Accession Number : ADA212713

Title :   1H and 13C Nuclear Magnetic Resonance of Dihydroimidazo-Pyridine and Imidazo-(1,2-a)-Pyridine Derivatives.

Descriptive Note : Technical rept. Sep 86-Jun 88,

Corporate Author : CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD

Personal Author(s) : Munavalli, Shekhar ; Hsu, Fu-Lian ; Muller, August J ; Lewis, Everett O ; Beaudry, William T

PDF Url : ADA212713

Report Date : Jul 1989

Pagination or Media Count : 27

Abstract : Replacement of the aromatic hydrogens of the pyridinium moiety of the dihydroimidazopyridine and imidazo(1,2-a) -pyridine derivatives with electron-donating and electron-withdrawing substituents causes displacement of the chemical shifts of aromatic protons. Quaternization of the nitrogen atoms causes molecular perturbations and affects the 1H and 13C nuclear magnetic resonance chemical shifts. The sign of the C and C8a displacements can be used to detect the site of quaternization. Dihydroimidazo-pyridines, Imidazo-pyridines, Quaternization effects, Organic chemistry. (jes)

Descriptors :   *AROMATIC COMPOUNDS, ATOMS, CHEMICAL SHIFTS, DISPLACEMENT, HYDROGEN, MOLECULES, NITROGEN, ORGANIC CHEMISTRY, PERTURBATIONS, PROTONS

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE