Synthesis and mass spectrometric fragmentation pattern of 6-(4-chlorophenyl)-N-aryl-4-(trichloromethyl)-4H-1,3,5-oxadiazin-2-amines

2018 ◽  
Vol 24 (5) ◽  
pp. 273-278 ◽  
Author(s):  
Pavlo V. Zadorozhnii ◽  
Vadym V. Kiselev ◽  
Ihor O. Pokotylo ◽  
Oxana V. Okhtina ◽  
Aleksandr V. Kharchenko
Keyword(s):  
Mass Spectra ◽  
Fast Atom Bombardment ◽  
Mass Spectrometric ◽  
Fragmentation Pattern ◽  
Mass Spectrometric Fragmentation

Abstract The mass spectrometric fragmentation of 6-(4-chlorophenyl)-N-aryl-4-(trichloromethyl)-4H-1,3,5-oxadiazin-2-amines was studied under fast-atom bombardment (FAB) conditions. To simplify the interpretation of the mass spectra, a number of new 4H-1,3,5-oxadiazine derivatives containing polyisotopic elements (Cl and Br) in the arylamine substituent were synthesized. It was shown that fragmentation occurs in two main patterns.

scholarly journals Breakdown of 3-(allylsulfonio)propanoates in bacteria from the Roseobacter group yields garlic oil constituents

2021 ◽  
Vol 17 ◽  
pp. 569-580
Author(s):  
Anuj Kumar Chhalodia ◽  
Jeroen S Dickschat
Keyword(s):  
Marine Bacteria ◽  
Dimethyl Sulfide ◽  
Mass Spectrometric ◽  
Fragmentation Pattern ◽  
Garlic Oil ◽  
Feeding Experiments ◽  
Sulfur Volatiles ◽  
Roseobacter Group ◽  
Mass Spectrometric Fragmentation ◽  
Substrate Tolerance

Two analogues of 3-(dimethylsulfonio)propanoate (DMSP), 3-(diallylsulfonio)propanoate (DAllSP), and 3-(allylmethylsulfonio)propanoate (AllMSP), were synthesized and fed to marine bacteria from the Roseobacter clade. These bacteria are able to degrade DMSP into dimethyl sulfide and methanethiol. The DMSP analogues were also degraded, resulting in the release of allylated sulfur volatiles known from garlic. For unknown compounds, structural suggestions were made based on their mass spectrometric fragmentation pattern and confirmed by the synthesis of reference compounds. The results of the feeding experiments allowed to conclude on the substrate tolerance of DMSP degrading enzymes in marine bacteria.

Gaschromatographisch-massenspektrometrische Analyse neutraler und saurer Oligosaccharide der Frauenmilch als Trimethylsilyläther / Gas Chromatographic Mass Spectrometric Analysis of Neutral and Acid Oligosaccharides from Human Milk as Their Trimethylsilyl Derivatives

1975 ◽  
Vol 30 (7-8) ◽  
pp. 451-459 ◽  
Author(s):  
Hubertus von Nicolai ◽  
Heinz Egge ◽  
Fritz Zilliken
Keyword(s):  
Human Milk ◽  
Mass Spectra ◽  
Mass Spectrometric ◽  
Spectrometric Analysis ◽  
Human Milk Oligosaccharides ◽  
Mass Spectrometric Fragmentation ◽  
Trimethylsilyl Derivatives ◽  
Gas Chromatographic Separation ◽  
Oligosaccharide Structures ◽  
Chromatographic Mass

Abstract Gas chromatography and the 20 eV mass spectra of the human milk oligosaccharides fucosido-galactose, fucosido-lactose, di-fucosido-lactose, 3'-N-acetylneuraminyl-lactose, 6'-N-acetylneuraminyl-lactose and of N-acetyllactosamine as pertrimethylsilyl (TMS) ethers are described. The gas chromatographic separation of the L-fucose containing oligosaccharides was performed on Silicone SE 30. The sialic acid containing sugars were separated on DEXSIL 300. The correlations between oligosaccharide structures and mass spectrometric fragmentation pat­ terns are discussed.

scholarly journals Structure proposal for a new pyoverdin from a ThaiPseudomonas putidastrain1

2004 ◽  
Vol 18 (3) ◽  
pp. 453-458 ◽  
Author(s):  
Chalerm Ruangviriyachai ◽  
Diana Uría Fernández ◽  
Mathias Schäfer ◽  
Herbert Budzikiewicz
Keyword(s):  
Amino Acids ◽  
Pseudomonas Putida ◽  
Primary Structure ◽  
Mass Spectrometric ◽  
Fragmentation Pattern ◽  
Mass Spectrometric Fragmentation

From a ThaiPseudomonas putidastrain a pyoverdin was isolated whose primary structure was deduced from its mass spectrometric fragmentation pattern. It belongs to the smallest representatives of this group of siderophores comprising only six amino acids.

scholarly journals Structure Proposal for a New Pyoverdin from Pseudomonas sp. PS 6.10

2006 ◽  
Vol 61 (11-12) ◽  
pp. 815-820 ◽  
Author(s):  
Herbert Budzikiewicz ◽  
Mathias Schäfer ◽  
Diana Uría Fernández ◽  
Jean-Marie Meyer
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Primary Structure ◽  
Minimal Medium ◽  
Mass Spectrometric ◽  
Casamino Acid ◽  
Fragmentation Pattern ◽  
Pseudomonas Sp ◽  
Mass Spectrometric Fragmentation ◽  
Biogenetic Precursor

Abstract From Pseudomonas sp. PS 6.10, when grown in a casamino acid medium, a pyoverdin was isolated whose primary structure could be deduced from its mass spectrometric fragmentation pattern and amino acid analysis. It belongs to the smallest representatives of this group of siderophores comprising only six amino acids in its peptide chain. When grown in a succinate minimal medium the corresponding ferribactin considered to be the biogenetic precursor of the pyoverdin was obtained as the major component.

Fast Atom Bombardment Mass Spectrometric Characterization of Poly(O-Toluidine)

1991 ◽  
Author(s):  
K. Balasaunmugam ◽  
K. G. Owens ◽  
K. F. Hsueh ◽  
P. Hoontrakul ◽  
M. A. Olsen
Keyword(s):  
Fast Atom Bombardment ◽  
Mass Spectrometric
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