2002 pyridine derivatives

pyridine derivativesR 0380

50 - 106Dicationic Electrophilic Systems: The Activation of Carbocationsand Carboxonium Ions by Pyridinium Groups and Related Heterocy-cles. — Unsaturated pyridinium salts such as (I) and (IV) or the analogousimidazolium salt (VI) form dicationic species in superacidic Tf-OH which arereadily trapped by benzene (II) to yield the products (III), (V) and (VII)of electrophilic substitution. — (ZHANG, YUN; KLUMPP, DOUGLAS A.;Tetrahedron Lett. 43 (2002) 38, 6841-6844; Dep. Chem., Calif. State Polytech.Univ., Pomona, CA 91768, USA; EN)

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