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Organozincs copper halides

For polyfluorinated organozinc halides, the zinc insertion is conveniently done with a zinc-copper couple (Scheme 13) . The preparation of trifluoromelhylzinc halides (33) is best achieved using the method of Burton , which involves the reaction of CF2CI2 or CBr2F2 with zinc in DMF. This reaction produces a mixture of CF ZnX (33) and bis-trifluoromethylzinc (34) (Scheme 13) . ... [Pg.295]

The moderate intrinsic reactivity of zinc organometallics can be increased by transmetalation with various transition metal salts. Especially useful is the transmetalation of diorganozincs or organozinc halides with the THF-soluble complex of copper(I) cyanide... [Pg.333]

Boron-sulfur bonds, addition, to alkynes, 10, 778 Boron trihalides, in boron compound synthesis, 9, 146 Boron-zinc exchange and copper-catalyzed substitutions, 9, 518 for organozinc halide preparation, 9, 89 Borostannylation, enynes, 10, 334... [Pg.68]

Subsequent developments indicated that transmetallation to copper was also possible in both catalytic and stoichiometric senses, with the use of the THF soluble copper salt CuCN.2LiCl being especially convenient.7 The formation of these functionalized copper reagents has allowed a substantial increase in the range of products which may be prepared from organozinc halides.8... [Pg.38]

Preparation of organozinc halides using zinc/copper couple... [Pg.39]

Michael-addition reactions can be performed with various zinc/copper reagents derived from organozinc halides. (3-Monosubstituted enones react in... [Pg.180]

Addition of catalytic or stoichiometric quantities of CuCN (TiCl)2 radically increases the reactivity of diorganozinc (R2Zn) and organozinc halide (RZnX) compounds. The resulting copper-zinc species (RCu(CN)ZnR or RCu(CN)ZnX) react with staimyl chlorides (RjSnCl) to give the corresponding alkylated stannyl derivatives (RjSnR)... [Pg.5234]

Asymmetric allylation of cinnamyl halides, alkylation of alkynyl epoxides, and 1,4-addition of nitro olefins" are also successfully demonstrated by combination of an organozinc reagent and a chiral copper phosphoramidite. [Pg.96]

See other pages where Organozincs copper halides is mentioned: [Pg.337]    [Pg.211]    [Pg.267]    [Pg.398]    [Pg.295]    [Pg.295]    [Pg.329]    [Pg.694]    [Pg.114]    [Pg.280]    [Pg.329]    [Pg.114]    [Pg.280]    [Pg.329]    [Pg.99]    [Pg.27]    [Pg.352]    [Pg.882]    [Pg.20]    [Pg.347]    [Pg.95]    [Pg.504]    [Pg.9]    [Pg.46]    [Pg.179]    [Pg.180]    [Pg.180]    [Pg.186]    [Pg.221]    [Pg.1285]    [Pg.96]    [Pg.96]    [Pg.204]    [Pg.523]    [Pg.504]    [Pg.647]    [Pg.467]    [Pg.5234]    [Pg.647]    [Pg.467]   
See also in sourсe #XX -- [ Pg.4 , Pg.5 , Pg.6 ]

See also in sourсe #XX -- [ Pg.4 , Pg.5 , Pg.6 , Pg.11 ]



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Organozinc

Organozinc halides

Organozincates

Organozincs

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