Results 71 to 80 of about 84,237 (324)

Enantioselective Synthesis of 5-epi-Citreoviral Using Ruthenium-Catalyzed Asymmetric Ring-Closing Metathesis [PDF]

, 2009
Chiral ruthenium olefin metathesis catalysts can perform asymmetric ring-closing reactions in ≥90% ee with low catalyst loadings. To illustrate the practicality of these reactions and the products they form, an enantioselective total synthesis of 5-epi ...
Funk, Timothy W.
core   +2 more sources

Top‐Down Fabricated Wood‐Derived Pressure and Strain Sensors: A Review

Advanced Science, EarlyView.
This review focuses on wood‐derived pressure/strain sensors fabricated via top‐down strategies. It analyzes wood's structural composition, examines processing techniques, discusses sensor types and sensing mechanisms, and reviews existing research. The article concludes with future directions for enhancing performance and scalability.
Yi Ren, Fuyao Liu, Yanan Zhong, Shengbo Ge, Zhipeng Shi, Siling Lin, Hongli Song, Yingying Zhang, Wei Fan   +8 more
wiley   +1 more source

Review and perspectives on TS-1 catalyzed propylene epoxidation

iScience
Summary: Titanium silicate zeolite (TS-1) is widely used in the research on selective oxidations of organic substrates by H2O2. Compared with the chlorohydrin process and the hydroperoxidation process, the TS-1 catalyzed hydroperoxide epoxidation of ...
Jimei Yang, Shuling Liu, Yanyan Liu, Limin Zhou, Hao Wen, Huijuan Wei, Ruofan Shen, Xianli Wu, Jianchun Jiang, Baojun Li   +9 more
doaj   +1 more source

A minimal mathematical model of nonphotochemical quenching of chlorophyll fluorescence [PDF]

, 2010
Copyright © 2010 Elsevier Ireland Ltd.
Ebenhöh, Oliver, Houwaart, Torsten, Lokstein, Heiko, Schlede, Stephanie, Tirok, Katrin   +4 more
core   +1 more source

Sustainable catalytic protocols for the solvent free epoxidation and anti-dihydroxylation of the alkene bonds of biorenewable terpene feedstocks using H2O2 as oxidant

Green Chemistry, 2020
Solvent free catalytic epoxidation of biorenewable terpene feedstocks, including untreated crude sulfate turpentine.
William B. Cunningham, Joshua D. Tibbetts, Marc Hutchby, Katarzyna A. Maltby, M. Davidson, Ulrich Hintermair, P. Plucinski, S. Bull   +7 more
semanticscholar   +1 more source

Spatial Control Over Tether‐Tunable Coordination on Palladium for Divergent Synthesis of Bicyclo[n.1.0]alkanes via Oxidative Cyclopropanation of Enynes

Advanced Science, EarlyView.
We have developed a Pd‐catalyzed oxidative cyclopropanation of 1,n‐enynes employing cyclic diacyl peroxides as bifunctional reagents that serve as both tether‐tunable oxidants and spatially controlled dicarboxylate anions. ABSTRACT Bicyclo[n.1.0]alkanes are highly valuable scaffolds in drug discovery and synthetic chemistry.
Ting Yuan, Lei Shi
wiley   +1 more source

Strategies for Paired Electrolysis with Enhanced Efficiency

Advanced Energy and Sustainability Research, EarlyView.
This review summarizes the fundamentals, challenges, and strategies for paired electrolysis, with examples in the chlor‐alkali, hydrogen production, CO2 reduction, and ammonia synthesis industries. Future directions include the development of advanced membranes, computational studies, process integration, scale‐up, and techno‐economic analysis.
Yuanyuan Yao, Xin Yang, Yuqi Pan, Leo Lai, Liuyue Cao, Li Wei, Yuan Chen   +6 more
wiley   +1 more source

Epoxidação do óleo de mamona e derivados empregando o sistema catalítico VO(acac)2/TBHP Epoxidation of castor oil and its derivatives using VO(acac)2/TBHP as the catalytic system

Química Nova, 2008
The alternative system VO(acac)2/TBHP was investigated for the epoxidation reaction of castor oil and its derivatives. Results of 88% of conversion, 73% of epoxidation and 82% of selectivity were obtained for the system containing 20% excess of TBHP and ...
Marta Regina dos Santos Nunes, Marcia Martinelli, Marcelo Monteiro Pedroso   +2 more
doaj   +1 more source

Enabling highly (R)-enantioselective epoxidation of styrene by engineering unique non-natural P450 peroxygenases†

Chemical Science, 2020
Unlike the excellent (S)-enantioselective epoxidation of styrene performed by natural styrene monooxygenases (ee > 99%), the (R)-enantioselective epoxidation of styrene has not yet achieved a comparable efficiency using natural or engineered oxidative ...
Panxia Zhao, Jie Chen, Nana Ma, Jingfei Chen, Xiangquan Qin, Chuanfei Liu, Fuquan Yao, L. Yao, L. Jin, Zhiqi Cong   +9 more
semanticscholar   +1 more source

Iminologous Epoxide Ring-Closure

Chemical Science, 2022
Herein, we apply the principle of iminology to the well-established epoxide ring-closure reaction. The synthesis of tetrasubstituted, nitrile-tethered epoxides can be achieved via activation of iminologous diols followed by fragmentation. Mechanistic study reveals the transformation to be stereoretentive, which is consistent with the concerted nature ...
Chieh-Hung Tien, Alan J. Lough, Andrei K. Yudin   +2 more
openaire   +2 more sources