Results 31 to 40 of about 65,001 (335)

Direct Vapor-Phase Bromination of Multiwall Carbon Nanotubes

Journal of Nanotechnology, 2012
We present the simple procedure of the vapor-phase bromination of multiwall carbon nanotubes (MWNTs) at moderate temperatures. MWNTs with average diameter 9±3 nm were treated with Br2 vapors at 250°C to produce Br-functionalized product.
Ilya Mazov, Dmitry Krasnikov, Andrey Stadnichenko, Vladimir Kuznetsov, Anatoly Romanenko, Olga Anikeeva, Evgeniy Tkachev   +6 more
doaj   +1 more source

Regioselectivity of the bromination of 1-oxo-1, 2, 3, 4-tetrahydronaphthalene and 6, 7-dimethyl-1-oxo-1, 2, 3, 4-tetrahydronaphthalene, and thiabiscyclanones synthesis on their basis [PDF]

Journal of the Serbian Chemical Society, 2004
On the basis of quantum chemical (PM3 andRHF/6-31G*) study, the regioselectivity of the bromination of 1-oxo-1,2,3,4-tetrahydronaphthalene (1) and 6,7-dimethyl-1-oxo-1,2,3,4-tetrahydronaphthalene (2) at their alicyclic and aromatic fragments was quantum ...
Pankratov Alexei N., Fedotova Olga V., Barabanova Antonina V., Alyonkina Tatiana V., Eliseev Yuri Yu   +4 more
doaj   +3 more sources

Synthesis of 2-Acetyl-1,4-Dimethoxynaphthalene, A Potential Intermediate for Disubstituted Naphtho[2,3,c]pyran-5,10-dione

Natural Product Communications, 2014
2-Acetyl-1-hydroxynaphthalene was converted into the title compound in three steps (bromination, substitution and methylation). 1-Methoxynaphthalene on bromination, substitution and acetylation, respectively, also yielded the target compound.
Kimberly Chinea, Willian Vera, Ajoy K. Banerjee   +2 more
doaj   +1 more source

Insect antifeedant potent 9H-fluorenacylbromides [PDF]

QScience Connect, 2013
Background: Attempts to produce greener bromination of 2-acetyl 9H-fluorene with KBr+KBrO3 reagent using fly-ash:H2O catalyst in aqueous media gave 9H-fluorenacylbromides.
G. Thirunarayanan
doaj   +1 more source

Bromination of hydrocarbons with CBr4, initiated by light-emitting diode irradiation

Beilstein Journal of Organic Chemistry, 2013
The bromination of hydrocarbons with CBr4 as a bromine source, induced by light-emitting diode (LED) irradiation, has been developed. Monobromides were synthesized with high efficiency without the need for any additives, catalysts, heating, or inert ...
Yuta Nishina, Bunsho Ohtani, Kotaro Kikushima   +2 more
doaj   +1 more source

An Efficient and Facile Methodology for Bromination of Pyrimidine and Purine Nucleosides with Sodium Monobromoisocyanurate (SMBI)

Molecules, 2013
An efficient and facile strategy has been developed for bromination of nucleosides using sodium monobromoisocyanurate (SMBI). Our methodology demonstrates bromination at the C-5 position of pyrimidine nucleosides and the C-8 position of purine ...
Roger Stromberg, Jyotirmoy Maity
doaj   +1 more source

Synthesis of Bromo Eugenol Derivatives with Molecular Bromine

Jurnal Kimia Sains dan Aplikasi
The bromination of eugenol using molecular bromine (Br2) has been widely reported. However, the outcomes have been inconsistent, and as a result, the specific steps of the bromination process have not been definitively established.
Verucha Fauzia Putri, Purwantiningsih Sugita, Budi Arifin   +2 more
doaj   +1 more source

Bromination and Diazo-Coupling of Pyridinethiones; Microwave Assisted Synthesis of Isothiazolopyridine, Pyridothiazine and Pyridothiazepines

Molecules, 2012
Isothiazolopyridines, pyridothiazines and pyridothiazepines are important compounds that possess valuable biological activities. This paper reports on the synthesis of these compounds using both conventional chemical methods and modern microwave ...
Ayman M. S. Youssef, Mohamed E. Azab, Mohamed M. Youssef   +2 more
doaj   +1 more source

Potassium iodide catalysis in the alkylation of protected hydrazines; pp. 10–17 [PDF]

Proceedings of the Estonian Academy of Sciences, 2016
Potassium iodide catalysis was applied for the synthesis of protected benzylhydrazines and hydrazinoacetic acid esters by the alkylation of protected hydrazines. Benzylic halogenides and halogenoacetic acid esters were employed as alkylating agents.
Anton Mastitski, Aleksander Abramov, Anneli Kruve, Jaak Järv   +3 more
doaj   +1 more source

Ligand-Enabled Pd(II)-Catalyzed Bromination and Iodination of C(sp3)–H Bonds

Journal of the American Chemical Society, 2017
We herein report the Palladium(II)-catalyzed bromination and iodination of a variety of α-hydrogen-containing carboxylic acid and amino acid derived amides. These reactions are exclusively enabled by quinoline-type ligands.
Ru-Yi Zhu, Tyler G. Saint-Denis, Y. Shao, Jian He, J. Sieber, C. Senanayake, jin-quan yu   +6 more
semanticscholar   +1 more source