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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1002/mrc.2210
|2 doi
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|a pubmed24n0594.xml
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|a DE-627
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|e rakwb
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|a eng
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|a Przybylski, Piotr
|e verfasserin
|4 aut
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|a CP/MAS spectroscopy in the determination of the tautomeric forms of gossypol, its Schiff bases and hydrazones in the solid state
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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
|b cr
|2 rdacarrier
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|a Date Completed 04.06.2008
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a Copyright (c) 2008 John Wiley & Sons, Ltd
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|a New Schiff bases and new hydrazones were synthesized and studied by (13)C and (15)N CP/MAS spectroscopy and by (1)H--(1)H COSY, (1)H--(13)C HMBC, (1)H--(13)C HSQC, (1)H--(15)N HMQC and (1)H--(15)N HSQC correlations. The CP/MAS investigation of gossypol has demonstrated that in the solid state it exists exclusively in the aldehyde-aldehyde tautomeric form. In contrast, CP/MAS studies of hydrazones and Schiff bases reveal that these compounds occur in the solid state in the N-imine-N-imine and enamine-enamine tautomeric forms, respectively. It is shown that the (13)C resonances of C-6, C-7 and C-11 carbon atoms are suitable for distinguishing between the tautomeric forms of aza-derivatives of gossypol in the solid state. Furthermore, we have proved that the (15)N CP/MAS spectra can be used to identify these tautomeric forms
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carbon Isotopes
|2 NLM
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|a Hydrazones
|2 NLM
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|a Nitrogen Isotopes
|2 NLM
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|a Powders
|2 NLM
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|a Schiff Bases
|2 NLM
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|a Gossypol
|2 NLM
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|a KAV15B369O
|2 NLM
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|a Schilf, Wojciech
|e verfasserin
|4 aut
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1 |
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|a Kamienski, Bohdan
|e verfasserin
|4 aut
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| 700 |
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|a Brzezinski, Bogumil
|e verfasserin
|4 aut
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| 700 |
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|a Bartl, Franz
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 46(2008), 6 vom: 15. Juni, Seite 534-44
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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| 773 |
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|g volume:46
|g year:2008
|g number:6
|g day:15
|g month:06
|g pages:534-44
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|u http://dx.doi.org/10.1002/mrc.2210
|3 Volltext
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