- Efficient synthesis of vinyl and alkyl sulfides via hydrothiolation of alkynes and electron-deficient olefins using soluble and heterogenized gold complexes catalysts
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Soluble and heterogenized gold complexes catalyze the hydrothiolation of alkynes and electron-deficient olefins in high yields and with high anti-Markovnikov selectivity. Moreover heterogenized catalysts could be recycled in several successive runs withou
- Corma, Avelino,González-Arellano, Camino,Iglesias, Marta,Sánchez, Félix
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scheme or table
p. 49 - 54
(2010/08/06)
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- From vinyl sulfides, sulfoxides and sulfones to vinyl zirconocene derivatives
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An easy and straightforward new method for the preparation of sp 2 zirconocene derivatives from a wide range of heterosubstituted alkenes such as vinyl sulfides, sulfoxides and sulfones is described. In all cases, a complete isomerization of the stereochemistry is observed and only the E-isomer is obtained. The reactivity of the resulting vinylic organometallic can be increased by a transmetalation reaction into organocopper, organozinc or organopalladium species and, therefore, several carbon-carbon formation were easily realized.
- Farhat, Shahera,Zouev, Irena,Marek, Ilan
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p. 1329 - 1337
(2007/10/03)
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- Thiol mediated 5-(π-endo)ortho vinyl radical cyclizations
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The radical reaction of benzenethiol with alkynes 1a-o carried out at 154 °C affords a mixture of thiol/alkyne adduct 3 and benzothiophene 5, deriving from vinyl radical intermediates 2 through hydrogen abstraction and 5-(π-endo)(orthocyclization onto the
- Montevecchi, Pier Carlo,Navacchia, Maria Luisa
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p. 201 - 219
(2007/10/03)
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- Radical Carbonylation of Alkynes in the Presence of Thiols
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Treatment of alkynes with thiols under an atmosphere of carbon monoxide initiated by azobis(isobutyronitrile) (AIBN) gives β-alkylthio-α,β-unsaturated aldehydes.
- Nakatani, Shogo,Yoshida, Jun-ichi,Isoe, Sachihiko
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p. 880 - 881
(2007/10/02)
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- STEREOSELECTIVE SYNTHESIS OF (E)-ALKENYLSILANES FROM ALDEHYDES WITH A REAGENT PREPARED BY CHROMIUM(II) REDUCTION OF Me3SiCHBr2
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Aldehydes are converted to the corresponding (E)-alkenylsilanes with one carbon homologation by means of a gemdichromium reagent prepared by CrCl2 reduction of Me3SiCHBr2 in THF.Transformation of aldehydes into alkenyl sulfides is also achieved with a com
- Takai, Kazuhiko,Kataoka, Yasutaka,Okazoe, Takashi,Utimoto, Kiitiro
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p. 1443 - 1446
(2007/10/02)
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- Synthesis of vinyl sulphides, azido sulphides, and olefins from β-hydroxy-sulphides
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Vinyl sulphides, azido sulphides, and olefins have been prepared from β-hydroxy-sulphides via β-chloro-sulphides; the regio- and stereo-chemistry of these reactions is discussed.
- Dumont, Willy,Krief, Alain
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p. 673 - 675
(2007/10/02)
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