Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Jacques Dubac"'
Publikováno v:
Tetrahedron Letters. 44:2037-2040
The Friedel–Crafts acylation of activated and polycyclic aromatics is efficiently catalyzed by bismuth(III) chloride which is generated in situ from bismuth(III) oxychloride, a water insensitive and eco-friendly material. Bismuth(III) oxychloride i
Publikováno v:
Synlett. 2001:0493-0496
Autor:
Christian Laporte, Jean-Roger Desmurs, Andre Laporterie, Julien Marquié, Nicolas Roques, Jacques Dubac
Publikováno v:
Industrial & Engineering Chemistry Research. 39:1124-1131
Solvent-free aroylation of benzene and its slightly activated or deactivated derivatives has been carried out under microwave (MW) irradiation, in the presence of iron(III) chloride which, in these conditions, shows better activity than other metalli
Publikováno v:
The Journal of Organic Chemistry. 64:6479-6482
Sulfonylation reactions are one of the most important groups of aromatic electrophilic substitutions.1 The sulfonyl group is a widely used synthon for synthetic organic chemists,2 and sulfones have many industrial applications.3 In Friedel-Crafts (FC
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry. 2:455-465
Resume L'acylation d'ethers aromatiques a ete realisee sous irradiation micro-onde, dans des conditions efficaces (temps de reaction court et sans controle de la temperature) et en presence de divers catalyseurs, chlorures, oxydes (essentiellement de
Publikováno v:
European Journal of Organic Chemistry. 1998:2743-2746
A mechanism for acylations catalyzed by bismuth(III) triflate (1) is proposed in the case of the benzoylation of benzene, toluene, and chlorobenzene. With Bz2O as a reagent, 1 acts as a Lewis acid and allows the benzoylation of toluene. It is almost
Publikováno v:
Tetrahedron Letters. 39:1161-1164
In presence of bismuth (III) chloride, a carbonylated electrophile (ethyl mesoxalate or glyoxylate) and usual diene led selectively (65 to 100%) the hetero carbonyl-Diels-Alder reaction with the ene reaction product. BiCl 3 exhibits strong catalytic
Publikováno v:
Liebigs Annalen. 1996:739-741
The coupling of graphite (as a support) with microwaves (as an energy source), a new type of “dry reaction”, was studied for some Diels-Alder reactions involving anthracene and azadienes. Graphite is responsible for a high-temperature gradient le
Publikováno v:
Chemistry of Materials. 9:3012-3016
The thermal decomposition of nonaaquabismuth(III) triflate has been studied by thermogravimetric analysis, from which lower hydrates have been identified. The crystal structure of the tetraaquabismuth(III) triflate, Bi(H2O)4(OSO2CF3)3, has been solve
Autor:
Andre Laporterie, Hafida Gaspard, Jacques Dubac, Mireille Labrouillere, C. Le Roux, J. R. Desmurs
Publikováno v:
Tetrahedron Letters. 38:8871-8874
Bismuth tris-trifluoromethanesulfonate (Bi(OTf)3) was found to be a novel catalyst for the Friedel-Crafts acylation. The reactions of activated or deactivated benzenes such as fluorobenzene proceeded in high yields in the presence of a catalytic amou