4.4 Article

N-Substituted and N-unsubstituted 1,3-Oxazolium-5-olates cycloaddition reactions with 3-substituted coumarins

Journal

TETRAHEDRON
Volume 66, Issue 14, Pages 2713-2717

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2010.02.009

Keywords

Mesoionic compounds; Coumarins; 1,3-Oxazolium-5-oxides; 1,3-Cycloaddition

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The 1,3-dipolar cycloaddition reaction of unsymmetrically N-substituted and N-unsubstituted 1,3-oxazolium-5-olates with selected 3-substituted coumarins has been examined Various types of pyrrole derivatives are isolated and their formation seems to be a function of the regio- and diastereochemistry of the initial cycloaddition step (C) 2010 Elsevier Ltd All rights reserved

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