Results 161 to 170 of about 7,762 (177)
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ChemInform Abstract: 1,3‐Dipolar Cycloaddition Reactions of Levoglucosenone.
ChemInform, 1992AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Alexander J. Blake +4 more
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ChemInform Abstract: 1,3‐Dipolar Cycloaddition Reactions of Benzylidenecyanoamines.
Chemischer Informationsdienst, 1982AbstractEinige inter und intramolekulare Cycloadditionsreaktionen der Benzylidencyanobenzylamine (I) werden beschrieben.
Kazunori Ueno, Otohiko Tsuge
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Intramolecular 1,3‐Dipolar Cycloaddition Reactions
Angewandte Chemie International Edition in English, 1976AbstractThe intramolecular 1,3‐dipolar cycloaddition reaction of suitably functionalized 1,3‐dipoles represents a general scheme for the synthesis of novel fused ring heterocycles. Such reactions of a number of 1,3‐dipoles are summarized and the general outline and potential analogies for these reactions noted. While the immediate aim of this review is
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1,3‐Dipolar cycloadditions to alkyldicyanamides
Recueil des Travaux Chimiques des Pays-Bas, 1981AbstractThe 1,3‐dipoles 2,4,6‐trimethylbenzonitrile oxide and benzyl azide react with alkyldicyanamides (1) to give the 3,5‐disubstituted 1,2,4‐oxadiazoles 2 and the 1,5‐disubstituted tetrazole 4, respectively, by (3 + 2)‐cycloaddition. The structure of 4 has been determined by a single crystal X‐ray analysis.
D. M. W. van den Ham +2 more
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ChemInform Abstract: 1,3‐Dipolar Cycloadditions to Nitrogen‐Substituted Allenes.
ChemInform, 1990AbstractOn reaction with the nitrile oxide (II) the title compounds (I) (8 examples) form the monoadducts (III)‐(V) and the diadduct (VI).
BROGGINI, GIANLUIGI +3 more
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The Reactivity of Addends in the 1,3-Dipolar Cycloaddition Reaction
Russian Chemical Reviews, 1984The influence of donor-acceptor interactions and localisation energies on the reactivity of addends in the 1,3-dipolar cycloaddition reaction is examined. It is shown that the interactions between the symmetric frontier orbitals and between the antisymmetric frontier orbitals are qualitatively different in (4π+2π)-cycloaddition reactions.
Samuilov Y., Konovalov A.
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Concertedness of 1,3-dipolar cycloadditions
Journal of Chemical Education, 1984The 1,3-dipolar cycloaddition is the union of a 1,3-dipole with a multiple bond system (a dipolarophile) to form a five-membered ring; the process is regarded as one of the most general methods for the synthesis of five-membered heterocycles.
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Toward the Briarane Core via 1,3-Dipolar Cycloaddition
Organic LettersThe complete C20 framework of brianthein W was established, featuring hydroboration/allylation, to provide the C1-C2 quaternary/tertiary stereoarray with excellent stereocontrol. Intramolecular nitrile oxide cycloaddition (INOC) was adopted as the key transformation to establish the trans-fused 6/10-bicyclic ring system.
Yichen Liu, Jiangang Zhao, Ran Hong
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1,3-dipolar cycloadditions with porphyrins
2001The objective of this work is to use 1,3-dipolar cycloadditions to synthesize novel aromatic compounds based on meso-phenyl substituted porphyrins. These compounds are potential photosensitizers for use in photodynamic therapy. Tetraphenylporphyrins with a variety of substituents were reacted with selected 1,3-dipoles.
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