Bernard AM, Cadoni E, Frongia A, Piras PP, Secci F. Synthesis of new heterocycles through a cation-driven tandem ring-enlargement-annulation reaction.
Org Lett 2002;
4:2565-7. [PMID:
12123377 DOI:
10.1021/ol026199x]
[Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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.
Collapse