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Search for "chlorine gas" in Full Text gives 12 result(s) in Beilstein Journal of Organic Chemistry.

Unprecedented visible light-initiated topochemical [2 + 2] cycloaddition in a functionalized bimane dye

  • Metodej Dvoracek,
  • Brendan Twamley,
  • Mathias O. Senge and
  • Mikhail A. Filatov

Beilstein J. Org. Chem. 2025, 21, 500–509, doi:10.3762/bjoc.21.37

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  • the chlorination reactions on the synthetic path to Cl2B and Me2B, chlorine gas was generated by reacting MnO₂ with HCl and then passed through a stirred suspension of the pyrazolinone. In the case of Me4B, trichloroisocyanuric acid (TCICA) was used as the chlorinating agent as a safer alternative to
  • chlorine gas, with the reaction conducted by stirring the pyrazolinone with TCICA in DCM for 18 hours. Bimanes can be purified easily using column chromatography with silica gel as the stationary phase, with the compounds Cl2B, Me2B, and Me4B only requiring neat DCM as the eluent. After chromatographic
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Published 05 Mar 2025

Oxidative fluorination with Selectfluor: A convenient procedure for preparing hypervalent iodine(V) fluorides

  • Samuel M. G. Dearman,
  • Xiang Li,
  • Yang Li,
  • Kuldip Singh and
  • Alison M. Stuart

Beilstein J. Org. Chem. 2024, 20, 1785–1793, doi:10.3762/bjoc.20.157

Graphical Abstract
  • multiple extractions into hexane under a nitrogen atmosphere in a glovebox. A similar synthetic approach to acyclic iodine(V) fluorides was developed more recently by Ismalaj and co-workers by reacting iodoarenes with 6 equivalents of KF and ex situ-generated chlorine gas within a two-chamber reactor setup
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Published 29 Jul 2024

Advancements in hydrochlorination of alkenes

  • Daniel S. Müller

Beilstein J. Org. Chem. 2024, 20, 787–814, doi:10.3762/bjoc.20.72

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  • published results from their work on hydrochlorination of alkenes in the presence of wet nitromethane and antimony chloride complex 104 which is prepared from dppe (1,2-bis(diphenylphosphino)ethane), chlorine gas, and SbCl5 in equimolar ratios (Scheme 16) [69]. They showed that CD3NO2 did not lead to
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Published 15 Apr 2024

High-speed C–H chlorination of ethylene carbonate using a new photoflow setup

  • Takayoshi Kasakado,
  • Takahide Fukuyama,
  • Tomohiro Nakagawa,
  • Shinji Taguchi and
  • Ilhyong Ryu

Beilstein J. Org. Chem. 2022, 18, 152–158, doi:10.3762/bjoc.18.16

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  • chloroethylene carbonate, a precursor to vinylene carbonate. A novel photoflow setup designed for a gas–liquid biphasic reaction turned out to be useful for the direct use of chlorine gas. The setup employed sloped channels so as to make the liquid phase thinner, ensuring a high surface-to-volume ratio. When
  • chlorination, which is consistent with the requirement of photoirradiation for the purpose of radical initiation. Near-complete selectivity for single chlorination required the low conversion of ethylene carbonate such as 9%, which was controlled by limited introduction of chlorine gas. At a higher conversion
  • of ethylene carbonate such as 61%, the selectivity for monochlorinated ethylene carbonate over dichlorinated ethylene carbonate was 86%. We found that the substrate contamination with water negatively influenced the performance of the C–H chlorination. Keywords: C–H chlorination; chlorine gas
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Published 27 Jan 2022

Mechanochemistry-assisted synthesis of hierarchical porous carbons applied as supercapacitors

  • Desirée Leistenschneider,
  • Nicolas Jäckel,
  • Felix Hippauf,
  • Volker Presser and
  • Lars Borchardt

Beilstein J. Org. Chem. 2017, 13, 1332–1341, doi:10.3762/bjoc.13.130

Graphical Abstract
  • -separation phenomena might be induced, which results in a lower pore volume of the received carbon material (Table 1). Although chlorine gas is widely used in many industrial processes such as the Kroll process, it should be the attempt of future research to substitute chlorine gas by a green alternative to
  • resulting polymer was heated to 900 °C at a heating rate of 300 °C h−1 in a horizontal tubular furnace under argon atmosphere with a flowrate of 150 mL min−1. After 1 h at 900 °C, the gas atmosphere was changed to a mixture of argon (flowrate: 70 mL min−1) and chlorine gas (flowrate: 80 mL min−1) while the
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Published 06 Jul 2017

Synthesis and enzymatic ketonization of the 5-(halo)-2-hydroxymuconates and 5-(halo)-2-hydroxy-2,4-pentadienoates

  • Tyler M. M. Stack,
  • William H. Johnson Jr. and
  • Christian P. Whitman

Beilstein J. Org. Chem. 2017, 13, 1022–1031, doi:10.3762/bjoc.13.101

Graphical Abstract
  • ]. Ethyl 2-bromocrotonate was synthesized following the protocol for the synthesis of ethyl 2-chlorocrotonate except that liquid bromine was added dropwise under argon in place of chlorine gas [11]. Accordingly, ethyl crotonate (15 g) was dissolved in CH2Cl2 (100 mL), chilled in an ice bath, and a solution
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Published 26 May 2017

