New homochiral ortho-palladated matrix bearing a bulky substituent at the carbon stereocenterстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A new homochiral dimeric ortho-palladated complex bearing a bulky tert-butyl substituent at the carbon stereocenter was synthesized from optically active N,N-dimethyl-alpha-tert-butylbenzylamine. Regioselective activation of only the aromatic C-H bond was shown to occur during the cyclometallation process proceeding under very mild conditions due to steric effects. Spectral characteristics of mononuclear derivatives of the new dimeric complex indicate that the five-membered palladacycle exists predominantly in one of two possible chiral conformations with the axial position of the tert-butyl substituent.