Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Palladium alkynyl-aryl coupling

Palladium catalysed alkynyl-aryl coupling preparation of mesitylacetylene27... [Pg.219]

Alkenylboranes (R2C=CHBZ2 Z — various groups) couple in high yields with vinylic, alkynyl, aryl, benzylic, and allylic halides in the presence of tetra-kis(triphenylphosphine)palladium, Pd(PPh3)4, and a base to give R C CHR. 9-Alkyl-9-BBN compounds (p. 1013) also couple with vinylic and aryl halides " as well as with a-halo ketones, nitriles, and esters.Aryl halides couple with ArB(IR2 ) species with a palladium catalyst. ... [Pg.541]

The Suzuki Coupling, which is the palladium-catalysed cross coupling between organoboronic acid and halides. Recent catalyst and methods developments have broadened the possible applications enormously, so that the scope of the reaction partners is not restricted to aryls, but includes alkyls, alkenyls and alkynyls. Potassium trifluoroborates and organoboranes or boronate esters may be used in place of boronic acids. Some pseudohalides (for example triflates) may also be used as coupling partners. [Pg.226]

Stille reaction the palladium-catalyzed reaction of an aryl or vinyl halide with an organotin reagent, where one of the organic groups is alkynyl, aryl, or vinyl, to give a cross coupled product... [Pg.3547]

Palladium-catalyzed cross-coupling involving alkynylmetals and related alkynyl nucleophiles alkynyl-aryl, alkynyl-alkenyl, and alkynyl-alkynyl coupling... [Pg.15]

The Negishi palladium-catalyzed cross-coupling reaction of alkenyl, aryl, and alkynyl halides with unsaturated organozinc reagents provides a versatile method for preparing stereodefined arylalkenes, arylalkynes, conjugated dienes, and conjugated... [Pg.329]

Kang, S.K. Lee, H.W. Jang, S.B. Ho, P.S. (1996) Palladium-catalyzed cross-coupling reactions of aryl-iodonium, alkenyl-iodonium and alkynyl-iodonium salts and iodanes with terminal alkynes in aqueous-medium, Chem. Commun., 835-6. [Pg.216]

Recently, Minami et al. reported the synthesis of 2-methylidene-2/f-chromene 129 by palladium-catalyzed coupling of alkynyl aryl ether 128 with 2e (Scheme 25.62) [62]. [Pg.715]

See other pages where Palladium alkynyl-aryl coupling is mentioned: [Pg.267]    [Pg.78]    [Pg.83]    [Pg.83]    [Pg.36]    [Pg.17]    [Pg.70]    [Pg.161]    [Pg.454]    [Pg.651]    [Pg.255]    [Pg.51]    [Pg.215]    [Pg.545]    [Pg.328]    [Pg.62]    [Pg.607]    [Pg.905]    [Pg.323]    [Pg.448]    [Pg.231]    [Pg.231]    [Pg.1023]    [Pg.32]    [Pg.561]    [Pg.55]    [Pg.197]    [Pg.83]    [Pg.376]    [Pg.118]    [Pg.118]    [Pg.152]    [Pg.742]    [Pg.71]    [Pg.488]    [Pg.42]    [Pg.273]    [Pg.282]    [Pg.21]   
See also in sourсe #XX -- [ Pg.504 ]



SEARCH



Alkynyl coupling

Alkynylation alkynyl-aryl coupling

Aryl coupling

Aryl-alkynyl

Aryl-alkynyl coupling

Palladium alkynylation

Palladium coupling

Palladium-catalyzed alkynyl-aryl coupling

Palladium-catalyzed alkynyl-aryl coupling reactions

© 2024 chempedia.info