Rhodium-catalysed alkoxycarbonylative cyclisation reactions of 1,6-enynes
The rhodium-catalysed carbonylation of 1,6-enynes possessing an electron-deficient alkenyl moiety in an alcohol reagent in the presence of a rhodium complex proceeded stereo- and chemoselectively to afford exocyclic α,β-enoates.
Ziyanak, Firat,Kus, Melih,Artok, Levent
experimental part
p. 897 - 902
(2011/06/22)
Stereoselective synthesis of Z-α-aryl-α,β-unsaturated esters
An efficient method for the stereoselective synthesis of (Z)-α-arylacrylates is described. Treatment of α-hydroxyesters with triflic anhydride and pyridine at 0 °C followed by warming to room temperature afforded the corresponding (Z)-α-aryl-α,β- unsatura
Mani, Neelakandha S.,Mapes, Christopher M.,Wu, Jiejun,Deng, Xiaohu,Jones, Todd K.
p. 5039 - 5042
(2007/10/03)
From Stoichiometry to Catalysis: Electroreductive Coupling of Alkynes and Carbon Dioxide with Nickel-Bipyridine Complexes. Magnesium Ions as the Key for Catalysis
The incorporation of carbon dioxide into nonactivated alkynes catalyzed by electrogenerated nickel-bipyridine complexes affords α,β-unsaturated acids in moderate to good yields.The electrocarboxylation reaction was undertaken on a preparative scale in the presence of a sacrificial magnesium anode: the formation of acids from alkynes is stoichiometric with respect to the nickel complex if performed in a two-compartment cell but can be made catalytic in a single-compartment cell.An intermediate nickelacycle was isolated from the reaction with 4-octyne.The cleavage ofthis metallacycle by magnesium ions is the key step to explain catalysis.
Derien, Sylvie,Dunach, Elisabet,Perichon, Jacques
p. 8447 - 8454
(2007/10/02)
A CONVENIENT SYNTHESIS OF ATROPATE DERIVATIVES
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Slougui, Nasser,Rousseau, Gerard
p. 401 - 408
(2007/10/02)
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