- Synergic Interplay Between Halogen Bonding and Hydrogen Bonding in the Activation of a Neutral Substrate in a Nanoconfined Space
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The principle of amplified halogen bonding (XB) in a small space is exploited as a catalytic tool for the activation of an XB acceptor substrate in a nanoconfined environment. The inner cavity of the resorcinarene capsule has been equipped with an XB cata
- La Manna, Pellegrino,De Rosa, Margherita,Talotta, Carmen,Rescifina, Antonio,Floresta, Giuseppe,Soriente, Annunziata,Gaeta, Carmine,Neri, Placido
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- Electrosynthesis of Unsymmetrical Polyaryls by a SRN1-Type Reaction
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Unsymmetrical polyaryls are electrosynthesized in liquid ammonia by a single-step SRN1 reaction in the presence of a redox mediator starting from aromatic halides and 2,6-di-tert-butyl phenoxide.With monoaryl halides activated by electron-withdrawing substituents (N of pyridyl or quinolyl, trifluoromethyl, cyano, sulfone, ester, ketone, alkyl sulfide, N(1+) of anilinium), biaryls are obtained in good yields (between 50 and 95percent).The yields of ter- and quateraryls are lower (40percent maximum).The reaction is extended to other ortho-disubstituted phenols.Elimination reactions of the tert-butyl groups from the products are achieved by a Friedel-Crafts reaction using either trifluoromethanesulfonic acid or aluminum trichloride as catalysts.
- Boy, P.,Combellas, C.,Suba, C.,Thiebault, A.
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p. 4482 - 4489
(2007/10/02)
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