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Oleraciamides A and B: Confirmation and Revision of Structures
Sai Kiran Kunuru1, Laxman D Nandawadekar1,2, Mikhail E Elyashberg3
1Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, India.
Journal of Natural Products
|July 2, 2026
Summary
The structures of oleraciamide A and B were investigated using computational methods and synthesis. Oleraciamide B
Area of Science:
- Natural Product Chemistry
- Organic Synthesis
- Computational Chemistry
Background:
- Oleraciamides are natural products with potential biological activities.
- Previous structural assignments require verification.
Purpose of the Study:
- To confirm the structure of oleraciamide A.
- To correct and confirm the structure of oleraciamide B.
Main Methods:
- Computational chemistry methods (e.g., NMR prediction, DFT calculations).
- Total synthesis of oleraciamide A and B.
- Spectroscopic analysis (NMR, MS).
- Comparison with authentic samples.
Main Results:
- The proposed structure of oleraciamide A was confirmed.
- The structure of oleraciamide B was found to be incorrect.
- Oleraciamide B was reassigned as an amine N-oxide.
- The reassigned structure of oleraciamide B was confirmed via total synthesis and comparison with authentic material.
Conclusions:
- The structural elucidation of oleraciamides A and B has been definitively established.
- This study corrects a previous structural assignment for oleraciamide B.
- The synthetic routes provide access to authentic standards for future biological studies.
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