Synthesis of phenyl-substituted 2H,5H-pyrano[4,3-b]pyran-5-ones and related heterocycles via a domino knoevenagel condensation/6π-electron electrocyclization of 4-hydroxy-6-phenyl-2H-pyran-2-one with cyclic and acylic α,β-unsaturated aldehy

Publication Type
Journal contribution (peer reviewed)
Authors
Leutbecher, H.; Rieg, S.; Conrad, J.; Mika, S.; Klaiber, I.; Beifuss, U.
Year of publication
2009
Published in
Z. Naturforsch.
Band/Volume
64b/8
DOI
10.1002/chin.201001147
Page (from - to)
935-944
Abstract

 A range of new 7-phenyl-2H,5H-pyrano[4,3-b]pyran-5-ones and related tricyclic heterocycles was prepared in a single step by means of a domino Knoevenagel condensation/6π-electron electrocyclization under different reaction conditions, including thermal and microwave conditions. The influence of several ionic liquids as solvents was also studied.

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