Results 101 to 110 of about 1,032 (168)

Chemo- and Regioselective Synthesis of Alkynyl Cyclobutanes by Visible Light Photocatalysis

, 2018
Here is the first visible light catalytic intermolecular cross [2 + 2] cycloaddition of enynes with alkenes to alkynyl cyclobutanes established with good functional group tolerance and high reaction efficiency and selectivity.
Tung, Chen-Ho, Wei, Xiang-Zhu, Xiang-Zhu Wei (5873561), Zhou, Chao, Chen-Ho Tung, Chen, Bin, Vaidhyanathan Ramamurthy, Zan Liu, Wu, Li-Zhu, Tao Lei (404218), Li-Zhu Wu (654284), Tao Lei, Li-Zhu Wu, Lei, Tao, Ramamurthy, Vaidhyanathan, Bin Chen, Chen-Ho Tung (654283), Chao Zhou, Chao Zhou (471522), Bin Chen (63682), Xiang-Zhu Wei, Zan Liu (580421), Vaidhyanathan Ramamurthy (1588078), Liu, Zan   +23 more
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SYNTHESIS OF CYCLOBUTANE ANALOGUES

Bulletin of the Chemical Society of Ethiopia, 2009
2-(3-Acetyl-2,2-dimethylcyclobutyl)acetic acid (pinonic acid) was synthesized using α-pinene as raw material and potassium permanganate as oxidant. This compound reacted with substituted aniline to produce eight kinds of derivatives with cyclobutane moiety. The yields of the cyclobutane analogues ranged from 24.9 to 78.2 %. KEY WORDS: Cyclobutane
Yan Bai Yin, Zhan Qian Song, Zong De Wang, Shi Bin Shang, Zhao Sheng Cai   +4 more
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Cyclobutanes [PDF]

Chemical & Engineering News Archive, 2014
openaire   +1 more source

Nuclear Magnetic Resonance Spectroscopy. Conformational Properties of Cyclobutanes. Variation of Geminal Fluorine—Fluorine Chemical-Shift Differences with Temperature

, 1965
The temperature dependence of the geminal fluorine-fluorine chemical-shift differences in a variety of unsymmetrically substituted cyclobutanes is interpreted in terms of a classical equilibrium between axial and equatorial conformations.
Roberts, John D., Lambert, Joseph B.
core  

Palladium-Catalyzed Alkene Difunctionalization to Form Methylene Cyclobutanes, Methylene Cyclopentanes, and Tetrahydroberberines

Carbocycles and heterocycles are highly valuable synthetic building blocks, especially when they incorporate functional handles, such as amines. Palladium-catalyzed alkene difunctionalization is a mild and versatile method for the construction of these ...
Hatt, Jessica
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The crystal structure of high cyclobutane [PDF]

Acta Crystallographica, 1953
Carter, Giles F., Templeton, D.H.
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NMR and computational studies on the reactions of enamines with nitroalkenes that may pass through cyclobutanes

The addition of aldehyde enamines to nitroalkenes affords cyclobutanes in all solvents, with all of the pyrrolidine and proline derivatives tested by us and with all of the substrates we have examined. Depending on the temperature, concentration of water,
Castro Álvarez, Alejandro, Vilarrasa i Llorens, Jaume, Carneros, Héctor, Calafat, Jaume, Costa i Arnau, Anna M., Marco Correas, Cristian   +5 more
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CF3‑Cyclobutanes: Synthesis, Properties, and Evaluation as a Unique tert-Butyl Group Analogue

JACS Au
Volodymyr Ahunovych, Anton A. Klipkov, Maksym Bugera, Karen Tarasenko, Serhii Trofymchuk, Bohdan Razhyk, Andrii Boretskyi, Oleh Stanko, Yaroslav Panasiuk, Oleh Shablykin, Galeb Al-Maali, Dmytro Lesyk, Oleksii Klymenko-Ulianov, Kateryna Horbatok, Iryna Bodenchuk, Viktoriia Kosach, Petro Borysko, Vladimir Kubyshkin, Pavel K. Mykhailiuk   +18 more
doaj   +1 more source

Cyclobutanes prove charlatans [PDF]

Nature Chemical Biology, 2012
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New Fluorinated Cyclobutanes [PDF]

Chemical & Engineering News Archive, 2013
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