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Synlett 2013; 24(7): 865-867
DOI: 10.1055/s-0032-1318487
DOI: 10.1055/s-0032-1318487
letter
Triflic Acid Mediated Fries Rearrangement of 3-Dienyl-2-azetidinones: Facile Synthesis of 3-(But-2-enylidene)quinolin-4(3H)-ones
Further Information
Publication History
Received: 24 January 2013
Accepted after revision: 28 February 2013
Publication Date:
08 March 2013 (online)


Abstract
β-Lactam-synthon-interceded synthesis of 3-(but-2-enylidene)quinolin-4(3H)-ones has been described via triflic acid mediated Fries rearrangement of 3-butadienyl-2-azetidinones. The described protocol provides a direct access to C-3 functionalized quinolin-4(3H)-ones and does not suffer from the disadvantages associated with conventional routes.