Synthesis of new heterocycles through a cation-driven tandem ring-enlargement-annulation reaction |
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| Authors: | Bernard Angela M Cadoni Enzo Frongia Angelo Piras Pier P Secci Francesco |
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| Affiliation: | Dipartimento di Scienze Chimiche, Università degli studi di Cagliari, Cittadella Universitaria di Monserrato, S.S 554, Bivio per Sestu, I-09042 Monserrato (Cagliari), Italy. ppiras@unica.it |
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| Abstract: | [reaction: see text] The thionium ion, generated through a cyclopropylcarbinyl-cyclobutyl ring expansion, is, for the first time, intramolecularly intercepted by activated aromatic rings to generate new versatile 2a-methyl-8b-(phenylsulfanyl-1,2a,3,8b-tetrahydro-2H-cyclobuta[c]chromenes. |
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