Journal
TETRAHEDRON LETTERS
Volume 55, Issue 4, Pages 777-783Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.12.026
Keywords
Carbenoid; Diazo compound; Zwitterionic intermediate; Trapping process; Enamine
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Zwitterionic intermediates generated from metal carbenoids and compounds containing enamine units belong to a class of highly active synthetic intermediates that undergo different types of transformations. They can undergo rapid proton transfer to afford C-H functionalization products, or undergo intramolecular trapping process to give [3+2] annulation products. Recently, by taking advantage of its unique electronic feature, novel transformations have been developed by applying suitable electrophiles to trap such type of zwitterionic intermediates. The successful trapping process offers a powerful strategy for the effective construction of diversified nitrogen-containing molecules. (C) 2013 Elsevier Ltd. All rights reserved.
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