Journal
TETRAHEDRON
Volume 67, Issue 42, Pages 8086-8091Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2011.08.067
Keywords
Multicomponent reactions; Alkynes; Sulfonyl azides; Hydrozones; Pyrazoles; Electrocyclic reactions
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Funding
- National Nature Science Foundation of China [21032005, 20872128]
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5-Sulfonamidopyrazoles were efficiently synthesized from terminal alkynes, sulfonyl azides and hydrozones. The sequential reaction involves a copper-catalyzed three-component reaction, a Lewis acid-catalyzed electrocyclic reaction and a dehydrogenation. (C) 2011 Elsevier Ltd. All rights reserved.
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