The majority of pharmaceutical drugs that are essential for human health consist of nitrogen containing compounds. A particularly attractive approach to these targets is the modification of cheap and readily available amines by means of C-H bond functionalization. However, methods that accomplish this task efficiently are scarce and severely lacking in scope. Moreover, the currently known approaches typically require the use of expensive transition metal catalysts and/or oxidants. This proposal is focused on the design and development of efficient and practical methods for amine functionalization. The main goal is the ?- and ?-functionalization of amines through conceptually new and underdeveloped methods of substrate activation. A major focus is on redox-neutral approaches to C-H bond functionalization that do not require expensive oxidants or precious metal catalysts. The central theme of our proposed work is to couple an oxidative C-H bond functionalization with a productive reduction event that contributes to the formation of products by allowing for the generation of additional C-C, or C-X bonds. Our proposed reactions proceed via iminium ion, azomethine ylide and enamine intermediates that can be accessed under relatively mild conditions. In addition to targeting the rapid preparation of biologically active compounds such as epiquinamide, harmicine and quinazolinone alkaloids, our efforts will center on the development of particularly powerful reactions that rapidly generate new polycylic amines. A priority is the generation of novel structural frameworks that are absent from current drug discovery screening libraries.

Public Health Relevance

As most pharmaceutical drugs contain nitrogen, the ability to prepare these materials in the most rapid way possible is of the utmost importance. The broad availability of drugs is directly dependent on the existence of cost-efficient methods that can reliably build complex molecular structures. The objective of this proposal is the development of powerful new methods and strategies for amine C-H bond functionalization that will facilitate rapid access to valuable building blocks for the synthesis of biologically active compounds and pharmaceuticals.

National Institute of Health (NIH)
National Institute of General Medical Sciences (NIGMS)
Research Project (R01)
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Synthetic and Biological Chemistry B Study Section (SBCB)
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Lees, Robert G
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Rutgers University
Schools of Arts and Sciences
New Brunswick
United States
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Min, Chang; Sanchawala, Abbas; Seidel, Daniel (2014) Dual C-H functionalization of N-aryl amines: synthesis of polycyclic amines via an oxidative Povarov approach. Org Lett 16:2756-9
Seidel, Daniel (2014) The Redox-A(3) Reaction. Org Chem Front 1:426-429
Chen, Weijie; Seidel, Daniel (2014) The redox-Mannich reaction. Org Lett 16:3158-61
Chen, Weijie; Wilde, Richard G; Seidel, Daniel (2014) Redox-neutral *-arylation of amines. Org Lett 16:730-2
Richers, Matthew T; Breugst, Martin; Platonova, Alena Yu et al. (2014) Redox-neutral ?-oxygenation of amines: reaction development and elucidation of the mechanism. J Am Chem Soc 136:6123-35
Chen, Weijie; Kang, YoungKu; Wilde, Richard G et al. (2014) Redox-neutral ?,?-difunctionalization of cyclic amines. Angew Chem Int Ed Engl 53:5179-82
Jarvis, Claire L; Richers, Matthew T; Breugst, Martin et al. (2014) Redox-neutral ?-sulfenylation of secondary amines: ring-fused N,S-acetals. Org Lett 16:3556-9
Das, Deepankar; Sun, Aaron X; Seidel, Daniel (2013) Redox-neutral copper(II) carboxylate catalyzed ?-alkynylation of amines. Angew Chem Int Ed Engl 52:3765-9
Richers, Matthew T; Deb, Indubhusan; Platonova, Alena Yu et al. (2013) Facile Access to Ring-Fused Aminals via Direct *-Amination of Secondary Amines with ortho-Aminobenzaldehydes. Synthesis of Vasicine, Deoxyvasicine, Deoxyvasicinone, Mackinazolinone and Ruteacarpine. Synthesis (Stuttg) 45:1430-1748
Das, Deepankar; Seidel, Daniel (2013) Redox-neutral *-C-H bond functionalization of secondary amines with concurrent C-P bond formation/N-alkylation. Org Lett 15:4358-61

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