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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1002/mrc.2196
|2 doi
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|a eng
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|a Irvine, Nicholas M
|e verfasserin
|4 aut
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|a Characterization of two hydroxytrichloropicolinic acids
|b application of the one-bond chlorine-isotope effect in 13C NMR
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 20.05.2008
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|a Date Revised 08.04.2008
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a 2008 John Wiley & Sons, Ltd.
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|a The structures of 4-hydroxy-3,5,6-trichloropyridine-2-carboxylic acid (1a) and 6-hydroxy-3,4,5-trichloro-2-carboxylic acid (1b) were verified by the NMR analysis of their corresponding methylated and decarboxylated derivatives 2,3,5-trichloro-4-methoxypyridine (5) and 3,4,5-trichloro-2-methoxypyridine (8), respectively. The 6-hydroxy isomer (1a) was found to be in equilibrium with its pyridinone tautomer as evidenced by the formation of significant amounts of 3,4,5-trichloro-1-methyl-6-oxo-1,6-dihydropyridine-2-carboxylic acid methyl ester (6b) on exhaustive methylation. The one-bond chlorine-isotope effect was used and shown to be an effective tool for the identification of chlorinated carbons in (13)C NMR spectra providing an additional tool for solving structural problems in chlorinated compounds
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|a Journal Article
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|a Cooper, David H
|e verfasserin
|4 aut
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|a Thornburgh, Scott
|e verfasserin
|4 aut
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 46(2008), 5 vom: 01. Mai, Seite 436-40
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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|g volume:46
|g year:2008
|g number:5
|g day:01
|g month:05
|g pages:436-40
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|u http://dx.doi.org/10.1002/mrc.2196
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