A simple 1H nmr conformational study of some heterocyclic azomethines
نویسندگان
چکیده
منابع مشابه
Conformational Study of some novel Methoxy Half-Analogues of Michler’s Ketone by NMR
One series of half-analogues of Michler’s ketone containing one or more terminal methoxysubstituents with variable tertiary amino groups have been used in this study. NMR spectralresults for the parent ketones confirm earlier findings that ortho proton shifts are apparentlyindependent from steric effects in derivatives of Michler’s ketone because the ring current andcarbonyl-induced shifts are ...
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The aim of the present paper is to extend our studies over some new derivatives of sulfonamidated aryloxyalkylcarboxilic acids as a class of a particularly high biological potential. In recent years the corresponding hydrazides of these acids and their condensation products, alhylhydrazones, were much attention paid to in virtue of their potential biological action. The synthesis stages of the ...
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A search procedure is described for making stereospecific assignments at prochiral centers in proteins on the basis of nuclear Overhauser enhancement and coupling constant data derived from nmr experiments. A data base comprising torsion angles, associated 1H-1H coupling constants and interproton distances is searched by a computer algorithm for sets of values that match the experimental data w...
متن کاملconformational study of some novel methoxy half-analogues of michler’s ketone by nmr
one series of half-analogues of michler’s ketone containing one or more terminal methoxysubstituents with variable tertiary amino groups have been used in this study. nmr spectralresults for the parent ketones confirm earlier findings that ortho proton shifts are apparentlyindependent from steric effects in derivatives of michler’s ketone because the ring current andcarbonyl-induced shifts are ...
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The proton magnetic resonance spectra of someerythromycin aglycones have been investigated at 100 MHzin both deuteriochloroform and pyridine-d5 solvents. Utilizing information derived from pyridine solvent J-values (J= £CDC13-£C5D5N) and spin-spin coupling constants for vicinal protons, the preferred approximate conformations of these 14-membered lactone ring systems in solution have been shown...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1981
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v81-175