Tetrahedron

Zur theorie der α-ketosäuren: Beziehungen zwischen struktur und UV-Spektren von α-ketosäuren und verwandten α-dicarbonylverbindungen

G Fischer, G Oehme, A Schellenberger

Index: Fischer,G. et al. Tetrahedron, 1971 , vol. 27, p. 5683 - 5696

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Citation Number: 19

Abstract

In homopolar solvents α-keto acids form a stable proton chelate between the carboxyl and α- carbonyl groups. This chelate causes a major bathochrome shift of the n-π*-bands of the α- carbonyl group as compared to the spectrum of the non-chelated molecule, and moreover it shows a remarkable vibrational band structure. The UV spectra of α-keto acid amides also suggest an intramolecular-NH⋯ O C interaction. A study of the action of the alkyl group ...