Results 1 to 10 of about 7,661 (136)

Brominated Methanesulfonates: Characterization of K[Br3CSO3] ⋅ H2O, K2[Br2C(SO3)2] ⋅ H2O and K3[BrC(SO3)3] ⋅ H2O [PDF]

ChemistryOpen
Bromination of phenyl methanesulfonate, C6H5OSO2CH3, with KOBr followed by hydrolytic cleavage of the phenyl ester leads to the tribromomethanesulfonate (“tribrate”) K[Br3CSO3] ⋅ H2O, which crystallizes in a hitherto unknown triclinic modification (P1 ...
Katrin Eppers, Celina Sander, D. van Gerven, Mathias S. Wickleder   +3 more
doaj   +2 more sources

Solvent-free synthesis of molecular bromine and its application for in situ bromination of aromatic compounds [PDF]

Proceedings of the Estonian Academy of Sciences, 2020
Synthesis of molecular bromine in solvent-free reaction was studied using two different reaction mixtures. The first mixture consisted of solid KNO3 and gaseous HBr, while the second setup used solid NaBr, KNO3 and gaseous HCl.
Jaak Järv, Ida Rahu
doaj   +1 more source

Hypervalent Iodine-Mediated Chemoselective Bromination of Terminal Alkynes

Frontiers in Chemistry, 2022
Practical approaches for chemoselective mono-bromination, di-bromination, and tetra-bromination of terminal alkynes to generate 1-bromoalkynes, 1,2-dibromoalkenes, α,α-dibromoketones, and 1,1,2,2-tetrabromoalkanes based on efficient oxidative ...
Youzhi Li, Xuemei Chen, Daya Huang, Zhenming Xie, Yan Liu, Yan Liu   +5 more
doaj   +1 more source

Development of Self-Assembling bis-1,4-Dihydropyridines: Detailed Studies of Bromination of Four Methyl Groups and Bromine Nucleophilic Substitution

Molecules, 2023
One of the most important steps in the synthesis of 1,4-dihydropyridine (1,4-DHP) amphiphiles is the bromination of methyl groups in positions 2 and 6 of the entire ring.
Martins Kaukulis, Martins Rucins, Davis Lacis, Aiva Plotniece, Arkadij Sobolev   +4 more
doaj   +1 more source

Bromide reactivity in topsoil: Implications for use as a “conservative” tracer in assessing quantity and quality of water

Vadose Zone Journal, 2023
Bromide is a frequently used conservative tracer in soil leaching studies, including studies on contaminant leaching from arable topsoils. However, bromide often does not behave conservatively.
Christian Nyrop Albers, Annette Elisabeth Rosenbom   +1 more
doaj   +1 more source

On the influence of carbon nanoparticles as additives in the electrosynthesis of bromoarenes

Carbon Trends, 2021
Kinetic studies on an electrochemical bromination reaction are presented. In the presence of different carbon nanoparticles bromide salts were used as safe bromine sources and the interplay of graphene derivates with different electrode materials was ...
Felix Pippert, Rene Wilhelm
doaj   +1 more source

One‐Pot Synthesis of 2,5‐Furandicarboxylic Acid from 2‐Furoic Acid by a Pd‐catalyzed Bromination–Hydroxycarbonylation Tandem Reaction in Acetate Buffer

ChemistryOpen, 2022
The one‐pot synthesis of 2,5‐furandicarboxylic acid from 2‐furoic acid with a yield of 57 % was achieved for the first time using a Pd‐catalyzed bromination‐hydroxycarbonylation tandem reaction in HOAc‐NaOAc buffer.
Yin‐Qing Yao, Kai‐Chun Zhao, Yi‐Ying Zhuang, Xiao‐Chao Chen, Prof. Dr. Yong Lu, Prof. Dr. Ye Liu   +5 more
doaj   +1 more source

Indole and azaindole halogenation catalyzed by the RebH enzyme variant 3-LSR utilizing co-purified E. coli reductase

Frontiers in Bioengineering and Biotechnology, 2022
Biocatalytic C-H halogenation is becoming increasingly attractive due to excellent catalyst-controlled selectivity and environmentally benign reaction conditions. Significant efforts have been made on enzymatic halogenation of industrial arenes in a cost-
Eunice Hui Yen Li, Barindra Sana, Timothy Ho, Ding Ke, Farid J. Ghadessy, Hung A. Duong, Jayasree Seayad   +6 more
doaj   +1 more source

Electrochemical Bromination of Glycals

Frontiers in Chemistry, 2021
Herein, the convenient one-step electrochemical bromination of glycals using Bu4NBr as the brominating source under metal-catalyst-free and oxidant-free reaction conditions was described.
Zhao-Xiang Luo, Miao Liu, Tian Li, De-Cai Xiong, De-Cai Xiong, Xin-Shan Ye   +5 more
doaj   +1 more source

Effect of Bromination on the Quorum Sensing-Inhibiting Properties of Indole-3-Carboxaldehydes in Chromobacterium violaceum AHL System

Microbiology Research, 2021
Quorum sensing (QS) is a form of bacterial communication involved in the production of virulence factors in many species. As a result, inhibition of quorum sensing may be of use in mitigating pathogenesis. The signaling molecule indole is currently being
Chesley A. Kemp, Donna K. McCullough, Dobrusia Bialonska, Paul J. T. Johnson   +3 more
doaj   +1 more source