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Search for "electrospray" in Full Text gives 183 result(s) in Beilstein Journal of Organic Chemistry.

Molecular recognition of organic ammonium ions in solution using synthetic receptors

  • Andreas Späth and
  • Burkhard König

Beilstein J. Org. Chem. 2010, 6, No. 32, doi:10.3762/bjoc.6.32

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Published 06 Apr 2010

Templated versus non-templated synthesis of benzo-21-crown-7 and the influence of substituents on its complexing properties

  • Wei Jiang and
  • Christoph A. Schalley

Beilstein J. Org. Chem. 2010, 6, No. 14, doi:10.3762/bjoc.6.14

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  • coupling constants (J) are in Hertz. The following abbreviations were used for signal multiplicities: s, singlet; d, doublet; t triplet; m, multiplet. Electrospray-ionization time-of-flight high-resolution mass spectrometry (ESI-TOF-HRMS) experiments were conducted on an Agilent 6210 ESI-TOF, Agilent
  • Technologies and a Varian/IonSpec QFT-7 FTICR (Fourier-transform ion-cyclotron-resonance) mass spectrometer equipped with a superconducting 7 Tesla magnet and a micromass Z-spray Electrospray-ionization (ESI) ion source utilizing a stainless steel capillary with a 0.75 mm inner diameter. 2-{2-[2-(2-{2-[2-(2
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Published 11 Feb 2010

Synthesis of phosphonate and phostone analogues of ribose-1-phosphates

  • Pitak Nasomjai,
  • David O'Hagan and
  • Alexandra M. Z. Slawin

Beilstein J. Org. Chem. 2009, 5, No. 37, doi:10.3762/bjoc.5.37

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  • . Infra red (IR) spectra were recorded on Nicolet Avatar 360 FT-IR. High resolution mass spectrometry (HRMS) was carried out using a Micromass LCT (Manchester, UK) mass spectrometer with electrospray ionization (ESI) operating in positive and negative modes. Optical rotations were measured on Perkin-Elmer
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Published 27 Jul 2009

Synthesis of rigidified flavin–guanidinium ion conjugates and investigation of their photocatalytic properties

  • Harald Schmaderer,
  • Mouchumi Bhuyan and
  • Burkhard König

Beilstein J. Org. Chem. 2009, 5, No. 26, doi:10.3762/bjoc.5.26

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  • 35–70 μm, 60 Å from Acros. NMR spectra were recorded at a Bruker Avance 300 spectrometer (300 MHz) or at a Bruker Avance 600 spectrometer (600 MHz). Electrospray ionisation (ES-MS) mass spectra were measured on ThermoQuest Finnigan TSQ 7000 spectrometer. High resolution mass spectrometry (HRMS) was
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Published 28 May 2009

Synthesis of methylenebisamides using CC- or DCMT- activated DMSO

  • Qiang Wang,
  • Lili Sun,
  • Yu Jiang and
  • Chunbao Li

Beilstein J. Org. Chem. 2008, 4, No. 51, doi:10.3762/bjoc.4.51

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  • DMSO-d6 or CDCl3 (13C). Mass spectra were obtained using an LCQ Advantage MAX ion trap mass spectrometer equipped with electrospray ionization (ESI) ion source or a Thermo Finnigan TRACE-DSQ spectrometer. Elemental analyses for C, H and N were performed on a Yanaco CHNCORNER MF-3 elemental analyzer
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Published 15 Dec 2008

Synthesis of imidazol- 1-yl-acetic acid hydrochloride: A key intermediate for zoledronic acid

  • Santosh Kumar Singh,
  • Narendra Manne,
  • Purna Chandra Ray and
  • Manojit Pal

Beilstein J. Org. Chem. 2008, 4, No. 42, doi:10.3762/bjoc.4.42

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  • Avance 300 spectrometer (300 MHz). Electrospray (ES+) mass spectra were acquired on an ion trap mass spectrometer. Preparation of imidazol-1-yl-acetic acid tert-butyl ester (2) To a solution of imidazole (10.0 g, 0.15 mol) in ethyl acetate (160 mL) was added powdered K2CO3 (29.0 g, 0.21 mol) followed by
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Published 17 Nov 2008

The first preparative solution phase synthesis of melanotan II

  • Vladimir V. Ryakhovsky,
  • Georgy A. Khachiyan,
  • Nina F. Kosovova,
  • Elena F. Isamiddinova and
  • Andrey S. Ivanov

Beilstein J. Org. Chem. 2008, 4, No. 39, doi:10.3762/bjoc.4.39

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  • synthesized product and melanotan II purchased from a commercial source. Electrospray injection mass spectrometry of both samples demonstrated two characteristic peaks with m/z 512 and 1024, corresponding to [M+2H]2+ and [M+H]+ respectively. Conclusion In conclusion, we have developed the first solution phase
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Published 30 Oct 2008

Synthesis of (S)-1-(2-chloroacetyl)pyrrolidine- 2-carbonitrile: A key intermediate for dipeptidyl peptidase IV inhibitors

  • Santosh K. Singh,
  • Narendra Manne and
  • Manojit Pal

Beilstein J. Org. Chem. 2008, 4, No. 20, doi:10.3762/bjoc.4.20

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  • applications in the design and synthesis of novel DPP-IV inhibitors for the potential treatment of type-II diabetes. Experimental General methods All the compounds synthesized were characterized by NMR, IR and MS spectra. 1H NMR spectra were recorded on a Bruker Avance 300 spectrometer (300 MHz). Electrospray
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Published 12 Jun 2008
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