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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1002/mrc.2778
|2 doi
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|a pubmed24n0700.xml
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|a DE-627
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|a eng
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|a Furihata, Kazuo
|e verfasserin
|4 aut
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|a Selective J-resolved-HMQC-1 and -2, new methods for measuring proton-proton coupling constants in strongly coupled spin systems
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|c 2011
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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 21.05.2015
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|a Date Revised 03.11.2014
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Copyright © 2011 John Wiley & Sons, Ltd.
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|a Efficient pulse sequences for measuring (1)H-(1)H coupling constants (JHH) in strongly coupled spin systems, named selective J-resolved-HMQC-1 and -2, have been developed. In the strongly coupled spin systems such as -CH2-CHA(OH)-CHB(OH)-CH2-, measurements of (3)JHAHB are generally difficult owing to the complicated splitting caused by the adjacent CH2 protons. For easier and accurate measurements of (3)JHAHB in such a spin system, a selective excitation pulse is incorporated into the J-resolved HMQC pulse sequence. In the proposed methods, only two strongly coupled protons, HA and HB which are excited by a selective pulse, are observed as J-resolved HMQC signals. The cross peaks of HA and HB appear as doublets owing to (3)JHAHB along the F1 dimension in the selective J-resolved HMQC-1 and -2 experiments. The efficiency of the proposed pulse sequences has been demonstrated in application to the stereochemical studies of the complicated natural product, monazomycin
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|a Journal Article
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|a 1H-1H coupling constants
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|a J-scaling
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|a selective J-resolved-HMQC
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|a selective excitation
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|a strongly coupled spin systems
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|a Tashiro, Mitsuru
|e verfasserin
|4 aut
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 49(2011), 8 vom: 30. Aug., Seite 459-63
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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| 773 |
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|g volume:49
|g year:2011
|g number:8
|g day:30
|g month:08
|g pages:459-63
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|u http://dx.doi.org/10.1002/mrc.2778
|3 Volltext
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