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Copper-bipyridine catalyst system

The influence of Lewis acids on the 4 + 2-cycloaddition of (2ft,2/ft)-A,iV/-fumaro-ylbis[fenchane-8,2-sultam] with cyclopentadiene and cyclohexadiene was investigated by IR studies of the sultam compexes with various Lewis acids.101 The first enantios-elective silicon Lewis acid catalyst (91) catalysed the Diels-Alder cycloaddition of methacrolein and cyclopentadiene with 94% ee.102 [A1C13 + 2THF] is a new and efficient catalytic system for the Diels-Alder cycloaddition of a,/9-unsaturated carbonyl compounds with dienes under solvent-free conditions.103 Dendritic copper(II) triflate catalysts with a 2,2 -bipyridine core (92) increased the chemical yields of Diels-Alder adducts.104... [Pg.398]

The Sonogashira coupling reaction of terminal alkynes with aryl or vinyl halides is a useful tool for carbon—carbon bond formation, and has found wide employment in areas such as natural product synthesis, the pharmaceutical industry, and material sciences. Novel recyclable Pd catalysts with fluorous ponytails in the ligand 2,2 -bipyridine were reported in a copper-free Pd-catalyzed Sonogashira reaction in a fluorous biphasic system (FBS) (Equation 4.19). The catalysts are only soluble in perfluorinated solvents at room temperature [41],... [Pg.104]

See other pages where Copper-bipyridine catalyst system is mentioned: [Pg.105]    [Pg.105]    [Pg.42]    [Pg.30]    [Pg.59]    [Pg.271]    [Pg.87]    [Pg.24]    [Pg.53]    [Pg.456]    [Pg.20]    [Pg.158]    [Pg.384]    [Pg.1060]    [Pg.107]    [Pg.1135]    [Pg.500]    [Pg.424]    [Pg.126]    [Pg.885]    [Pg.1365]    [Pg.35]    [Pg.92]    [Pg.90]    [Pg.905]    [Pg.450]    [Pg.450]    [Pg.130]    [Pg.78]    [Pg.268]   
See also in sourсe #XX -- [ Pg.105 ]



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