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Updated: May 20, 2026

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
Published on: February 7, 2019
1,2,4-trisubstituted cyclopentanes as platforms for diversity
Yousheng Guan1, Caterina Bissantz, Donald E Bergstrom
1Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University School of Pharmacy and Pharmaceutical Sciences, West Lafayette, IN, USA.
Researchers developed efficient synthetic methods to create diverse amino-, azido-, and hydroxy-substituted cyclopentanes from cyclopent-3-en-1-ol. Stereochemical control during epoxidation allows for versatile intermediate generation for complex molecule synthesis.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
Background:
- 1,2,4- and 1,3,4-substituted cyclopentanes are valuable scaffolds.
- Few synthetic routes exist for these substituted cyclopentanes.
Purpose of the Study:
- To develop efficient synthetic procedures for diverse amino-, azido-, and hydroxy-substituted cyclopentanes.
- To explore stereochemical control in the synthesis of these compounds.
Main Methods:
- Transformation of cyclopent-3-en-1-ol.
- Stereoselective epoxidation of the cyclopentene double bond.
- Differential protection strategies for intermediate functional groups.
Main Results:
- A variety of 1,2,4- and 1,3,4-substituted cyclopentanes were synthesized efficiently.
- Stereochemical outcomes of epoxidation were controlled by C4 substituents.
- Versatile intermediates with regiospecific control were generated.
Conclusions:
- Cyclopent-3-en-1-ol is a versatile starting material for substituted cyclopentanes.
- The developed methods offer efficient access to complex cyclopentane scaffolds.
- This work facilitates further elaboration of cyclopentane structures for various applications.
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