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Total synthesis of herbimycin A
Kendra D Carter1, James S Panek
1Department of Chemistry and Center for Chemical Methodology and Library Development, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA.
Organic Letters
|January 3, 2004
Summary
This study details an enantioselective synthesis of Herbimycin A (HA), a potent Hsp90 inhibitor. The described method efficiently establishes key stereocenters for this important benzoquinoid ansamycin antibiotic.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
- Chemical Biology
Background:
- Herbimycin A (HA) is a benzoquinoid ansamycin antibiotic with demonstrated Hsp90 inhibitory activity.
- Hsp90 inhibitors are a significant class of therapeutic agents, particularly in oncology.
Purpose of the Study:
- To develop a novel enantioselective synthesis of Herbimycin A.
- To establish a reliable method for constructing the complex stereochemistry of HA.
Main Methods:
- Asymmetric syn-crotylation was employed to introduce stereocenters at C10, C11, C14, and C15.
- Brown's alpha-pinene-derived gamma-methoxy allylborane reagent was utilized for C6-C7 stereocenter formation.
- Diastereoselective hydroboration was used to establish the C12 stereocenter.
Main Results:
- Successful enantioselective synthesis of Herbimycin A was achieved.
- The synthetic route effectively controlled the formation of multiple stereocenters.
- The methodology provides a foundation for accessing HA analogs.
Conclusions:
- The developed synthetic strategy is effective for producing Herbimycin A.
- This work contributes to the field of ansamycin synthesis and Hsp90 inhibitor development.
- The synthesis paves the way for further exploration of Herbimycin A's biological potential.