Results 31 to 40 of about 25,792 (269)

Does Substrate Positioning Affect the Selectivity and Reactivity in the Hectochlorin Biosynthesis Halogenase?

Frontiers in Chemistry, 2018
In this work we present the first computational study on the hectochlorin biosynthesis enzyme HctB, which is a unique three-domain halogenase that activates non-amino acid moieties tethered to an acyl-carrier, and as such may have biotechnological ...
Amy Timmins, Nicholas J. Fowler, Jim Warwicker, Grit D. Straganz, Grit D. Straganz, Sam P. de Visser   +5 more
doaj   +1 more source

Asymmetric synthesis of gonytolide A: strategic use of an aryl halide blocking group for oxidative coupling [PDF]

, 2018
The first synthesis of the chromanone lactone dimer gonytolide A has been achieved employing vanadium(V)-mediated oxidative coupling of the monomer gonytolide C. An o-bromine blocking group strategy was employed to favor para- para coupling and to enable
Iwata, Takayuki, Porco, John A., Qin, Tian, Reichl, Kyle D., Scharf, Adam, Wu, Xiaowei   +5 more
core   +1 more source

Halogenation effect on physicochemical properties of Ti3C2 MXenes

JPhys Materials, 2023
Halogenated MXenes have been experimentally demonstrated to be promising two-dimensional materials for a wide range of applicability. However, their physicochemical properties are largely unknown at the atomic level.
Seyedeh Alieh Kazemi, Samuel Akinlolu Ogunkunle, Oscar Allen, William Wen, Alan Wee-Chung Liew, Shiwei Yin, Yun Wang   +6 more
doaj   +1 more source

Synthesis and Reactions of 3-Halogenated 2-CF₃-Indoles

Molecules, 2022
Halogenation of 2-trifluoromethylindole afforded 3-chloro-, 3-bromo- and 3-iodo derivatives in up to 98% yield. Methyl-, benzyl- and tosyl-groups can be installed at the nitrogen atom of prepared indoles in high yields by base catalyzed reaction with the
Vasiliy M. Muzalevskiy, Zoia A. Sizova, Valentine G. Nenajdenko   +2 more
doaj   +1 more source

Unusual structure-energy correlations in intramolecular Diels–Alder reaction transition states [PDF]

, 2014
Detailed analysis of calculated data from an experimental/computational study of intramolecular furan Diels–Alder reactions has led to the unusual discovery that the mean contraction of the newly forming C-C σ-bonds from the transition state to the ...
Bebbington, Magnus, Paterson, Martin, Rae, Robert, Żurek, Justyna   +3 more
core   +2 more sources

Halogenation effects in Intramolecular Furan Diels-Alder reactions:broad scope synthetic and computational studies [PDF]

, 2013
For the first time a comprehensive synthetic and computational study of the effect of halogen substitution on both furan and dienophile for the intramolecular Furan Diels-Alder (IMDAF) reaction has been undertaken.
Bebbington, Magnus William Paul, Paterson, Martin, Rae, Robert, Zurek, Justyna Marlena   +3 more
core   +1 more source

Synthesis and spectrometric study of some nucleophilic reactions of the antiepileptic molecule; 5,5-diphenyl imidazolidine-2,4-dione. [PDF]

مجلة جامعة الانبار للعلوم الصرفة, 2018
New reaction routs were performed for the compound 5,5-diphenyl 2,4-imidazolidinedione (I) to give derivatives (II – VII). These reactions include acylation, halogenation, reduction, and nucleophilic substitutions. Most of the derivatives showed variable
Saadi M. D. Al-Nuzal, Muhammad F. Al-Dulaimi, Athraa T. Hassan   +2 more
doaj   +1 more source

Functionalization of Pyrene To Prepare Luminescent Materials—Typical Examples of Synthetic Methodology [PDF]

, 2016
Pyrene-based π-conjugated materials are considered to be an ideal organic electro-luminescence material for application in semiconductor devices, such as organic light-emitting diodes (OLEDs), organic field-effect transistors (OFETs) and organic ...
Ajami, Alfonso, Baldo, Barton, Batsanov, Beaupré, Beller, Bernhardt, Bolm, Cao, Caronna, Caronna, Casas-Solvas, Cerfontain, Chang, Chen, Chen, Cheng, Chercka, Coventry, Crawford, Dewar, Duong, Eliseeva, Espinosa, Feng, Feng, Feng, Feng, Feng, Feng, Feng, Figueira-Duarte, Figueira-Duarte, Figueira-Duarte, Fihri, Fuchibe, Gao, García, Gonell, Grandbois, Hashmi, Hong, Hu, Hu, Hu, Hu, Hu, Hu, Hu, Hu, Hu, Hu, Ibáñez, Inoue, Irvine, Ito, Iwasaki, Jeon, Ji, Ji, Jiang, Jiao, Kamtekar, Katz, Kawano, Keller, Kim, Kim, King, Klauk, Kohl, Kulisic, Kumar, Lambert, Lee, Lee, Letizia, Li, Li, Liu, Malashikhin, Marco, Mateo-Alonso, Miyasaka, Miyaura, Miyaura, Miyazawa, Miyazawa, Mkhalid, Moorthy, More, More, Moulin, Ni, Niko, Oberender, Olah, Olah, Paul, Qiao, Rajca, Rajca, Rathore, Reineke, Schmidt-Mende, Sonar, Sun, Sun, Szaciłowski, Tan, Tanaka, Tang, Tao, Tashiro, Thomas, Trattnig, Trattnig, Valdés, Venkataramana, Verbiest, Verbiest, Visbal, Vollmann, Xiao, Xu, Yamato, Yamato, Yamato, Yamato, Yamato, Yua, Zak, Zhang, Zhang, Zhao, Zwijnenburg, Zöphel, Zöphel, Zöphel   +139 more
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Reactivity of TEMPO anion as a nucleophile and its applications for selective transformations of haloalkanes or acyl halides to aldehydes [PDF]

, 2004
Sodium 2,2,6,6-tetramethylpiperidine-N-oxide (TEMPO−Na+), generated by reduction of TEMPO· with sodium naphthalenide in THF, reacted with alkyl halides or acyl halides to produce O-alkylated or acylated TEMPOs, which were in turn oxidized with ...
Allen, Anderson, Boger, Braslau, Braslau, Gilbert, Hawker, Henry-Riyad, Hiroyuki Kawafuchi, Hudlicky, Hunter, Inokuchi, Jahn, Johnstone, Kersey, Kilenyi, Kruse, Matyjaszewski, Nahm, Ollivier, Page, Paquette, Ren, Rossi, Saunders, Schämann, Semmelhack, Sholle, Skene, Studer, Togo, Tsutomu Inokuchi, Uneyama, Wetter, Whitesides, Winterfeldt   +35 more
core   +1 more source

Microbial Halogenation With Specific Reference to Chiloroperoxidase

ASEAN Journal on Science and Technology for Development, 2017
Microbial Halogenation With Specific Reference to ...
D.C Smith, A. T Bult, G Holt, C Christy, M. D Lilly, C Rice   +5 more
doaj   +1 more source