Results 11 to 20 of about 863 (146)

Lewis Acid-Catalyzed Strain-Enabled (3+3) Annulation of Bicyclo[1.1.0]Butanes With Indolylalcohols: Synthesis of Indole-Fused Aza-Bicyclo[3.1.1]Heptanes. [PDF]

Adv Sci (Weinh)
Bicyclo[1.1.0]butanes undergo a Lewis acid‐catalyzed formal (3 + 3) annulation with indolyl alcohols to furnish indole‐fused aza‐bicyclo[3.1.1]heptanes. Strain‐release‐driven C‐C bond formation, followed by C‐N bond formation via ring expansion, enables the rapid assembly of rigid, sp3‐rich bicyclic architectures under mild reaction conditions ...
Dey M, Mahapatra TSD, Sharma P, Mane MV, Hazra CK.   +4 more
europepmc   +2 more sources

INCREASING THE EFFECTIVENESS OF STABILIZATION COLUMNS IN THE OIL AND GAS INDUSTRY

Известия высших учебных заведений: Нефть и газ, 2018
According to the results of the study, we found that increasing the pressure in a stabilization column improves the sharpness of separation of butanes from pentanes. As a result, the product quality is getting better.
D. B. Ermolin, E. R. Magaril, R. Z. Magaril   +2 more
doaj   +1 more source

Improving gasoline quality produced from MIDOR light naphtha isomerization unit

Egyptian Journal of Petroleum, 2017
Isomerization process became one of the best gasoline production sources, as it gives a high octane product while saving environment from pollution impacts.
M.F. Mohamed, W.M. Shehata, A.A. Abdel Halim, F.K. Gad   +3 more
doaj   +1 more source

Increasing LPG production by adding volatile hydrocarbons to reduce import gap in Egypt

Journal of Petroleum Exploration and Production Technology, 2020
Liquefied petroleum gas (LPG) becomes popular in the twentieth century as source of energy, since it is economically feasible to be produced, transported, sold and stored as a liquid fuel.
Ahmed M. Shahin, Ayat O. Ghallab, Ahmed Soliman   +2 more
doaj   +1 more source

Insertion of [1.1.1]propellane into aromatic disulfides

Beilstein Journal of Organic Chemistry, 2019
Herein we present the synthesis of symmetrically and unsymmetrically substituted 1,3-bissulfanylbicyclo[1.1.1]pentanes from disulfides and [1.1.1]propellane.
Robin M. Bär, Gregor Heinrich, Martin Nieger, Olaf Fuhr, Stefan Bräse   +4 more
doaj   +1 more source

Strain-release transformations of bicyclo[1.1.0]butanes and [1.1.1]propellanes

Tetrahedron Chem
Bicyclo[1.1.0]butanes (BCBs) and [1.1.1]propellanes (tricyclo[1.1.1.01,3]pentanes, TCPs) are structurally unique compounds with different chemical properties.
Qian-Qian Hu, Jie Chen, Yang Yang, Hui Yang, Ling Zhou   +4 more
doaj   +1 more source

Molecular Preorganization Unlocks Reversible Solid‐State Photoconversion in Dianthrylnaphthalene‐Based Molecular Solar Thermal Systems

Angewandte Chemie, EarlyView.
Three dianthrylnaphthalenes were synthesized and investigated for molecular solar thermal (MOST) energy storage. Naphthyl‐based bridging units preorganize the two anthracene moieties face‐to‐face, leading to improved photoisomerization quantum yield (QY) and unlocked bidirectional photoswitching in the solid state compared to previously reported ortho ...
Nicolò Baggi, Lidiya M. Muhammad, Helen Hölzel, Liang Fei, Rebecca J. Salthouse, Mariusz Kubus, Sarah Plutzar, Magnus B. Johansen, Kurt V. Mikkelsen, Kasper S. Pedersen, Kasper Moth‐Poulsen   +10 more
wiley   +2 more sources

Studying Removal of PHCs from Deposits of Petroleum Storage Tanks by Ozonation Method: Determining Optimal Conditions by Central Composite Design Method

Journal of Environmental Health and Sustainable Development, 2022
Introduction: The increasing trend of petroleum production in Iran and lack of proper and systematic management of waste products in the deposition of petroleum storage tanks have made the existing hydrocarbons as a major hazards to the environment.
Mahdi Farzadkia, Majid Kermani, Ali Esarfili, Mahdi Ghorbanian, Niloufar Borhani Yazdi, Ehsan Abouee Mehrizi   +5 more
doaj  

Supramolecular Enforcement of Planar Tetracoordinate Halides

Angewandte Chemie, EarlyView.
A calix[4]pyrrolato‐indium scaffold preorganizes Li4 pockets that trap Cl−, Br−, and I− in strongly flattened to square‐planar tetracoordinate environments. Computations reveal low planarization energies for the heavier halides, while crystallography shows that their geometry is readily modulated by subtle supramolecular and packing effects ...
Jie Zhang, Avijit Maiti, Lutz Greb
wiley   +2 more sources

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

Advanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source