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Synthesis of Quaternary Amino Acids Bearing a (2'Z)-fluorovinyl Alpha-branch: Potential PLP Enzyme Inactivators

Overview
Journal Org Lett
Specialties Biochemistry
Chemistry
Date 2004 May 21
PMID 15151423
Citations 17
Authors
Affiliations
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Abstract

Protected alpha-formyl amino acids, themselves available from the corresponding alpha-vinyl amino acids, are stereoselectively transformed into the (Z)-configured alpha-(2'-fluoro)vinyl amino acids via a three-step sequence. The route employs McCarthy's reagent, diethyl alpha-fluoro-alpha-(phenylsulfonyl)methyl phosphonate, and proceeds via the intermediate (E)-alpha-fluorovinyl sulfones and (E)-alpha-fluorovinylstannanes. The latter may either be exploited as novel cross-coupling partners for fluorovinyl branch extension or be globally deprotected, to provide the title compounds. [structure: see text]

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