Results 11 to 20 of about 10,665 (213)

Hetero-Type Benzannulation Leading to Substituted Benzothio-Phenes

Molecules, 2021
TiCl4 (or SnCl4)-promoted hetero-type benzannulation reactions using various (2,2-dichlorocyclopropyl)(thiophen-2-yl)methanols proceeded smoothly to produce uniquely substituted 4-chlorobenzothiophenes (five examples).
Taro Kono, Ryosuke Sasaki, Hideki Goto, Masatoshi Kakuno, Yoo Tanabe   +4 more
doaj   +1 more source

Hydrodesulfurization of benzothiophene on Ni2P surface

Energy Exploration & Exploitation, 2020
The study of benzothiophene hydrodesulfurization reaction path contribute to clarifying the mechanism of hydrodesulfurization (HDS) of heavy oil. In this work, experiments and simulations were combined to study the reaction pathway of benzothiophene ...
Riyi Lin, Huida Pan, Weidong Xu, Liqiang Zhang, Xinwei Wang, Jianliang Zhang, Kai Chen   +6 more
doaj   +1 more source

Synthesis, Characterization and Biological Evaluation of Some Azo and Azo-Schiff Compounds [PDF]

Kirkuk Journal of Science, 2019
This work involves the preparation of some new azo and azo-Schiff compounds derived from benzothiophene, dibenzothiophene, and diamines (1, 5-diaminonaphthalene, and thiocarbohydrazide).
Hadi Azeez, Ahmed Al-kadhimi, Nashwan Tapabashi   +2 more
doaj   +1 more source

Metal‐Free Arylation of Benzothiophenes at C4 by Activation as their Benzothiophene S‐Oxides

Angewandte Chemie International Edition, 2023
AbstractBenzothiophenes, activated by oxidation to the corresponding S‐oxides, undergo C−H/C−H‐type coupling with phenols to give C4 arylation products. While an electron‐withdrawing group at C3 of the benzothiophene is important, the process operates without a directing group and a metal catalyst, thus rendering it compatible with sensitive ...
Ranjana Bisht, Mihai V. Popescu, Zhen He, Ameer M. Ibrahim, Giacomo E. M. Crisenza, Robert S. Paton, David J. Procter   +6 more
openaire   +3 more sources

Chiral Benzothiophene Synthesis via Enantiospecific Coupling of Benzothiophene S‐Oxides with Boronic Esters

Angewandte Chemie International Edition, 2021
AbstractBenzothiophenes are valuable heterocycles that are widely used in medicines, agrochemicals, and materials science. Herein, we report a general method for the synthesis of enantioenriched 2,3‐disubstituted benzothiophenes via a transition‐metal‐free C2‐alkylation of benzothiophenes with boronic esters.
Ruocheng Sang, Adam Noble, Varinder K. Aggarwal   +2 more
openaire   +4 more sources

Et3N/DMSO-supported one-pot synthesis of highly fluorescent β-carboline-linked benzothiophenones via sulfur insertion and estimation of the photophysical properties

Beilstein Journal of Organic Chemistry, 2020
A robust transition-metal-free strategy is presented to access novel β-carboline-tethered benzothiophenone derivatives from 1(3)-formyl-β-carbolines using elemental sulfur activated by Et3N/DMSO.
Dharmender Singh, Vipin Kumar, Virender Singh   +2 more
doaj   +1 more source

An electron-deficient triosmium cluster containing the thianthrene ligand: Synthesis, structure and reactivity of [Os₃(CO)₉(μ3-η2-C₁₂H₇S₂)(μ-H)] [PDF]

, 2008
Reaction of [Os₃(CO)₁₀(CH₃CN)₂] with thianthrene at 80 °C leads to the nonacarbonyl dihydride compound [Os₃(CO)₉(μ-3,4-η²-C₁₂H₆S₂)(μ-H)₂] (1) and the 46-electron monohydride compound [Os₃(CO)₉(μ₃-η²-C₁₂H₇S₂)(μ-H)] (2).
Hassan, Mohammad R., Kabir, Shariff E., Karim, Md. Manzurul, Nicholson, Brian K., Raha, Arun K., Rosenberg, Edward, Salassa, Luca, Sharmin, Ayesha   +7 more
core   +1 more source

Photochemical Electrocyclic Ring Closure and Leaving Group Expulsion from N-(9-oxothioxanthenyl)Benzothiophene Carboxamides [PDF]

, 2013
N-(9-Oxothioxanthenyl)benzothiophene carboxamides bearing leaving groups (LG− = Cl−, PhS−, HS−, PhCH2S−) at the C-3 position of the benzothiophene ring system photochemically cyclize with nearly quantitative release of the leaving group, LG−.
Sarker, Majher I., Shahrin, Tasnuva, Steinmetz, Mark G., Timerghazin, Qadir K.   +3 more
core   +3 more sources

Comparison of crystal structures of 4-(benzo[b]thiophen-2-yl)-5-(3,4,5-trimethoxyphenyl)-2H-1,2,3-triazole and 4-(benzo[b]thiophen-2-yl)-2-methyl-5-(3,4,5-trimethoxyphenyl)-2H-1,2,3-triazole

Acta Crystallographica Section E, 2014
The title compound, C19H17N3O3S (I), was prepared by a [3 + 2]cycloaddition azide condensation reaction using sodium azide and l-proline as a Lewis base catalyst. N-Methylation of compound (I) using CH3I gave compound (II), C20H19N3O3S.
Narsimha Reddy Penthala, Nikhil Reddy Madadi, Shobanbabu Bommagani, Sean Parkin, Peter A. Crooks   +4 more
doaj   +1 more source

Hydrocracking of long paraffins over Pt-Pd/WO3-ZrO2 in the presence of sulfur and aromatic impurities [PDF]

, 2013
The hydrocracking of long paraffins in the presence of sulfur and aromatic impurities using Pt–Pd/WO3–ZrO2 was assessed. The catalysts were tested for n-hexadecane hydrocraking in the presence and absence of several poisons, benzothiophene, quinolein ...
Busto, Mariana, Grau, Javier Mario, Sepulveda, Jorge H., Tsendra, Oksana, Vera, Carlos Roman   +4 more
core   +1 more source