Designer phytoalexins: probing camalexin detoxification pathways in the phytopathogen Rhizoctonia solaniElectronic supplementary information (ESI) available: 1H and 13C NMR spectral data for camalexin (1). See http://www.rsc.org/suppdata/ob/b4/b400031e/

2004 ◽  
Vol 2 (7) ◽  
pp. 1070 ◽  
Author(s):  
M. Soledade C. Pedras ◽  
Jun Liu
Keyword(s):  
Spectral Data ◽  
13C Nmr ◽  
Supplementary Information ◽  
1H And 13C Nmr ◽  
Detoxification Pathways

8-Acyl-7-phenylbicyclo[2.2.2]-2,6-diones by rearrangement of 3-acyloxy-5-(2-phenylethenyl)-2-cyclohexen-1-ones. 1H and 13C NMR spectral evidence of their structure

1990 ◽  
Vol 55 (5) ◽  
pp. 1208-1215 ◽  
Author(s):  
Pavel Hrnčiar ◽  
Tibor Liptay ◽  
Ján Šraga
Keyword(s):  
Double Bond ◽  
Spectral Data ◽  
13C Nmr ◽  
1H And 13C Nmr ◽  
Spectral Evidence ◽  
C Nmr

3-Acyloxy-5-(2-phenylethenyl)-2-cyclohexen-1-ones II were prepared by O-acylation of 5-(2-phenylethenyl)-1,3-cycloxanedione (I). Treatment of II with AlCl3 resulted in rearrangement of the acyl group to the double bond of the phenylethenyl grouping followed by cyclization to 8-acyl-7-phenylbicyclo[2.2.2]octane-2,6-diones III. Their structure was evidenced by analysis of the 1H and 13C NMR spectral data.

Engineered biosynthesis of novel spinosyns bearing altered deoxyhexose substituentsElectronic supplementary information (ESI) available: 1H and 13C NMR data for compounds 5–8. See http://www.rsc.org/suppdata/cc/b2/b200536k/

2002 ◽  
pp. 618-619 ◽  
Author(s):  
Sabine Gaisser ◽  
Christine J. Martin ◽  
Barrie Wilkinson ◽  
Rose M. Sheridan ◽  
Rachel E. Lill ◽  
...  
Keyword(s):  
13C Nmr ◽  
Supplementary Information ◽  
1H And 13C Nmr ◽  
Nmr Data

SYNTHESIS AND CHARACTERIZATION OF HETEROCYCLIC CHALCONES CONTAINING HALOGENATED THIOPHENES

2015 ◽  
Vol 77 (3) ◽  
Author(s):  
Helmi Mohammed Al-Maqtari ◽  
Joazaizulfazli Jamalis ◽  
Hasnah Mohd Sirat
Keyword(s):  
Sodium Hydroxide ◽  
Spectral Data ◽  
13C Nmr ◽  
Basic Medium ◽  
Synthesis And Characterization ◽  
Schmidt Reaction ◽  
Synthetic Compounds ◽  
1H And 13C Nmr ◽  
Heterocyclic Aldehydes

Heterocyclic chalcones containing halogenated thiophenes were synthesized. The first step was to synthesize 3-acetyl-2,5-dichlorothiophene and 2-acetyl-5-chlorothiophene as heterocyclic ketones by using Friedel-Crafts acylation. The ketones were then used to synthesize thiophene chalcones through Claisen-Schmidt reaction with the respective heterocyclic aldehydes such as 5-bromothiophene-2-carbaldehyde, 3-methyl-2-thiophene carboxaldehyde and 2-thiophene carboxaldehyde with 3-acetyl-2,5-dichlorothiophene or 2-acetyl-5-chlorothiophene in presence of basic medium, sodium hydroxide to form the corresponding chalcones. Structures of the synthetic compounds were confirmed by IR, MS, 1H and 13C NMR spectral data.

scholarly journals Reliability of 1H and 13C NMR spectral data - Chemical shift signal intensity.

Kobunshi ◽  
1987 ◽  
Vol 36 (6) ◽  
pp. 438-439
Author(s):  
Koichi Hatada
Keyword(s):  
Chemical Shift ◽  
Spectral Data ◽  
13C Nmr ◽  
Signal Intensity ◽  
1H And 13C Nmr

scholarly journals Flavonoids from flowers of Cephalaria pastricenis and their antiradical activity

2004 ◽  
Vol 69 (11) ◽  
pp. 883-886 ◽  
Author(s):  
Dejan Godjevac ◽  
Vlatka Vajs ◽  
Nebojsa Menkovic ◽  
Vele Tesevic ◽  
Pedja Janackovic ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Spectral Data ◽  
13C Nmr ◽  
Antiradical Activity ◽  
Flavonoid Glycosides ◽  
Dpph Assay ◽  
Endemic Plant ◽  
1H And 13C Nmr ◽  
Vis Spectroscopy ◽  
Endemic Plant Species

Two flavonoid glycosides 1 and 2 having the luteolin structure were isolated from flowers of the endemic plant species Cephalaria pastricensis. They were identified by 1H and 13C NMR, as well as UV/Vis spectroscopy. The structures of 1 and 2 were also confirmed by the spectral data of aglycones and TLC of the sugars obtained after acid hydrolysis. Flavones 1 and 2 showed significant antiradical activity in the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay.

scholarly journals Correlation analysis of IR, 1H and 13C NMR spectral data of N-alkyl and N-cycloalkyl cyanoacetamides

2011 ◽  
Vol 17 (3) ◽  
pp. 307-314 ◽  
Author(s):  
Aleksandar Marinkovic ◽  
Jelena Nedeljkovic ◽  
Dusan Mijin ◽  
Natasa Ilic ◽  
Slobodan Petrovic
Keyword(s):  
Spectral Data ◽  
13C Nmr ◽  
Ethyl Cyanoacetate ◽  
Substituent Effects ◽  
Alkyl Substituent ◽  
Steric Interaction ◽  
1H And 13C Nmr ◽  
Linear Free Energy ◽  
Energy Relationships ◽  
Reverse Substituent Effect

Linear free energy relationships (LFER) were applied to the IR, 1H and 13C NMR spectral data in Nalkyl and N-cycloalkyl cyanoacetamides. N-alkyl and N-cycloalkyl cyanocetamides were synthesized from corresponding amine and ethyl cyanoacetate. A number of substituents were employed for alkyl substitution, and fairly good correlations were obtained, using simple Hammett equation. In N-alkyl and N-cycloalkyl cyanoacetamides substituent cause SCS of N-H hydrogen primarily by steric interaction, polar subtituent effect influences SCS shift of C=O carbon, while steric effect of N-alkyl substituent causes IR stretching frequencies of N-H, C=O and CN group. The conformations of investigated compounds have been studied by the use of semiempirical PM6 method, and together with LFER analysis, give a better insight into the influence of such a structure on the transmission of electronic substituent effects. Negative ? values for several correlations (reverse substituent effect) were found.

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