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. https://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.
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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. | ||||||||||||
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Issue or Number: | 4 | ||||||||||||
Record Number: | CaltechAUTHORS:20151002-123938320 | ||||||||||||
Persistent URL: | https://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 | ||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
ID Code: | 60721 | ||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||
Deposited By: | Ruth Sustaita | ||||||||||||
Deposited On: | 02 Oct 2015 22:15 | ||||||||||||
Last Modified: | 03 Oct 2019 09:00 |
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