Related Experiment Video
Updated: Apr 11, 2026
08:10
Fizzy Extraction of Volatile Organic Compounds Combined with Atmospheric Pressure Chemical Ionization Quadrupole Mass Spectrometry
Published on: July 14, 2017
8.1K
Total Synthesis of Limonin
Shuji Yamashita1, Akito Naruko2, Yuki Nakazawa2
1Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-aza aoba, Aoba-ku, Sendai 980-8578 (Japan). syamashita@fas.harvard.edu.
Angewandte Chemie (International Ed. in English)
|June 4, 2015
Summary
Researchers report the first total synthesis of (±)-limonin, a key limonoid. This achievement involved novel methods to construct the complex ring systems essential to limonoid structures.
Area of Science:
- Organic Chemistry
- Natural Product Synthesis
Background:
- Limonoids are a class of highly oxygenated C13α-triterpenes.
- Hundreds of limonoid congeners have been identified.
- Limonin is a prominent congener within this class.
Purpose of the Study:
- To achieve the first total synthesis of (±)-limonin.
- To develop novel synthetic strategies for constructing complex limonoid frameworks.
Main Methods:
- Tandem radical cyclization for BCD ring construction and C13α configuration.
- Robinson annulation to establish the androstane framework.
- Singlet-oxygen cycloaddition and Baeyer-Villiger oxidation for D-ring synthesis.
- Suárez reaction for the unique AA' ring system construction.
Main Results:
- Successful total synthesis of (±)-limonin.
- Demonstration of key stereochemical control for the C13α configuration.
- Efficient construction of the highly oxidized D-ring.
- Formation of the characteristic AA' ring system.
Conclusions:
- The reported synthesis provides a viable route to (±)-limonin.
- The synthetic methodology can be applied to other complex limonoids.
- This work advances the field of natural product synthesis.
