Validation of the distal effect of electron-withdrawing groups on the stability of peptide enolates and its exploitation in the controlled stereochemical inversion of amino acid derivatives
Theoretical studies had predicted that N-electron-withdrawing substituents, hydrogen bonding, and protonation at amide nitrogen selectively increase the acidity of a distal proton adjacent to the amide carbonyl to the extent that the α-carbonyl acidity o
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|Source:||Journal of Organic Chemistry|
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