Continuous formation of N-chloro-N,N-dialkylamine solutions in well-mixed meso-scale flow reactors

  • A. John Blacker and
  • Katherine E. Jolley

Beilstein J. Org. Chem. 2015, 11, 2408–2417, doi:10.3762/bjoc.11.262

Graphical Abstract
  • with reports of unpredictable and rapid decomposition [11][14][15][16]. N-Chloramines are prepared conventionally by reaction of the amine precursor with an electrophilic chlorine source [14]. Despite its atom efficiency use of chlorine gas is undesirable due to its toxicity and strong oxidising
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Published 02 Dec 2015

Electrocarboxylation: towards sustainable and efficient synthesis of valuable carboxylic acids

  • Roman Matthessen,
  • Jan Fransaer,
  • Koen Binnemans and
  • Dirk E. De Vos

Beilstein J. Org. Chem. 2014, 10, 2484–2500, doi:10.3762/bjoc.10.260

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  • stable electrode setup, with current efficiencies over 50% (Scheme 23) [153]. In the catholyte an organic solvent is used while the anolyte consists of an aqueous NaCl solution. The anodically formed chlorine gas is continuously removed from the anolyte. A cation exchange membrane allows the selective
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Published 27 Oct 2014

Use of 3-[18F]fluoropropanesulfonyl chloride as a prosthetic agent for the radiolabelling of amines: Investigation of precursor molecules, labelling conditions and enzymatic stability of the corresponding sulfonamides

  • Reik Löser,
  • Steffen Fischer,
  • Achim Hiller,
  • Martin Köckerling,
  • Uta Funke,
  • Aurélie Maisonial,
  • Peter Brust and
  • Jörg Steinbach

Beilstein J. Org. Chem. 2013, 9, 1002–1011, doi:10.3762/bjoc.9.115

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  • , Millington et al. were able to obtain the sulfonylating agent 10 by saturating an aqueous suspension of thiocyanate 9 with chlorine gas [28]. In our hands, superior results were achieved when this transformation was carried out in a mixture of chlorine-saturated water and acetic acid as cosolvent for 9. The
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Published 27 May 2013

Palladium- catalyzed cross coupling reactions of 4-bromo- 6H-1,2-oxazines

  • Reinhold Zimmer,
  • Elmar Schmidt,
  • Michal Andrä,
  • Marcel-Antoine Duhs,
  • Igor Linder and
  • Hans-Ulrich Reissig

Beilstein J. Org. Chem. 2009, 5, No. 44, doi:10.3762/bjoc.5.44

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  • . HRMS (80 eV, 40 °C) m/z calcd for C12H1179Br2NO2: 358.9157; found: 358.9160. Chlorination of 6H-1,2-oxazine 1b, typical procedure Chlorine gas was passed into diethyl ether (28 mL) at −30 °C until the solution became dark yellow. Then, 6H-1,2-oxazine 1b (0.200 g, 1.00 mmol) was added and the reaction
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Preliminary Communication
Published 16 Sep 2009

Ru-catalyzed dehydrogenative coupling of carboxylic acids and silanes - a new method for the preparation of silyl ester

  • Guo-Bin Liu and
  • Hong-Yun Zhao

Beilstein J. Org. Chem. 2008, 4, No. 27, doi:10.3762/bjoc.4.27

Graphical Abstract
  • chlorination of silanes, either with chlorine gas [7] or with hydrochloric acid under Pd/C catalysis [25][26], the synthesis of silyl esters from the corresponding silanes requires two reaction steps. Some newer synthetic protocols to silyl esters have been developed and a lot of literature focuses itself on
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Preliminary Communication
Published 30 Jul 2008

Development of potential manufacturing routes for substituted thiophenes – Preparation of halogenated 2-thiophenecarboxylic acid derivatives as building blocks for a new family of 2,6-dihaloaryl 1,2,4-triazole insecticides

  • John W. Hull Jr.,
  • Duane R. Romer,
  • David E. Podhorez,
  • Mezzie L. Ash and
  • Christine H. Brady

Beilstein J. Org. Chem. 2007, 3, No. 23, doi:10.1186/1860-5397-3-23

Graphical Abstract
  • 2-thiophenecarbonitrile with chlorine gas at 500°C with an average residence time of 6 seconds gave 3,4,5-trichloro-2-thiophenenitrile 3 in a 69% distilled yield, a process that was carried out on a multi-kilogram scale in the laboratory. Finally, a route for the preparation of 3,4,5-trichloro-2
  • support of grade 03 silica gel, which generated a high surface area reaction zone. By feeding a 20% perchloroethylene solution of 20 to the reactor with an excess of chlorine gas at an average reactor residence time of approximately 6 seconds, 3 was obtained as the major product along with minor amounts
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Published 04 Sep 2007
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