A Highly Stereospecific Claisen-Sakurai Approach to Densely Functionalized Cyclopentenols
Ksenia S Stankevich1, Matthew J Cook1
1Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States.
Abstract:
The formation of highly substituted cyclopentenols was developed using a Claisen-Sakurai reaction. Both elements of the reaction can be performed in a one-pot sequence that provides the corresponding cyclized products in high stereoselectivity. The stereochemical outcome is defined by a combination of Claisen stereospecificity and stereoelectronic effects in the Sakurai cyclization that promotes reactivity via an anti-SE' antiperiplanar transition state. This was determined by examination of the product stereochemistry and through detailed DFT analysis.
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