Conformational analysis of (R,S)-4-amido-2,4-dimethyl-butyric acid derivatives
摘要:
NMR spectra of various N-acyl derivatives of (R,S)-4-amino-2,4-dimethyl-butyric acid show these compounds to be biconformational, populating the conformers 4 and 5 of the molecular backbone. Both predominant conformers have the amide group gauche to the main chain, (C) 1999 Elsevier Science Ltd. All rights reserved.
Conformational analysis of (R,S)-4-amido-2,4-dimethyl-butyric acid derivatives
作者:Reinhard W. Hoffmann、Miguel A. Lazaro、Francisco Caturla、Eric Framery、Ingrid Valancogne、Christian A.G.N. Montalbetti
DOI:10.1016/s0040-4039(99)01226-5
日期:1999.8
NMR spectra of various N-acyl derivatives of (R,S)-4-amino-2,4-dimethyl-butyric acid show these compounds to be biconformational, populating the conformers 4 and 5 of the molecular backbone. Both predominant conformers have the amide group gauche to the main chain, (C) 1999 Elsevier Science Ltd. All rights reserved.
Conformational analysis of 4-amido-2,4-dimethylbutyric acid derivatives
作者:Reinhard W. Hoffmann、Francisco Caturla、Miguel A. Lazaro、Eric Framery、M. Carmen Bernabeu、Ingrid Valancogne、Christian A. G. N. Montalbetti
DOI:10.1039/a910179i
日期:——
Both syn- and anti-4-amido-2,4-dimethylbutyric acid derivatives 5 and 6 were found to populate a conformation in
which the amido group is gauche to the main chain of the molecule. In the anti series (6) a single conformation
predominates, in which the acid carbonyl group is also gauche
to the main chain. In the syn series (5) two local conformers prevail about the C-2–C-3 bond.