Results 141 to 150 of about 2,362,057 (282)

PTC in the Polyenolate‐Mediated [10+2]‐Cycloaddition for the Synthesis of α,α‐Disubstituted Amino Acid Precursors

Advanced Synthesis &Catalysis, EarlyView.
Abstract The manuscript describes a formal [10+2] higher‐order cycloaddition between 2‐arylideneindan‐1‐ones and α‐alkylidene azlactones as higherene precursors and higherenofiles respectively. The reaction is realized under Brønsted‐base catalysis utilizing the phase transfer catalysis approach.
Joanna Dybowska, Artur Przydacz, Anna Skrzyńska, Łukasz Albrecht   +3 more
wiley   +1 more source

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

Petroleum and Natural Gas Engineering [PDF]

, 1974
openaire   +4 more sources

Photoinduced Catalytic Alkylation of Active Methine Compounds with Nonactivated Alkenes Using Yttrium Triflate as a Lewis Acid Catalyst

Advanced Synthesis &Catalysis, EarlyView.
Abstract Photoinduced catalytic alkylation reactions of active methine compounds with nonactivated alkenes have been developed using an organophotocatalyst, a metal Lewis acid, an arylthiol, and an amine base catalyst system. The alkylation reactions proceeded smoothly under ambient conditions with blue light irradiation, affording the desired products
Yasuhiro Yamashita, Rentaro Enokijima, Yoshihiro Ogasawara, Tomoya Hisada, Shū Kobayashi   +4 more
wiley   +1 more source

Heterogeneously Catalyzed Cascade Oxidative Coupling/Dearomative Spirocyclization of Diarylamines: Facile Access to Spiroacridines

Advanced Synthesis &Catalysis, EarlyView.
Abstract Spirocyclic compounds, particularly spirocyclohexadienones, are important in pharmaceuticals due to their biological activity. In this study, we develop a catalytic cascade oxidative spirocyclization of diarylamines for the rapid access to highly functionalized spirocyclohexadienones. Using commercially available recyclable heterogeneous metal
Kenji Matsumoto, Naho Sato, Yoshinori Kobayashi, Kanako Date, Yasuko Okamoto, Touya Kariya, Tsukasa Hirokane, Masahiro Yoshida   +7 more
wiley   +1 more source

Continuous Flow Technology Enabling Photochemistry

Advanced Synthesis &Catalysis, Accepted Article.
The merger of continuous flow technology and modern photochemistry has enabled countless applications showcasing new opportunities for chemical synthesis demonstrating improvements in selectivity, safety, sustainability and scalability. This focused review aims to highlight a selection of recently published case studies from academic and industrial ...
Ruairi Crawford, Marcus Baumann
wiley   +1 more source

Development of Photo‐Biocatalytic Redox System for Asymmetric Synthesis of Optically Active Amines Using Blue Light and Transaminases. A Case Study Toward Mavacamten

Advanced Synthesis &Catalysis, EarlyView.
Abstract α‐Chiral amines are versatile building blocks for the asymmetric synthesis of optically pure high‐added‐value chemicals, including pharmaceuticals, agrochemicals, and natural products. Herein, we report a one‐pot, two‐step sequential deracemization of racemic sec‐alcohols to optically enriched primary amines throught a photo‐biocatalytic ...
Natalia Antos, Aleksandra Rudzka, Anna Hoser, Tamara Reiter, Wolfgang Kroutil, Paweł Borowiecki   +5 more
wiley   +1 more source

Advances in Early Warning of Thermal Runaway in Lithium‐Ion Battery Energy Storage Systems

Advanced Sensor Research, EarlyView.
This review presents a comprehensive analysis of cutting‐edge sensing technologies and strategies for early detection and warning of thermal runaway in lithium‐ion battery energy storage systems. It discusses the factors inducing thermal runaway, the evolution mechanism, and the detectable characteristic signals, along with advancements in ...
Duzhao Han, Juan Wang, Chengxian Yin, Yuxin Zhao   +3 more
wiley   +1 more source

Lightweight, Strong, Hydrostable, Bendable, Rolled‐Up, and Biodegradable Straws Enabled by Nano‐ and Microarchitecture Tuning of the Wood Cell Wall and Molecular Welding Strategy

Advanced Sustainable Systems, EarlyView.
An all‐natural straw is fabricated through nano‐ and microarchitectural tuning of the wood cell wall using a molecular welding strategy. These all‐natural straws offer multiple advantages, including superior mechanical performance, excellent water and beverage stability, biocompatibility, full biodegradability, and recyclability.
Shuaiming He, Tianle Chen, Zhulin Li, Yang Li, Joshua M. Little, Chu‐Chun Liang, Yiqiang Wu, I‐Chi Lee, Po‐Yen Chen   +8 more
wiley   +1 more source

Development of Pectin/Gelatin/Glutathione/Calcium Chloride Crosslinked Hybrid Composite Antioxidant Edible Coatings for the Preservation of Local Butter

Advanced Sustainable Systems, EarlyView.
Inspired from biomedical and pharmaceutical research, crosslinked pectin‐based edible composite coatings are developed for the preservation of butter. The developed coatings exhibit crosslinker calcium chloride dependent preservation response on coated butter over the 60 days storage period. Abstract Given the vulnerability of butter to rancidity there
Orass T. Al‐Ibresam, Rawdah M. Al‐Ali, Anfal A. Al‐Temimi, Le N. M. Dinh, Yin Yao, Sawsan A. Al‐Hilifi, Vipul Agarwal   +6 more
wiley   +1 more source