4.4 Article

Palladium-catalyzed direct ortho C-X bond construction via C-H activation of azobenzenes: Synthesis of (E)-1,2-b(2,6-dibromo(chloro)-phenyl)diazene

Journal

TETRAHEDRON LETTERS
Volume 60, Issue 26, Pages 1715-1719

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2019.05.056

Keywords

C-H activation; (E)-1,2-Bis(2,6-dibromo-phenyl)diazene; (E)-1,2-Bis(2,6-dichloro-phenyl)diazene; Azobenzenes

Funding

  1. Shandong Provincial Natural Science Foundation [ZR2017LB006]

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A palladium-catalyzed direct C-X bond formation of azobenzenes with 1,3-dibromo-5,5-dimethylhydantoin or trichloro isocyanuric acid via C-H activation has been developed. The reaction could proceed smoothly under an air atmosphere at 110 degrees C in the presence of Pd(Ph3P)(4) in DCE and 13 examples of products were obtained. (C) 2019 Elsevier Ltd. All rights reserved.

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