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A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products

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A Divergent Approach to (+)-Habiterpenol and (-)-Corey's Protolimonoid.

Chirantan Singha¹, Prabhakar Singh¹, Arsheed Ahmad Bhat¹

¹Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India.

The Journal of Organic Chemistry

|June 3, 2026

Summary

A new enantioselective strategy enables efficient total synthesis of the meroterpenoid (+)-habiterpenol and formal synthesis of (-)-Corey

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Published on: May 15, 2019

Area of Science:

Organic Chemistry
Synthetic Chemistry
Natural Product Synthesis

Background:

Meroterpenoids and terpenoids are complex natural products with diverse biological activities.
Efficient synthetic routes are crucial for accessing these compounds and their analogs for further study.
Existing methods for synthesizing complex tetracyclic terpenoid structures can be lengthy and lack divergence.

Purpose of the Study:

To develop a concise and divergent enantioselective strategy for synthesizing (+)-habiterpenol and (-)-Corey's protolimonoid.
To establish a versatile tetracyclic intermediate for accessing complex meroterpenoid and terpenoid architectures.
To demonstrate the efficiency and flexibility of the developed synthetic platform.

Main Methods:

Iterative Robinson annulation to construct the tetracyclic core.
Late-stage aromatization involving formylation, Michael addition-aldol condensation, and copper-mediated oxidation.
Divergent synthesis from a common tetracyclic intermediate.

Main Results:

Total synthesis of (+)-habiterpenol in 10 steps.
Formal synthesis of (-)-Corey's protolimonoid in 7 steps.
Assembly of the A/B/C/D tetracyclic core in only 4 steps from a Hajos-Parrish ketone derivative.

Conclusions:

A flexible and efficient synthetic platform has been established for complex meroterpenoid and terpenoid synthesis.
The developed strategy offers a concise route to valuable natural products.
The common tetracyclic intermediate serves as a versatile building block for diverse molecular architectures.