Results 171 to 180 of about 24,842 (217)
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Journal of Organic Chemistry, 2019
A stereo- and regioselective 1,3-dipolar cycloaddition of the stable ninhydrin-derived azomethine ylide [2-(3,4-dihydro-2 H-pyrrolium-1-yl)-1-oxo-1 H-inden-3-olate, DHPO] to differently substituted cyclopropenes has been established.
A. Filatov +6 more
semanticscholar +1 more source
A stereo- and regioselective 1,3-dipolar cycloaddition of the stable ninhydrin-derived azomethine ylide [2-(3,4-dihydro-2 H-pyrrolium-1-yl)-1-oxo-1 H-inden-3-olate, DHPO] to differently substituted cyclopropenes has been established.
A. Filatov +6 more
semanticscholar +1 more source
1994
Von Huisgen 1,2) wurde 1963 die 1,3-dipolare Cycloaddition 3–5) als Reaktionsprinzip zum Aufbau von Heterocyclen systematisiert. Man versteht darunter die Addition eines 1,3-Dipols 1, der aus den verschiedenen Kombinationen von Kohlenstoff-, Stickstoff- und Sauerstoffatomen bestehen kann und vier nicht dienische π-Elektronen umfast, an eine ...
Thomas Laue, Andreas Plagens
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Von Huisgen 1,2) wurde 1963 die 1,3-dipolare Cycloaddition 3–5) als Reaktionsprinzip zum Aufbau von Heterocyclen systematisiert. Man versteht darunter die Addition eines 1,3-Dipols 1, der aus den verschiedenen Kombinationen von Kohlenstoff-, Stickstoff- und Sauerstoffatomen bestehen kann und vier nicht dienische π-Elektronen umfast, an eine ...
Thomas Laue, Andreas Plagens
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ChemInform Abstract: 1,3‐Dipolar Cycloadditions to Oxidopyraziniums.
ChemInform, 1987Abstract 1,5-Dimethyl-3-oxidopyrazinium (6) undergoes cycloadditions with methyl acrylate, acrylonitrile, diethyl maleate, maleimide, methyl propiolate and diethyl acetylenedicarboxylate.
Miklos Kiss +2 more
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Transition Metal Complexation in 1,3-Dipolar Cycloadditions
HETEROCYCLES, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
BROGGINI, GIANLUIGI +3 more
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Organic Letters, 2015
Electron-deficient ynamides, possessing an ynoate or an ynone moiety, have been successfully involved for the first time in a 1,3-dipolar cycloaddition with stabilized pyridinium ylides.
Julien Brioche, C. Meyer, J. Cossy
semanticscholar +1 more source
Electron-deficient ynamides, possessing an ynoate or an ynone moiety, have been successfully involved for the first time in a 1,3-dipolar cycloaddition with stabilized pyridinium ylides.
Julien Brioche, C. Meyer, J. Cossy
semanticscholar +1 more source
Journal of Organic Chemistry, 2018
A novel synthetic strategy employing benzyne and azomethine ylides for the construction of spiro[oxindole-3,2'-pyrrolidine] derivatives has been achieved in good yields.
Heesun Ryu, J. Seo, H. Ko
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A novel synthetic strategy employing benzyne and azomethine ylides for the construction of spiro[oxindole-3,2'-pyrrolidine] derivatives has been achieved in good yields.
Heesun Ryu, J. Seo, H. Ko
semanticscholar +1 more source
Distortion/interaction energy control of 1,3-dipolar cycloaddition reactivity.
Journal of the American Chemical Society, 2007Computations of activation barriers and reaction energies for 1,3-dipolar cycloadditions by a high-accuracy quantum mechanical method (CBS-QB3) now reveal previously unrecognized quantitative trends in activation barriers.
D. Ess, K. Houk
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Asymmetric 1,3-dipolar cycloadditions
Tetrahedron, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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Chiral ScIII-N,N'-Dioxide-Catalyzed 1,3-Dipolar Cycloaddition of Diaziridines with Chalcones.
Organic Letters, 2019A highly enantioselective 1,3-dipolar cycloaddition of meso-diaziridines with chalcones was realized by utilizing the ScIII-N,N'-dioxide complex as the catalyst. In this transformation, the 1,3-dipole intermediates generated from the C-N bond cleavage of
Haipeng Hu +5 more
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Boryl Azides in 1,3-Dipolar Cycloadditions
The Journal of Organic Chemistry, 2014The 1,3-dipolar cycloaddition reaction of boron azides with alkynes has been investigated experimentally and computationally. At room temperature pinBN3 (pin = pinacolato) reacts with the strained triple bond of cyclooctyne with formation of an oligomeric boryl triazole.
Holger F. Bettinger +2 more
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