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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
A modular total synthesis of (±)-trigonoliimine C
B Narendraprasad Reddy1, Chepuri V Ramana
1Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411008, India. vr.chepuri@ncl.res.in.
Researchers achieved a total synthesis of trigonoliimine C using three catalytic steps. Key reactions involved gold-catalyzed addition and N-hydroxy reduction for efficient synthesis.
Area of Science:
- Organic Synthesis
- Medicinal Chemistry
- Catalysis
Background:
- Trigonoliimine C is a complex natural product with potential biological activity.
- Efficient synthetic routes are crucial for further investigation and analog development.
Purpose of the Study:
- To develop a convergent total synthesis of trigonoliimine C.
- To establish key catalytic transformations for constructing the molecule's core structure.
Main Methods:
- Employed a sequence of three catalytic transformations.
- Utilized a [Au]-catalyzed addition of protected tryptamine to isatogens.
- Developed a reduction of N-hydroxy to amine using hydrazine monohydrate.
Main Results:
- Successfully executed a convergent total synthesis of trigonoliimine C.
- Demonstrated the utility of gold catalysis in forming a key bond.
- Established an efficient method for the N-hydroxy to amine reduction.
Conclusions:
- The developed synthetic strategy provides a viable route to trigonoliimine C.
- The key catalytic reactions are applicable to the synthesis of related compounds.
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