The total synthesis of natural products drives the discovery of new therapeutics by inspiring innovation in synthetic methods. The methods that have been investigated and perfected since the nineteenth century are utilized daily in the synthesis of medically relevant small molecules. This research proposal describes a natural product synthesis project that relies on the development of the surrounding synthetic methodology. Specifically, the proposal outlines a synthetic route to two natural products in the dhilirolide family, dhilirolide M and L. These compounds are meroterpenoids, which are mixed polyketide-terpenoid natural products that are produced by filamentous fungi and contain unprecedented structural motifs. Dhilirolides have strong activity against Trichoplusia ni, a significant agricultural pest. This work will expand on the scope of an asymmetric allylic alkylation reaction developed by the Stoltz group.
The specific aims are: 1) Expansion of the asymmetric allylic alkylation methodology to include chiral alcohol-containing allyl carbonates, 2) Total synthesis of Dhilirolide L; Construction of the 6-5-5 bridged core, and 3) Total synthesis of Dhilirolide L; Intramolecular Diels-Alder reaction and final modifications. Ultimately, the development of these techniques will culminate in the synthesis of this natural product and represent a route to similar structures.

Public Health Relevance

At the core of chemistry rests the power to manipulate the elements for the preparation of specific arrays of atoms in a predictable and reliable fashion. As synthetic chemists, our capacity to construct molecules with exquisite precision is unique in the sciences. In this proposal, we outline a number of new approaches toward constructing important linkages and implementing these methods in highly complex situations of relevance to human medicine.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32GM116304-02
Application #
9187786
Study Section
Special Emphasis Panel (ZRG1)
Program Officer
Barski, Oleg
Project Start
2015-07-01
Project End
2016-11-02
Budget Start
2016-07-01
Budget End
2016-11-02
Support Year
2
Fiscal Year
2016
Total Cost
Indirect Cost
Name
California Institute of Technology
Department
Type
Schools of Arts and Sciences
DUNS #
009584210
City
Pasadena
State
CA
Country
United States
Zip Code
91125
Starkov, Pavel; Moore, Jared T; Duquette, Douglas C et al. (2017) Enantioselective Construction of Acyclic Quaternary Carbon Stereocenters: Palladium-Catalyzed Decarboxylative Allylic Alkylation of Fully Substituted Amide Enolates. J Am Chem Soc 139:9615-9620
Mohr, Justin T; Moore, Jared T; Stoltz, Brian M (2016) Enantioconvergent catalysis. Beilstein J Org Chem 12:2038-2045