The intramolecular photocycloaddition of chalcones to give cyclobutanes has proved to be a fast and convenient method to shrink a cyclophane ring to a tricyclic system, in order to prepare potential ditopic receptors. X-Ray results confirm the previously indicated structure for the cyclobutanes 2a (n=1, m=1), in which the cyclization occurs by a head-to-head syn ring closure. NMR results indicate that the same process occurs for the cyclobutanes 2b (n=2, m=2) and 2c (n=1, m=3). (C) 2003 Elsevier Ltd. All rights reserved.

Photocycloaddition of chalcones to yield cyclobutyl ditopic cyclophanes / Francesca R., Cibin; Nicoletta Di, Bello; Doddi, Giancarlo; Vincenzo, Fares; Mencarelli, Paolo; Elio, Ullucci. - In: TETRAHEDRON. - ISSN 0040-4020. - STAMPA. - 59:50(2003), pp. 9971-9978. [10.1016/j.tet.2003.10.026]

Photocycloaddition of chalcones to yield cyclobutyl ditopic cyclophanes

DODDI, Giancarlo;MENCARELLI, Paolo;
2003

Abstract

The intramolecular photocycloaddition of chalcones to give cyclobutanes has proved to be a fast and convenient method to shrink a cyclophane ring to a tricyclic system, in order to prepare potential ditopic receptors. X-Ray results confirm the previously indicated structure for the cyclobutanes 2a (n=1, m=1), in which the cyclization occurs by a head-to-head syn ring closure. NMR results indicate that the same process occurs for the cyclobutanes 2b (n=2, m=2) and 2c (n=1, m=3). (C) 2003 Elsevier Ltd. All rights reserved.
2003
carbocycles; chalcones; cycloaddition; cyclophanes; enones; photochemistry; photocyclization
01 Pubblicazione su rivista::01a Articolo in rivista
Photocycloaddition of chalcones to yield cyclobutyl ditopic cyclophanes / Francesca R., Cibin; Nicoletta Di, Bello; Doddi, Giancarlo; Vincenzo, Fares; Mencarelli, Paolo; Elio, Ullucci. - In: TETRAHEDRON. - ISSN 0040-4020. - STAMPA. - 59:50(2003), pp. 9971-9978. [10.1016/j.tet.2003.10.026]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/254084
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