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Digitale Medien

Conformer Equilibria in 2,4-Disubstituted Pentane Derivatives (1999)

Hoffmann, Reinhard W. ; Stenkamp, Dirk ; Trieselmann, Thomas ; [weitere]

Weinheim : Wiley-Blackwell

Liebigs Annalen 1999 (1999), S. 2915-2927

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Details

ISSN: 1434-193X

Schlagwort(e): Conformational analysis ; Conformational isomerism ; Isotopic labeling ; 2,4-Disubstituted pentanes ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: 2,4-Disubstituted pentanes are molecules which adopt essentially only two conformations. Substituents have been varied in order to find those which lead to a strong preference of the conformer equilibrium. Studying 2-substituted 4-methylpentanes 3 and 4-benzyloxypentanes 12, it has been shown that substituent effects on the conformer equilibria are not additive, as would be expected on the grounds of steric effects alone. Rather, interactions between polar groups reinforce the bias of the conformer equilibria. When applied to 2,4-disubstituted pentanes, substituents such as chloro or phthalimido shift the conformer equilibrium to the side of the gg conformer with preferences exceeding 90%.

Zusätzliches Material: 3 Tab.

Materialart: Digitale Medien

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