Recommanded Product: Tricyclohexylphosphonium tetrafluoroborate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about High-Yielding Palladium-Catalyzed Intramolecular Alkane Arylation: Reaction Development and Mechanistic Studies. Author is Lafrance, Marc; Gorelsky, Serge I.; Fagnou, Keith.
Palladium-catalyzed alkane arylation reactions with aryl halides are described for the preparation of 2,2-dialkyl-dihydrobenzofuran substrates. These reactions occur in excellent yield and very high selectivity for the formation of one sole product arising from a reaction at nearby Me groups. Mechanistic and computational studies point to the involvement of a concerted, inner-sphere palladation-deprotonation pathway that is enabled by the presence of three-center agostic interactions at the transition state. This mechanism accurately predicts the exptl. observed kinetic isotope effect as well as the site selectivity and should be useful in the design of new reactions and catalysts.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem