Characterization of the Hydrolysis Mechanism of Polyalternating Alginate in Weak Acid and Assignment of the Resulting MG-Oligosaccharides by NMR Spectroscopy and ESI−Mass Spectrometry

2006 ◽  
Vol 7 (7) ◽  
pp. 2108-2121 ◽  
Author(s):  
Synnøve Holtan ◽  
Qiujin Zhang ◽  
Wenche Iren Strand
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Weak Acid ◽  
Hydrolysis Mechanism ◽  
Esi Mass Spectrometry

Characterization of cyclodextrin complexes of camostat mesylate by ESI mass spectrometry and NMR spectroscopy

2009 ◽  
Vol 938 (1-3) ◽  
pp. 192-197 ◽  
Author(s):  
Soonho Kwon ◽  
Woonhyoung Lee ◽  
Hye-Jin Shin ◽  
Sung-il Yoon ◽  
Yun-tae Kim ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Cyclodextrin Complexes ◽  
Esi Mass Spectrometry

scholarly journals Synthesis and characterization of 2-pyridineformamide 3-pyrrolidinylthiosemicarbazone

2013 ◽  
Vol 29 ◽  
pp. 28-33
Author(s):  
B. Shakya ◽  
P. N. Yadav
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrum ◽  
Nmr Spectroscopy ◽  
13C Nmr Spectroscopy ◽  
Synthesis And Characterization ◽  
Ionization Mass ◽  
Transamination Reaction ◽  
Ionization Mass Spectrum ◽  
Esi Mass Spectrometry

Pyrrolidine-1-carbothiohydrazide was prepared by the transamination reaction of 4-methyl-4-phenyl-3-thiosemicarbazide with pyrrolidine in MeCN. 2-pyridineformamide 3-pyrrolidinyl-thiosemicarbazone (HAmPyrr) was synthesized by the reduction of cyanopyridine in the presence of pyrrolidine-1-carbothiohydrazide in MeOH with Na metal. The synthesized compound was characterized by elemental analysis, IR, 1H-NMR, 13C-NMR spectroscopy and ESI mass spectrometry. The prominent (M+1) peak (m/z) of HAmPyrr in the electron spray ionization mass spectrum was found at 250.09 which correspond to the molecular ion plus H. DOI: http://dx.doi.org/10.3126/jncs.v29i0.9234Journal of Nepal Chemical SocietyVol. 29, 2012Page: 28-33Uploaded date : 12/3/2013

scholarly journals (2S,3R,6R)-2-[(R)-1-Hydroxyallyl]-4,4-dimethoxy-6-methyltetrahydro-2H-pyran-3-ol

Molbank ◽  
10.3390/m1140 ◽  
2020 ◽  
Vol 2020 (2) ◽  
pp. M1140
Author(s):  
Jack Bennett ◽  
Paul Murphy
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
13C Nmr ◽  
Conjugate Addition ◽  
13C Nmr Spectroscopy ◽  
One Pot ◽  
1H And 13C Nmr ◽  
Esi Mass Spectrometry ◽  
The One

(2S,3R,6R)-2-[(R)-1-Hydroxyallyl]-4,4-dimethoxy-6-methyltetrahydro-2H-pyran-3-ol was isolated in 18% after treating the glucose derived (5R,6S,7R)-5,6,7-tris[(triethylsilyl)oxy]nona-1,8-dien-4-one with (1S)-(+)-10-camphorsulfonic acid (CSA). The one-pot formation of the title compound involved triethylsilyl (TES) removal, alkene isomerization, intramolecular conjugate addition and ketal formation. The compound was characterized by 1H and 13C NMR spectroscopy, ESI mass spectrometry and IR spectroscopy. NMR spectroscopy was used to establish the product structure, including the conformation of its tetrahydropyran ring.

scholarly journals Characterization of the synthetic cannabinoid MDMB-CHMCZCA

2016 ◽  
Vol 12 ◽  
pp. 2808-2815 ◽  
Author(s):  
Carina Weber ◽  
Stefan Pusch ◽  
Dieter Schollmeyer ◽  
Sascha Münster-Müller ◽  
Michael Pütz ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Hplc Method ◽  
Enantiomeric Purity ◽  
Synthetic Cannabinoid ◽  
Spectroscopic Techniques ◽  
Chiral Hplc ◽  
Tandem Mass ◽  
Synthetic Sample

The synthetic cannabinoid MDMB-CHMCZCA was characterized by various spectroscopic techniques including NMR spectroscopy and tandem mass spectrometry. The synthetic sample was found to be of S-configuration by VCD spectroscopy and comparison of the data with DFT calculations, while ECD spectroscopy was found to be inconclusive in this case. The enantiomeric purity of samples from test purchases and police seizures was assessed by a self-developed chiral HPLC method.

The Synthesis and Characterization of Nitrooxy- and Nitrosooxyborazine Compounds

2014 ◽  
Vol 69 (11-12) ◽  
pp. 1241-1247
Author(s):  
Thomas M. Klapötke ◽  
Magdalena Rusan
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Vibrational Spectroscopy ◽  
Elemental Analysis ◽  
Experimental Results ◽  
Synthesis And Characterization ◽  
The Impact

Abstract B-Nitrosooxypentamethylborazine, B-nitrooxypentamethylborazine and B-trinitrooxy-N-trimethylborazine have been synthesized and characterized by 1H, 13C, 11B, and 14N NMR spectroscopy, mass spectrometry, vibrational spectroscopy and elemental analysis. The 11B NMR shifts were calculated and compared to the experimental results. The decomposition temperatures and the impact and friction sensitivities of these compounds have been determined as well.

Synthesis and Characterization of Tetrakis(pentafluoroethyl)germane

Synthesis ◽  
2017 ◽  
Vol 49 (11) ◽  
pp. 2389-2393 ◽  
Author(s):  
Stefanie Pelzer ◽  
Beate Neumann ◽  
Hans-Georg Stammler ◽  
Nikolai Ignat’ev ◽  
Reint Eujen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Diffraction Analysis ◽  
Spectroscopic Characterization ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Comprehensive Characterization

This paper describes the synthesis and comprehensive characterization of tetrakis(pentafluoroethyl)germane. In addition to a complete NMR spectroscopic characterization, including the rarely used 73Ge NMR spectroscopy, Ge(C2F5)4 was studied by IR spectroscopy, mass spectrometry as well as X-ray diffraction analysis. A 73Ge NMR investigation as well as an X-ray diffraction study of the related germane Ge(CF3)4 are also included.

Flavour characterization of red wines by descriptive analysis and ESI mass spectrometry

2010 ◽  
Vol 21 (7) ◽  
pp. 755-762 ◽  
Author(s):  
Aline C.T. Biasoto ◽  
Rodrigo R. Catharino ◽  
Gustavo B. Sanvido ◽  
Marcos N. Eberlin ◽  
Maria Aparecida A.P. da Silva
Keyword(s):  
Mass Spectrometry ◽  
Descriptive Analysis ◽  
Red Wines ◽  
Esi Mass Spectrometry
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