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Updated: Jan 11, 2026
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Conformational constraint in natural product synthesis.
1Nagoya University.
Summary
This study introduces conformational constraint, a strategy for controlling reactant orientation in complex molecule synthesis. This approach enables efficient total synthesis of biologically active natural products.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
- Natural Product Synthesis
Background:
- Natural products with significant biological activity often feature complex molecular architectures, including caged frameworks, strained motifs, and numerous stereocenters.
- The total synthesis of these compounds demands sophisticated methodologies and strategic planning to meet stereochemical challenges.
Purpose of the Study:
- To establish and illustrate the concept of conformational constraint for stereocontrolled synthesis.
- To demonstrate the application of this concept in the total synthesis of complex natural products.
Main Methods:
- Utilizing factors like acyclic allyl strain, stereoelectronic effects, and chelation control to orient substrates.
- Employing heteroatom-directed conjugate addition for diastereoselective C-C bond formation.
- Applying cobalt acetylene chemistry for medium-sized ring construction and subsequent functionalization.
Main Results:
- Development of a stereocontrolled synthetic strategy based on conformational constraint.
- Successful application of the methodology in the total synthesis of complex natural products such as maytansine, okadaic acid, tautomycin, tetrodotoxin, and ciguatoxin.
Conclusions:
- The conformational constraint concept provides a powerful framework for achieving stereochemical control in complex molecule synthesis.
- This strategy significantly advances the total synthesis of challenging biologically active natural products.
Keywords:
C→O polarizationHADCA (heteroatom directed conjugate addition)acyclic allyl strainchelation controlconformational constraintstereoelectronic controlMore Related Videos
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