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Search for "GC–MS analysis" in Full Text gives 85 result(s) in Beilstein Journal of Organic Chemistry.

Algicidal lactones from the marine Roseobacter clade bacterium Ruegeria pomeroyi

  • Ramona Riclea,
  • Julia Gleitzmann,
  • Hilke Bruns,
  • Corina Junker,
  • Barbara Schulz and
  • Jeroen S. Dickschat

Beilstein J. Org. Chem. 2012, 8, 941–950, doi:10.3762/bjoc.8.106

Graphical Abstract
  • material used for the synthesis, the solvent was not completely removed. The product (+)-11 was identical to racemic 11 by GCMS analysis (lit.: [α]D25 +91.5 (c 1.24, CHCl3), [34]). Compound 11 (6 mg) was dissolved in methanol (1 mL) and a small amount of Pd(OH)2 (ca. 1 mg, 10% Pd) was added. The catalytic
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Published 25 Jun 2012

Volatile organic compounds produced by the phytopathogenic bacterium Xanthomonas campestris pv. vesicatoria 85-10

  • Teresa Weise,
  • Marco Kai,
  • Anja Gummesson,
  • Armin Troeger,
  • Stephan von Reuß,
  • Silvia Piepenborn,
  • Francine Kosterka,
  • Martin Sklorz,
  • Ralf Zimmermann,
  • Wittko Francke and
  • Birgit Piechulla

Beilstein J. Org. Chem. 2012, 8, 579–596, doi:10.3762/bjoc.8.65

Graphical Abstract
  • volatiles of different Xanthomonas campestris species/isolates on Caenorhabditis elegans and on bacteria was also shown [20][37]. Volatile emissions of Xanthomonas campestris pv. vesicatoria 85-10 GC/MS analysis of volatiles released by X. c. pv. vesicatoria 85-10 The volatiles emitted by X. c. pv
  • is impossible. However, the tentative assignments of some volatiles are strongly supported by the results obtained during GC/MS analysis (Figure 2, Table 1). The intensive signal at m/z 157 may be attributed to the sum of decan-2-one (28), 7-methylnonan-2-one (25) and 8-methylnonan-2-one (24); that
  • day 3 on NBG), indicating that the same metabolic pathways were active and only larger quantities/fluxes of the volatiles were emitted under the four different growth conditions. Similarly, as performed with the GC/MS analysis, PTR–MS volatile profiles where obtained when X. c. pv. vesicatoria was
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Published 17 Apr 2012

Novel fatty acid methyl esters from the actinomycete Micromonospora aurantiaca

  • Jeroen S. Dickschat,
  • Hilke Bruns and
  • Ramona Riclea

Beilstein J. Org. Chem. 2011, 7, 1697–1712, doi:10.3762/bjoc.7.200

Graphical Abstract
  • comparison to library spectra and subsequent GCMS analysis of synthetic standards. Mass spectra of unbranched FAMEs (for mass spectrum of methyl dodecanoate see Figure 5A) are characterised by fragment ions at m/z = 74 (McLafferty rearrangement, Scheme 2), m/z = 87 (β-cleavage), and [M − 31]+ (loss of OMe
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Published 20 Dec 2011

Highly efficient cyclosarin degradation mediated by a β-cyclodextrin derivative containing an oxime-derived substituent

  • Michael Zengerle,
  • Florian Brandhuber,
  • Christian Schneider,
  • Franz Worek,
  • Georg Reiter and
  • Stefan Kubik

Beilstein J. Org. Chem. 2011, 7, 1543–1554, doi:10.3762/bjoc.7.182

Graphical Abstract
  • and subjected to GCMS analysis by using d11-GF (GF with a perdeuterated cyclohexyl residue) as the internal standard. The use of a chiral stationary phase allowed independent evaluation of the effect of the cyclodextrin on both GF enantiomers. The results of these measurements are shown in Figure 3
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Published 22 Nov 2011

A new phenylethyl alkyl amide from the Ambrostoma quadriimpressum Motschulsky

  • Guolei Zhao,
  • Chao Yang,
  • Bing Li and
  • Wujiong Xia

Beilstein J. Org. Chem. 2011, 7, 1342–1346, doi:10.3762/bjoc.7.158

Graphical Abstract
  • . Fraction 4 was further separated into seven fractions on a silica gel column (PE/AcOEt 10:1→1:1). GCMS analysis showed that fractions 4-4 and 4-5 included derivatives of a fatty acid amide. Fraction 4-5 was further purified by crystallization in diethyl ether to yield compound 1 (3 mg) as a white solid
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Published 29 Sep 2011

Meta-metallation of N,N-dimethylaniline: Contrasting direct sodium-mediated zincation with indirect sodiation-dialkylzinc co-complexation

