the case of the α-sulfonylmalonic esters, in which diazabicyclooctane in refluxing toluene was employed, two competitive reactions may take place: de-ethoxycarbonylation or desulfonylation, both followed by sulfenylation.
- Wladislaw, Blanka,Marzorati, Liliana,Donnici, Claudio L.
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p. 3167 - 3170
(2007/10/02)
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