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Conjugate reduction of vinyl bisphosphonates
Nyema M Harmon1, Nathaniel R Gehrke1, David F Wiemer1
1Department of Chemistry, The University of Iowa, Iowa City, IA 52242-1294, USA.
Researchers developed an efficient method for synthesizing monoalkyl geminal bisphosphonates using vinyl bisphosphonates. This approach, utilizing conjugate reduction, is effective even with complex molecules and allows for the creation of potential inhibitors of terpenoid biosynthesis.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
Background:
- Vinyl bisphosphonates are synthesized via condensation reactions.
- Monoalkyl geminal bisphosphonates are valuable pharmaceutical compounds.
Purpose of the Study:
- To develop an efficient synthetic route to monoalkyl geminal bisphosphonates.
- To explore the synthesis of isoprenoid-substituted triazole bisphosphonates as potential inhibitors of terpenoid biosynthesis.
Main Methods:
- Condensation of aromatic aldehydes with methylenebisphosphonate tetraesters to form vinyl bisphosphonates.
- Conjugate reduction of vinyl bisphosphonates using variations of the Stryker approach.
- Selective reduction in the presence of reducible aromatic substituents and remote olefins.
Main Results:
- An efficient method for preparing monoalkyl geminal bisphosphonates was established.
- The conjugate reduction method proved effective even with aromatic substituents.
- Remote olefins in isoprenoid chains remained unaffected during the reduction process.
Conclusions:
- The described reduction strategy provides access to monoalkyl geminal bisphosphonates.
- This method allows for the synthesis of isoprenoid-substituted triazole bisphosphonates.
- These compounds are of interest as potential inhibitors of terpenoid biosynthesis.
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