The understanding of normal cognitive function and the development of treatments for neurodegenerative diseases have been enabled by the study of natural products and their synthetic congeners. The extensive discoveries made in this realm have been limited primarily to the specific activities of abundantly available natural products or simple derivatives thereof. The long-term goal of this proposal is to use fragment-coupling approaches to synthesize varied, stereochemically rich, polycyclic natural product architectures with the potential to further the understanding of neurodegenerative disorders. This proposal outlines two convergent approaches for the synthesis of two families of natural products, the grayanotoxins and the limonoids, both of which have been shown to attenuate neuronal cell death caused by reactive oxygen species. By departing from conventional strategies that cyclize linear precursors, this proposal utilizes the convergent and scalable assembly of building blocks into structurally differentiated scaffolds. In line with conventional approaches, the molecular architectures obtained through this approach will be subsequently modified through the application of a dehydrogenation methodology recently reported by our laboratory, as well as by other chemical strategies. Novel analogs produced by these routes will be evaluated for their ability to alleviate the effects of reactive oxygen species on neurodegeneration. Through increased understanding of neurodegeneration on a molecular level, potential avenues for drug discovery and therapeutic intervention will be revealed.

Public Health Relevance

The aging population in the United States considerably exacerbates the economic and societal impacts of neurodegenerative disorders, which are among the leading causes of disability in the elderly. Advances in the drug discovery process, including in this area, have been enabled by the development of chemical routes to therapeutics based on natural products. The proposed research will focus on the development of synthetic routes to structurally complex natural products that have been shown to diminish the production of reactive oxygen species that are implicated in neurological disease.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM118614-04
Application #
9930093
Study Section
Synthetic and Biological Chemistry B Study Section (SBCB)
Program Officer
Brown, Patrick
Project Start
2017-09-01
Project End
2022-05-31
Budget Start
2020-06-01
Budget End
2021-05-31
Support Year
4
Fiscal Year
2020
Total Cost
Indirect Cost
Name
Yale University
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
043207562
City
New Haven
State
CT
Country
United States
Zip Code
06520
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Schuppe, Alexander W; Newhouse, Timothy R (2017) Assembly of the Limonoid Architecture by a Divergent Approach: Total Synthesis of (±)-Andirolide N via (±)-8?-Hydroxycarapin. J Am Chem Soc 139:631-634
Huang, David; Schuppe, Alexander W; Liang, Michael Z et al. (2016) Scalable procedure for the fragmentation of hydroperoxides mediated by copper and iron tetrafluoroborate salts. Org Biomol Chem 14:6197-200