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733 Newest Publications about the topic bromine

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ChemInform Abstract: Efficient Preparation of TMSCCl2Br and Its Use in Dichlorocyclopropanation of Electron‐Deficient Alkenes.

22-Sep-2016 | Darren S. Lee, Maria Jesus Duran‐Pena, Laurence Burroughs, Simon Woodward, ChemInform, 2016

Abstract The 1,4‐addition of TMSCCl2Br to fumarate (I) and cyclic nitroalkenes is accompanied by cyclization with bromine elimination to afford dichlorocyclopropane derivatives.

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Photochemical Nickel-Catalyzed C–H Arylation: Synthetic Scope and Mechanistic Investigations

21-Sep-2016 | Drew R. Heitz; John C. Tellis; Gary A. Molander, Journal of the American Chemical Society, 2016

An iridium photocatalyst and visible light facilitate a room temperature, nickel-catalyzed coupling of (hetero)aryl bromides with activated α-heterosubstituted or benzylic C(sp3)–H bonds. Mechanistic investigations on this unprecedented transformation have uncovered the possibility of an ...

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Bimetallic Cu‐Mn catalyzed synthesis of 2‐arylquinazolin‐4(3H)‐ones: Aqueous ammonia as a source of ring nitrogen

19-Sep-2016 | Sandip Bibishan Bharate, Rohit Sharma, Ram A Vishwakarma, European Journal of Organic Chemistry, 2016

A new method for synthesis of 2‐arylquinazolin‐4(3H)‐ones comprising a 3‐component coupling of 2‐bromobenzamide, aryl aldehydes and aqueous ammonia has been reported. The protocol involves Cu‐Mn spinel oxide as a heterogeneous catalyst and does not require any ligand or external oxidant. Key ...

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An Ultrasensitive Cyclization‐Based Fluorescent Probe for Imaging Native HOBr in Live Cells and Zebrafish

15-Sep-2016 | Kehua Xu, Dongrui Luan, Xiaoting Wang, Bo Hu, Xiaojun Liu, Fanpeng Kong, Bo Tang, Angewandte Chemie International Edition, 2016

Abstract Bromine has been reported recently as being the 28th essential element for human health. HOBr, which is generated in vivo from bromide, is a required factor in the formation of sulfilimine crosslinks in collagen IV. However, to date, no method for the specific detection of native HOBr ...

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Untargeted Screening and Distribution of Organo-Iodine Compounds in Sediments from Lake Michigan and the Arctic Ocean

09-Sep-2016 | Hui Peng; Chunli Chen; Jenna Cantin; David M. V. Saunders; Jianxian Sun; Song Tang; Garry Codling; Markus Hecker; St ..., Environmental Science & Technology, 2016

The majority of halogenated organic compounds present in the environment remain unidentified. To address this data gap, we recently developed an untargeted method (data-independent precursor isolation and characteristic fragment; DIPIC-Frag) for identification of unknown organo-bromine compounds. ...

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Diketopyrrolopyrrole Organic Thin‐Film Transistors: Impact of Alkyl Substituents and Tolerance of Ethylhexyl Stereoisomers

08-Sep-2016 | Matthias Stolte, Sabin‐Lucian Suraru, Patricia Diemer, Tao He, Christian Burschka, Ute Zschieschang, Hagen Klauk, Fr ..., Advanced Functional Materials, 2016

Bis(thiophen‐2‐yl)‐diketopyrrolopyrrole (DPP) dyes bearing various alkyl substituents at the amide positions (n‐butyl, n‐pentyl, n‐hexyl, n‐heptyl, n‐octyl, 2‐ethylhexyl) and chlorine (Cl), bromine (Br), or cyano (CN) substituents at the thiophene positions have been synthesized and investigated ...

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Stable bromoallene oxides

08-Sep-2016 | D. Christopher Braddock; Areeb Mahtey; Henry S. Rzepa; Andrew J. P. White, Chemical Communication, 2016

The first stable bromoallene oxides were obtained by the DMDO epoxidation of 1-bromo-1,3-di-tert-alkylallenes, producing the first crystalline allene oxide of any kind. The epoxidations are regioselective for the bromine-bearing Δ1,2 alkene, and also face selective producing single diastereomer ...

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Influence of the halogen and organometallic function in a KCTP (Co)polymerization

07-Sep-2016 | Tine Hardeman, Jasmine De Becker, Guy Koeckelberghs, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT The effect of changing the halogen and the organometallic function in a Kumada Catalyst Transfer Polycondensation (KCTP) of poly(3‐alkylthiophene)s (P3AT) is investigated. On the one hand, the bromine substituent is replaced with chlorine in the commonly used ...

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Rational Derivation of CETP Self-binding Helical Peptides by π-π Stacking and Halogen Bonding: Therapeutic Implication for Atherosclerosis

04-Sep-2016 | Author(s): Jian Zhu, Meijuan Lu, Lixia Zhu, Bioorganic Chemistry, 2016

Publication date: Available online 31 August 2016 Source:Bioorganic Chemistry Author(s): Jian Zhu, Meijuan Lu, Lixia Zhu The human cholesteryl ester transfer protein (CETP) transfers cholesteryl ester from high-density lipoprotein (HDL) to other lipoproteins and has been established ...

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Dual Carbon–Bromine Stable Isotope Analysis Allows Distinguishing Transformation Pathways of Ethylene Dibromide

30-Aug-2016 | Kevin Kuntze; Anna Kozell; Hans H. Richnow; Ludwik Halicz; Ivonne Nijenhuis; Faina Gelman, Environmental Science & Technology, 2016

The present study investigated dual carbon–bromine isotope fractionation of the common groundwater contaminant ethylene dibromide (EDB) during chemical and biological transformations, including aerobic and anaerobic biodegradation, alkaline hydrolysis, Fenton-like degradation, debromination by ...

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