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Higher order zincates

In 1996, McWilliams and coworkers described a very interesting tandem asymmetric transformation whereby an asymmetric 1,2-migration from a higher-order zincate 60 was coupled with a stereoselective homoaldol reaction (equation 26)29. [Pg.611]

Beside these higher order zincates, an ordinary diarylzincs are capable of undergoing the Negishi reaction with aryl halides, transfering both aryl groups. [Pg.99]

The influence of a range of salt additives in reactions between wBuZnBr and alkyl bromides catalyzed by PEPPSI-IPr (156-iPr) has been investigated. It has been found that bromide salts tend to be superior to chloride or iodide salts and the influence of the cation is minor [270]. The higher order zincate ZnjnBujBrj " has been suggested to be the active transmetallation agent. Its formation depends not... [Pg.330]

McCann LC, Hunter HN, Clybinne JAC, Organ MG (2012) Higher-order zincates as transmetalators in alkyl-alkyl Negishi cross-coupling. Angew Chem Int Ed 51 7024-7027. doi 10.1002/anie.201203547... [Pg.202]

See other pages where Higher order zincates is mentioned: [Pg.599]    [Pg.608]    [Pg.610]    [Pg.611]    [Pg.129]    [Pg.167]    [Pg.324]    [Pg.325]    [Pg.325]    [Pg.325]    [Pg.326]    [Pg.326]    [Pg.324]    [Pg.325]    [Pg.325]    [Pg.325]    [Pg.326]    [Pg.326]    [Pg.99]    [Pg.99]   
See also in sourсe #XX -- [ Pg.99 ]

See also in sourсe #XX -- [ Pg.99 ]



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