Grimmer CD, Slabber CA. Conformational analysis: ³JHCOC and ³JHCCC Karplus relationships for methylene ¹H nuclei.
MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015;
53:590-595. [PMID:
26017915 DOI:
10.1002/mrc.4264]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 04/26/2015] [Accepted: 04/28/2015] [Indexed: 06/04/2023]
Abstract
NAMFIS (NMR Analysis of Molecular Flexibility In Solution) was applied to 1-[2-(benzyloxy)phenyl]ethanone using quantitative (1)H-(1)H NOE distances and (3)J proton-carbon coupling constant (CC) restraints for averaged methylene proton (3)J(HCOC) and (3)J(HCCC) pathways H2-(3)J-X imposed by density functional theory-generated Karplus relationships. Comparison of the NOE-only versus the NOE + CC conformational selections illustrates that the experimentally measured average (3)J coupling constants of methylene protons can be used for solution conformational analysis, potentially valuable in the study of small-molecule drugs and natural products which lack the typically studied H1-(3)J-X Karplus relationships.
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