Results 71 to 80 of about 52,647 (305)

HAT-Initiated Fragmentation of 4-(Dimethylamino)-1-((3-methylbut-2-en-1-yl)oxy)-3-phenylbut-3-en-2-one

Molbank
An alkene-tethered enaminone 7 was synthesized in four steps from bromoacetic acid and 3,3-dimethylallyl alcohol. The enaminone was fully characterized, including UV-Vis spectra.
Andrej Bogataj, Luka Ciber, Nejc Petek, Franc Požgan, Jurij Svete, Bogdan Štefane, Uroš Grošelj   +6 more
doaj   +1 more source

Gold Nanoparticle-Catalyzed Environmentally Benign Deoxygenation of Epoxides to Alkenes

Molecules, 2011
We have developed a highly efficient and green catalytic deoxygenation of epoxides to alkenes using gold nanoparticles (NPs) supported on hydrotalcite [HT: Mg6Al2CO3(OH)16] (Au/HT) with alcohols, CO/H2O or H2 as the reducing reagent.
Kiyotomi Kaneda, Koichiro Jitsukawa, Akifumi Noujima, Tomoo Mizugaki, Takato Mitsudome   +4 more
doaj   +1 more source

Marine furanocembranoids-inspired macrocycles enabled by Pd-catalyzed unactivated C(sp3)-H olefination mediated by donor/donor carbenes

Nature Communications, 2021
Furanocembranoid-like natural products with the alkene-substituted furan scaffold display a range of biological activities, but are difficult to access. Here, the authors report a modular biomimetic strategy to synthesise diverse alkene-substituted furan-
Jiping Hao, Xueying Guo, Shijun He, Zhongliang Xu, Lu Chen, Zhongyu Li, Bichao Song, Jianping Zuo, Zhenyang Lin, Weibo Yang   +9 more
doaj   +1 more source

Homologative alkene difunctionalization

Nature Chemistry
Abstract Systematic evaluation of homologous series plays a pivotal role in synthetic and medicinal chemistry 1,2 . Despite their structural resemblance, the preparation of homologs often requires individual synthetic planning tailored to distinct precursors and reactions.
Morgan Kim, So Yeon Ahn, Seongmin Kim, Junhwan Won, Dongwook Kim, Seung Youn Hong   +5 more
openaire   +2 more sources

Polymeric Sorbents as Energy‐Efficient Alternative to Cryogenic Distillation for Light Hydrocarbon Purification

Advanced Materials, EarlyView.
The transition from cryogenic distillation to polymeric sorbents for light hydrocarbon purification is crucial for energy and environmental sustainability. The polymeric sorbents are engineered to separate gas mixtures based on their specific properties.
Kelechi Festus, Ankit Mondal, Suman Mandal, Jazmine Aiya D. Marquez, Arnab Ghosh, Aishi Sikdar, Urme Podder, Ahana Sarkar, Qingsheng Wang, Hong‐Cai Zhou   +9 more
wiley   +1 more source

Toxicokinetic and Partial Mass Balance Assessment of ¹⁴C-Alpha Olefins in Rats

Journal of Xenobiotics
Higher olefins are a class of alkenes widely used as intermediates in the production of essential consumer and industrial products. This radiolabel disposition and partial mass balance study investigated the distribution and excretion of four 14C ...
Quan Shi, Jamie Dunn, Juan-Carlos Carrillo, Michael G. Penman, Robert H. Powrie, Corinne Haines, Hua Shen, Yuan Tian, Sophie Jia, Fabienne Hubert, Peter J. Boogaard   +10 more
doaj   +1 more source

Pauson–Khand reaction of fluorinated compounds

Beilstein Journal of Organic Chemistry, 2020
The Pauson–Khand reaction (PKR) is one of the key methods for the construction of cyclopentenone derivatives, which can in turn undergo diverse chemical transformations to yield more complex biologically active molecules.
Jorge Escorihuela, Daniel M. Sedgwick, Alberto Llobat, Mercedes Medio-Simón, Pablo Barrio, Santos Fustero   +5 more
doaj   +1 more source

Palladium-catalyzed regio- and enantioselective migratory allylic C(sp3)-H functionalization

Nature Communications, 2021
Alkene isomerizations and asymmetric C–H functionalizations have been independently studied, but their combination in one protocol is uncommon. Here the authors show a palladium-catalyzed method to iteratively “walk” a terminal alkene along a carbon ...
Ye-Wei Chen, Yang Liu, Han-Yu Lu, Guo-Qiang Lin, Zhi-Tao He   +4 more
doaj   +1 more source

Defect‐Engineered Microwave‐Responsive Ni@C Composites From Waste PET for Catalytic Plastic Upcycling

Advanced Materials, EarlyView.
A circular upcycling strategy transforms waste poly(ethylene terephthalate) bottles into microwave‐responsive Ni@C catalyst featuring lattice‐distorted nickel cores and defective carbon shells. These strain‐rich heterointerfaces enhance dielectric loss and promote localized microwave hotspots, accelerating peroxymonosulfate activation and polymer‐chain
Xiao Lu, Shiying Ren, Jingkai Lin, Kunsheng Hu, Yalan Mo, Shaobin Wang, Wenjie Tian, Xiaoguang Duan   +7 more
wiley   +1 more source

Electrochemistry-assisted selective butadiene hydrogenation with water

Nature Communications, 2023
Alkene feedstocks are used to produce polymers with a market expected to reach 128.4 million metric tons by 2027. Butadiene is one of the impurities poisoning alkene polymerization catalysts and is usually removed by thermocatalytic selective ...
Yong-Qing Yan, Ya Chen, Zhao Wang, Li-Hua Chen, Hao-Lin Tang, Bao-Lian Su   +5 more
doaj   +1 more source