An initial study has been accomplished into the synthetic feasibility of the preparation of diarylcarbenium salt via the direct coupling of aryl (or heteroaryl) aldehydes and arenes (or heteroaryl analogues) in the presence of a strong organic Brønsted acid. A number of stabilized aryl or heteroaryl(3-indolyl)carbenium ions, never previously prepared in the solid state, have been isolated in excellent yields as highly stable o-benzenedisulfonimide salts and have been fully characterized. Their purity has been proven by spectroscopic methods and chemical reduction with NaBH4. An X-ray crystal structure analysis has been performed on one of the products: an azafulvenium species was shown to be the exclusive structure in the solid state.

Preparation and Characterization of Arylor Heteroaryl(3-indolyl)methylium o-Benzenedisulfonimides

BARBERO, Margherita;CADAMURO, Silvano;DUGHERA, Stefano;GERVASIO, Giuliana;VENTURELLO, Paolo
2012-01-01

Abstract

An initial study has been accomplished into the synthetic feasibility of the preparation of diarylcarbenium salt via the direct coupling of aryl (or heteroaryl) aldehydes and arenes (or heteroaryl analogues) in the presence of a strong organic Brønsted acid. A number of stabilized aryl or heteroaryl(3-indolyl)carbenium ions, never previously prepared in the solid state, have been isolated in excellent yields as highly stable o-benzenedisulfonimide salts and have been fully characterized. Their purity has been proven by spectroscopic methods and chemical reduction with NaBH4. An X-ray crystal structure analysis has been performed on one of the products: an azafulvenium species was shown to be the exclusive structure in the solid state.
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diarylcarbenium salt; direct coupling; o-benzenedisulfonimide salts; azafulvenium species
Margherita Barbero; Silvano Cadamuro; Fabrizio Cauda; Stefano Dughera; Giuliana Gervasio; Paolo Venturello
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/100123
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