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Volumn 133, Issue 35, 2011, Pages 13984-14001

Experimental investigation on the mechanism of chelation-assisted, copper(II) acetate-accelerated azide-alkyne cycloaddition

Author keywords

[No Author keywords available]

Indexed keywords

ACETYLIDES; AZIDE-ALKYNE CYCLOADDITION; AZIDO GROUP; CATALYTIC CYCLES; CATALYTIC PATHWAYS; CATALYTIC REACTIONS; COMPUTATIONAL RESULTS; COPPER (II); COPPER CENTERS; COPPER IONS; DIFFERENT SOLVENTS; DINUCLEAR COPPER; EFFICIENT CATALYSTS; ELECTROPHILICITY; EXPERIMENTAL INVESTIGATIONS; HIGH REACTIVITY; INDIVIDUAL COMPONENTS; KINETIC BEHAVIOR; KINETIC ORDER; KINETIC STUDY; LEWIS ACID; MECHANISTIC MODELS; METAL COORDINATION; METALLACYCLES; METHANOL OXIDATION; MIXED VALENCY; ORGANIC AZIDES; OXIDATION STATE; OXIDATIVE HOMOCOUPLING; PREMIXING; REACTION PROGRESS; SOLVENT KINETICS; X RAY CRYSTAL STRUCTURES;

EID: 80052309777     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja203733q     Document Type: Article
Times cited : (161)

References (84)
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    • "Pre-equilibrium coordination of organic azide to Cu may be important..." was noted in the following reference: Rodionov, V. O.; Presolski, S. I.; Díaz, D. D.; Fokin, V. V.; Finn, M. G. J. Am. Chem. Soc. 2007, 129, 12705-12712
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    • Copper(II)/copper(I) redox equilibrium is dependent on other redox couple(s) in the reaction mixture. Therefore, there is always a certain level of copper(I) presence under any circumstance. For example, in water, copper(I) may exist at ppb level per mole of copper(II) as estimated using the Nerst equation. An extremely low level of copper(I) salt may indeed do wonders. Buchwald, S. L.; Bolm, C. Angew. Chem., Int. Ed. 2009, 48, 5586. However, the reactivity that we observed under the copper(II)-promoted conditions that is comparable to or even higher than those under the typical copper(I)-catalyzed conditions cannot be simply explained by the extremely high reactivity of a miniscule amount of copper(I) contaminant. Furthermore, we and others have presented evidence for the transformation of copper(II) to copper(I) over the course of a copper(II)-accelerated CuAAC reaction
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    • The details of this step remain unclear. On the basis of the suggestion by Stahl et al. that a copper(III) acetylide be involved, we envision that structure III may undergo disproportionation (or electron transfer) to afford transient copper(III) and copper(I) acetylides, which subsequently couple to afford a diyne and two copper(I) centers. See: King, A. E.; Huffman, L. M.; Casitas, A.; Costas, M.; Ribas, X.; Stahl, S. S. J. Am. Chem. Soc. 2010, 132, 12068-12073
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.