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A ^(15)N NMR investigation of some azolopyridines

Stefaniak, L. and Roberts, John D. and Witanowski, M. and Hamdi, B. T. and Webb, G. A. (1984) A ^(15)N NMR investigation of some azolopyridines. Organic Magnetic Resonance, 22 (4). pp. 209-214. ISSN 0030-4921. http://resolver.caltech.edu/CaltechAUTHORS:20151002-123938320

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Abstract

^(15)N NMR chemical shift data are presented for 14 azolopyridines, together with the results of INDO/S-SOS calculations of nitrogen shieldings. Previous ^(14)N NMR results for some of these compounds are reinterpreted. The ^(14)N data and their assignments are shown to be reliable for the indolizine nitrogen atom from arguments based on relative line widths. The pyridine-type nitrogens are more reliably assigned from the ^(15)N spectra combined with the results of the INDO/S-SOS calculations for individual molecules. A combination of ^(14)N and ^(15)N NMR spectra, together with the shielding calculations, provides a basis for unambiguous assignments of all the various nitrogen environments considered.


Item Type:Article
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URLURL TypeDescription
http://dx.doi.org/10.1002/mrc.1270220403DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/mrc.1270220403/abstractPublisherArticle
Additional Information:© 1984 Wiley Heyden Ltd. Received 21 April 1983; accepted 15 August 1983. We gratefully acknowledge support from the SERC for use of the WM-180 spectrometer at PCMU, financial support under project number MR 1.9 from PAN and support from the Government of Iraq (B. T. Hamdi). The part of this research carried out at the California Institute of Technology was supported by the National Science Foundation and the Public Health Service, Research Grant No. GM 11072 from the Division of General Medical Sciences.
Funders:
Funding AgencyGrant Number
Science and Engineering Research Council (SERC)WM-180
Polish Academy of SciencesMR.I. 9
Government of Iraq UNSPECIFIED
NSFUNSPECIFIED
U.S. Public Health ServiceGM 11072
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Caltech Gates and Crellin Laboratories of Chemistry6810
Record Number:CaltechAUTHORS:20151002-123938320
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151002-123938320
Official Citation:Stefaniak, L., Roberts, J. D., Witanowski, M., Hamdi, B. T. and Webb, G. A. (1984), A 15N NMR investigation of some azolopyridines. Org. Magn. Reson., 22: 209–214. doi: 10.1002/mrc.1270220403
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ID Code:60721
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:02 Oct 2015 22:15
Last Modified:02 Oct 2015 22:15

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