Results 1 to 10 of about 157,130 (323)

η⁶‐Metalated Aryl Iodides in Diels‐Alder Cycloaddition Reactions: Mode of Activation and Catalysis [PDF]

, 2022
Susana Portela, Israel Fernández
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Computational and Spectral Investigation of 5,12-Dihydro-5,12-ethanonaphthacene-13-carbaldehyde

Molecules, 2011
A conformational search of 5,12-dihydro-5,12-ethanonaphthacene-13-carbaldehyde predicted the presence of twelve conformations. The geometry of the twelve conformations established at the B3LYP/6-31G* level showed only six unique ones.
Abdulrahman I. Almansour, Adel A. El-Azhary, Usama Karama, Mohammed H. Jaafar, Turki M. Al-Turki, Abdulla A. Al-Kahtani   +5 more
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Enantioselective cycloaddition reactions

ChemInform, 1991
Publisher Summary This chapter reviews the cycloadditions reactions because they are popular, widely used, and also constitutes enormous body of chemistry. The chapter focuses on the landmark achievements as well as state-of-the-art examples of relevant chemistry.
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Cycloadditions as a Sweet Route to ‘Double C-Glycosylation’

Biomolecules
Pharmaceuticals, such as the antibiotic erythromycin, and sodium-dependent glucose transporter (SGLT1 & SGTL2) inhibitors such as Bexagliflozin (diabetes) and Sotagliflozin (heart disease), are often sugar-decorated (glycosylated). Glycosylation is a key
Kevin P. P. Mahoney, Rosemary Lynch, Rhea T. Bown, Sunil V. Sharma, Piyasiri Chueakwon, G. Richard Stephenson, David B. Cordes, Alexandra M. Z. Slawin, Rebecca J. M. Goss   +8 more
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Synthesis of aryl-1H-1,2,3-triazoles via 1,3-dipolar cycloaddition

Orbital: The Electronic Journal of Chemistry, 2012
A series of Aryl-1H-1,2,3-triazoles were prepared from the reaction between aril-azide (1) with 1.5 equiv. of terminal alkynes (2a-o). The reactions carried out at room temperature and in the presence of CuI (10 mol%) in acetonitrile. The compounds (3a-o)
Wagner O. Valença, Jucleiton José R. de Freitas, Ronaldo N. de Oliveira   +2 more
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Optimized CO2 Cycloaddition to Epichlorohydrin Catalyzed by Ionic Liquid with Microwave and Ultrasonic Irradiation

International Journal of Technology
The capture, storage, and conversion of anthropogenic carbon dioxide (CO2) is one of the urgent environmental challenges. Among the various methods available, direct conversion is the most preferable.
Maria Atlaskina, Zakhar Markin, Kirill Smorodin, Sergey Kryuchkov, Nikita Tsivkovsky, Anton Petukhov, Artem Atlaskin, Olga Kazarina, Andrey Vorotyntsev, Ilya Vorotyntsev   +9 more
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Syntheses and crystal structures of [IrIII{C(CHCO2Et)(dppm)2-κ4P,C,C′,P′}ClH]Cl·2.75CH2Cl2 and its derivatives, [IrIII{C(CHCO2Et)(dppm)2-κ4P,C,C′,P′}(CH2CO2Et)Cl]Cl·CH3OH·0.5H2O, [IrIII{C(CHCO2Et)(dppm)2-κ4P,C,C′,P′}Cl2]Cl·CH3OH·2H2O and [IrIII{C(CHCO2Et)(dppm)2-κ4P,C,C′,P′}(CH2CO2Et)(CO)]Cl2·2CH2Cl2·1.5H2O

Acta Crystallographica Section E: Crystallographic Communications, 2019
The common feature of the four iridium(III) salt complexes, (bis{[(diphenylphosphanyl)methyl]diphenylphosphanylidene}(ethoxyoxoethanylidene)methane-κ4P,C,C′,P′)chloridohydridoiridium(III) chloride methylene chloride 2.75-solvate (4), (bis ...
Inge Schlapp-Hackl, Christoph Falschlunger, Kathrin Zauner, Walter Schuh, Holger Kopacka, Klaus Wurst, Paul Peringer   +6 more
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Synthesis of Anthraquinones by Iridium-Catalyzed [2 + 2 + 2] Cycloaddition of a 1,2-Bis(propiolyl)benzene Derivative with Alkynes

Inorganics, 2019
[2 + 2 + 2] cycloaddition of a 1,2-bis(propiolyl)benzene derivative with terminal and internal alkynes takes place in the presence of [Ir(cod)Cl]2 (cod = 1,5-cyclooctadiene) combined with bis(diphenylphosphino)ethane (DPPE) to give anthraquinones in 42 ...
Takahiro Sawano, Yuko Toyoshima, Ryo Takeuchi   +2 more
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Application of chiral 2-isoxazoline for the synthesis of syn-1,3-diol analogs

Beilstein Journal of Organic Chemistry, 2019
The asymmetric cycloaddition of TIPS nitronate catalyzed by “Cu(II)-bisoxazoline” gave the 2-isoxazoline product in 95% yield, which was converted into tert-butyl (3S,5R)-6-hydroxy-3,5-O-isopropylidene-3,5-dihydroxyhexanoate in 14 steps through a β ...
Juanjuan Feng, Tianyu Li, Jiaxin Zhang, Peng Jiao   +3 more
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Catalytic cycloaddition of acrylates to norbornadiene. Kinetics and mechanism

Тонкие химические технологии, 2010
Kinetics of [2+2+2]-cycloaddition of acrylates to norbornadiene in the presence of η3-bis(allyl) nickel was studied. The thermodynamic parameters were determined. Kinetics equations for all of the isomer reaction products were found.
I. E. Efros, O. A. Nikityuk, D. V. Dmitriev, V. R. Flid   +3 more
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