Restricted rotation in chiral peptide nucleic acid (PNA) monomers--influence of substituents studied by means of 1H NMR.
NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2001;
20:1399-402. [PMID:
11563031 DOI:
10.1081/ncn-100002564]
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Abstract
The influence of amino acid side chains [derived from: Ala, Val, Leu, Ile, Phe, Tyr(Bzl), Ser(Bzl), Thr(Bzl), Pro, Trp], incorporated into "aminoalkyl" part of PNA monomers, on the temperature-dependent distributions of rotamers about the tertiary amide bond was studied by means of 1H NMR at 0, 25 and 40 degrees C in CDCl3. The delta G0 values of the energy differences between individual rotamers were calculated. The results may be helpful in the designing of monomers with desirable properties.
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