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Palladium(II)-Catalyzed Regioselective Ortho Arylation of sp2 C[BOND]H Bonds of N-Aryl-2-amino Pyridine Derivatives

Authors

  • Dr. Moumita Koley,

    1. Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-OC, 1060 Vienna (Austria), Fax: (+43) 1-58801-9163616
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  • Navid Dastbaravardeh,

    1. Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-OC, 1060 Vienna (Austria), Fax: (+43) 1-58801-9163616
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  • Dr. Michael Schnürch,

    Corresponding author
    1. Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-OC, 1060 Vienna (Austria), Fax: (+43) 1-58801-9163616
    • Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-OC, 1060 Vienna (Austria), Fax: (+43) 1-58801-9163616
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  • Prof. Dr. Marko D. Mihovilovic

    1. Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-OC, 1060 Vienna (Austria), Fax: (+43) 1-58801-9163616
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Errata

This article is corrected by:

  1. Errata: Corrigendum: Palladium(II)-Catalyzed Regioselective Ortho Arylation of sp2 C[BOND]H Bonds of N-Aryl-2-amino Pyridine Derivatives Volume 4, Issue 11, 1696, Article first published online: 26 September 2012

Abstract

The direct arylation of N-(2-pyridyl) substituted anilines is described. Arylation takes place in ortho position to the amine functionality and is directed by the pyridine N-substituent. Remarkably, N-arylation was never observed as a competing process even though conditions also suitable for Buchwald–Hartwig reactions were applied. The scope of the reaction was investigated in terms of aryl donors as well as the electronic nature of the substrate. Good yields were obtained for most examples through an operationally simple procedure, which did not require inert conditions or even glove box techniques. Pd(OAc)2 was applied as a cheap catalyst and boronic acids as readily available aryl donors. To obtain full conversion, 1,4-benzoquinone and a silver salt (e.g., Ag2O) were required as additives and reacted at relatively mild temperatures (e.g., 80 °C). Additionally, the pyridine-directing group was cleaved after the reaction to give ortho-arylated aniline derivatives.

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