Jonghyeon Lee, Jooyeon Lee, Minwoo Kong, Jiwon Kang, Daeyeon Lee, Jeonghyo Lee*, Min Kim* and Houng Kang*,
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Naphthylpyridyl–Cu(II)-Catalyzed Oxidative Coupling of 2-Naphthylamines to Access BINAM Derivatives
In this study, we report the efficient synthesis of 1,1′-binaphthyl-2,2′-diamine (BINAM) derivatives via copper-catalyzed oxidative coupling of 2-aminonaphthalenes. The use of a ligand featuring an extended π system in combination with Cu(II) and molecular oxygen as the terminal oxidant enabled the formation of various BINAM derivatives in yields of up to 84%. Mechanistic investigations suggest a redox pathway involving Cu(II)/Cu(I) cycling, and π–π interactions between the ligand and substrate are proposed to stabilize reactive intermediates, thereby contributing to the observed efficiency.
期刊介绍:
Organic Letters invites original reports of fundamental research in all branches of the theory and practice of organic, physical organic, organometallic,medicinal, and bioorganic chemistry. Organic Letters provides rapid disclosure of the key elements of significant studies that are of interest to a large portion of the organic community. In selecting manuscripts for publication, the Editors place emphasis on the originality, quality and wide interest of the work. Authors should provide enough background information to place the new disclosure in context and to justify the rapid publication format. Back-to-back Letters will be considered. Full details should be reserved for an Article, which should appear in due course.