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An unexpectedly facile cyclization of polyhydric alcohols
Christopher Pavlik1, Amber Onorato, Steve Castro
1Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, Connecticut 06269-3060, USA.
This study demonstrates that polyhydric alcohols like sorbitol react well to form tetrahydroxyoxepane derivatives. The reaction proceeds with excellent yields and complete stereochemical retention under specific acidic conditions.
Area of Science:
- Organic Chemistry
- Stereoselective Synthesis
Background:
- Previous literature reported challenges in synthesizing tetrahydroxyoxepane derivatives from polyhydric alcohols.
- The stereochemical outcome of such reactions was often problematic.
Purpose of the Study:
- To investigate an improved method for synthesizing tetrahydroxyoxepane derivatives.
- To achieve high yields and complete stereochemical retention in the reaction of polyhydric alcohols.
Main Methods:
- Reaction of polyhydric alcohols (sorbitol, mannitol) with an acid catalyst.
- Use of refluxing toluene as the reaction solvent.
- Analysis of reaction products for yield and stereochemistry.
Main Results:
- Achieved good yields of the target tetrahydroxyoxepane derivative.
- Demonstrated complete retention of stereochemistry, contrary to prior reports.
- Optimized reaction conditions using acid catalysis in refluxing toluene.
Conclusions:
- The described method provides an efficient route to tetrahydroxyoxepane derivatives.
- This approach overcomes previous limitations regarding yield and stereochemical control.
- The findings offer a valuable synthetic strategy for related carbohydrate derivatives.
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