  • David R. Armstrong,
  • Liam Balloch,
  • Eva Hevia,
  • Alan R. Kennedy,
  • Robert E. Mulvey,
  • Charles T. O'Hara and
  • Stuart D. Robertson

Beilstein J. Org. Chem. 2011, 7, 1234–1248, doi:10.3762/bjoc.7.144

Graphical Abstract
  • instrument at an operating frequency of 100.62 MHz. Elemental analyses were carried out on a Perkin-Elmer 2400 elemental analyser. Due to the extreme air and moisture sensitivity of 3, 4/5 and 6, ideal analyses could not be obtained. GCMS analysis was performed on an Agilent 7890A apparatus, GC with 5975C
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Published 06 Sep 2011

Evaluation of a commercial packed bed flow hydrogenator for reaction screening, optimization, and synthesis

  • Marian C. Bryan,
  • David Wernick,
  • Christopher D. Hein,
  • James V. Petersen,
  • John W. Eschelbach and
  • Elizabeth M. Doherty

Beilstein J. Org. Chem. 2011, 7, 1141–1149, doi:10.3762/bjoc.7.132

Graphical Abstract
  • 1.0 mL/min, at 30 °C, with 1.9 mL per injection and 10 mL product solution collected. The conversion was determined by GCMS analysis with decane as an internal standard; n = 5 unless otherwise indicated. Data represented in blue correspond to 0.50 M styrene in MeOH. Data represented in red correspond
  • injection, and 10 mL product solution collected. The conversion was determined by GCMS analysis with decane as an internal standard. Cartridge-to-cartridge variability of the substrate conversion based on the reduction of styrene to ethylbenzene. All reactions were carried out at 2.0 M in MeOH, at a flow
  • rate of 1.0 mL/min, at 30 °C, with 1.9 mL per injection, and 10 mL product solution collected; n = 3 experiments for each cartridge. The conversion was determined by GCMS analysis with decane as an internal standard. Commercial 10% Pd/C 30 mm CatCart® cartridges were used; numbers 1, 2, and 3 from lot
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Published 22 Aug 2011

Oxidative allylic rearrangement of cycloalkenols: Formal total synthesis of enantiomerically pure trisporic acid B

  • Silke Dubberke,
  • Muhammad Abbas and
  • Bernhard Westermann

Beilstein J. Org. Chem. 2011, 7, 421–425, doi:10.3762/bjoc.7.54

Graphical Abstract
  • = quadruplet). IR spectra were recorded with a Nicolet 510 FT-IR spectrometer, and GCMS analysis was performed with a Finnigan MAT Magnum System 240, Varian GC 3400 DB 5. Elemental analysis was carried out with a PerkinElmer elemental analysator 240 at the University of Paderborn, Germany. Methyl (−)-(1R)-1,3
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Published 11 Apr 2011

About the activity and selectivity of less well-known metathesis catalysts during ADMET polymerizations

  • Hatice Mutlu,
  • Lucas Montero de Espinosa,
  • Oĝuz Türünç and
  • Michael A. R. Meier

Beilstein J. Org. Chem. 2010, 6, 1149–1158, doi:10.3762/bjoc.6.131

Graphical Abstract
  • room temperature. The crude product was purified by precipitation into cold methanol. Final polymer molecular weights were determined after precipitation with the above mentioned GPC system. Transesterification of the obtained polymers (P1-P26) and GC-MS analysis The respective polymer (30 mg), excess
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Published 03 Dec 2010

Phase- vanishing halolactonization of neat substrates

  • Nicole Windmon and
  • Veljko Dragojlovic

Beilstein J. Org. Chem. 2008, 4, No. 29, doi:10.3762/bjoc.4.29

Graphical Abstract
  • apparently unstable. Thus, the corresponding iodolactone 5, along with a number of unidentified byproducts, was observed in GC-MS analysis of the reaction mixture. Isolation of the reaction product was not attempted. When iodine monochloride was used in place of iodine, the reaction was fast and the
  • one pair and 12.5 and 12.6 min for the other pair). Furthermore, GC-MS analysis indicated that the byproducts were the corresponding dibromo compounds. They were tentatively assigned structures 9–12. It was expected that one pair of the dibromo compounds (11 and 12) would form as exo-5-norbornene-2
  • GC-MS analysis). Thus, formation of dibromo products decreased compared to 4-pentenoic acid. Interestingly, no dibromo derivatives at all were observed in bromolactonizations of diacid 14 and diesters 17 and 20 (Table 1, entries 3, 6 and 8). Iodine monochloride also worked very well on the same
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Published 11 Aug 2008
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