Results 181 to 190 of about 568,522 (376)

Brønsted Acid‐Catalyzed Enantioselective and Para‐Selective Addition of Phenols to 1‐Alkynylnaphth‐2‐Ols

Advanced Synthesis &Catalysis, EarlyView.
Abstract A chiral Brønsted acid‐catalyzed synthesis of axially chiral alkenes was developed via an enantioselective and para‐selective Friedel–Crafts reaction between phenols and 1‐alkynylnaphth‐2‐ols. This methodology features an efficient hydroarylation with high functional group tolerance, complete para‐selectivity, excellent yields (up to 99%), and
Anjali Dahiya, Kalyan Dhara, Jordan Garo, Julien Gicquiaud, Alexandre Karnat, Murielle Berlande, Philippe Hermange, Jean‐Marc Sotiropoulos, Patrick Y. Toullec   +8 more
wiley   +1 more source

The Determination of Oxygen and Sulfur in Petroleum Products by Fast-neutron Activation Analysis

, 1967
Mitsuhisa TAMURA, Naoomi Yamaki
openalex   +2 more sources

Behaviour of chemical modifiers in the determination of arsenic by electrothermal atomic absorption spectrometry in petroleum products [PDF]

, 2005
Márcio V. Rebouças, Sérgio L.C. Ferreira, B DEBARROSNETO   +2 more
openalex   +1 more source

Energy and Economic Growth in Pakistan [PDF]

Recent rise in energy prices, shrinking existing resources, and the search for alternative sources of energy and energy conservation technologies have brought into focus the issue of causality between energy use and economic growth.
Rehana Siddiqui
core  

Au(I)‐Catalyzed Regiodivergent Hydroarylation of Allenes for the Synthesis of Tetrahydrodiazepines or Tetrahydrodiazonines

Advanced Synthesis &Catalysis, EarlyView.
Abstract Allenes tethered to pyrroles undergo Au(I)‐catalyzed hydroarylation leading to tetrahydrodiazepines or tetrahydrodiazonines. The regioselectivity of the reaction is governed by both the substitution pattern of the allene and the nature of the Au(I) ligand. Hence, alkyl‐gem‐disubstituted allenes preferentially lead to tetrahydrodiazepines via 7‐
Pengyu Zhou, Pascal Retailleau, Vincent Gandon, Arnaud Voituriez, Xavier Guinchard   +4 more
wiley   +1 more source

Generative AI-driven forecasting of oil production [PDF]

arXiv
Forecasting oil production from oilfields with multiple wells is an important problem in petroleum and geothermal energy extraction, as well as energy storage technologies. The accuracy of oil forecasts is a critical determinant of economic projections, hydrocarbon reserves estimation, construction of fluid processing facilities, and energy price ...
arxiv  

Determination of Nitrogen in Petroleum Products by Fast-neutron Activation and Matrix Effects

, 1969
Mituhisa TAMURA
openalex   +2 more sources

Synthesis of Unnatural Amino Acids via β‐Aminoaldehyde C–H Arylation using HAT‐Metallaphotoredox Catalysis

Advanced Synthesis &Catalysis, EarlyView.
Abstract Unnatural amino acids play a crucial role in advancing protein engineering and drug development. In this study, we present the synthesis of a series of γ‐aryl‐keto‐α‐amino acids through the direct C−H arylation of readily accessible β‐aminoaldehydes and aryl bromides, promoted by hydrogen atom transfer combined with metallaphotoredox catalysis.
Mariana dos S. Dupim, Bruno M. da S. Santos, Lívia C. R. M. da Frota, Fernanda G. Finelli   +3 more
wiley   +1 more source

Does the spillage of petroleum products in Anopheles breeding sites have an impact on the pyrethroid resistance? [PDF]

, 2007
Rousseau F Djouaka, Adekunle A. Bakare, Honoré Bankole, J.M.C. Doannio, Ousmane N Coulibaly, Hortense Kossou, Manuele Tamò, Harcourt I Basene, O.D. Popoola, Martin Akogbéto   +9 more
openalex   +1 more source

Noteworthy: oil markets: Saudis abandon WTI price as benchmark [PDF]

Saudi Arabia's state-owned oil company no longer uses West Texas Intermediate (WTI) crude oil as its pricing benchmark. Saudi Aramco, the third largest U.S.
Jackson Thies
core