2015
DOI: 10.1021/jacs.5b06494
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Synthetic and Predictive Approach to Unsymmetrical Biphenols by Iron-Catalyzed Chelated Radical–Anion Oxidative Coupling

Abstract: An iron-catalyzed oxidative unsymmetrical biphenol coupling in 1,1,1,3,3,3-hexafluoropropan-2-ol that proceeds via a chelated radical-anion coupling mechanism was developed. Based on mechanistic studies, electrochemical methods, and density functional theory calculations, we suggest a general model that enables prediction of the feasibility of cross-coupling for a given pair of phenols.

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Cited by 169 publications
(133 citation statements)
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“…The principle behind this finding plays a vital role in determining the selectivity of radical–radical coupling reactions. Two reactivity indices that were introduced by Domingo and co-workers for free radicals, the global electrophilicity ω ° and global nucleophilicity N °62, have been used to clarify the origin of the selectivity in this work (Table 1)697071, and a graphic illustration for the cross-coupling selectivity is also provided based on these data (Fig. 12).…”
Section: Resultsmentioning
confidence: 99%
“…The principle behind this finding plays a vital role in determining the selectivity of radical–radical coupling reactions. Two reactivity indices that were introduced by Domingo and co-workers for free radicals, the global electrophilicity ω ° and global nucleophilicity N °62, have been used to clarify the origin of the selectivity in this work (Table 1)697071, and a graphic illustration for the cross-coupling selectivity is also provided based on these data (Fig. 12).…”
Section: Resultsmentioning
confidence: 99%
“…[16d, 17b, 18] Often fluorinated alcohols interfere with the catalytic cycle and positively affect the kinetic profile of polar reactions, significantly improving their efficiency [18,19] and selectivity. [20] With the notion that fluorinated alcohols can act as solvent-assisted selectivity in oxidation processes, we studied the autoxidation of methylarene by using the NHPI/Co(OAc) 2 catalytic system in HFIP.…”
mentioning
confidence: 99%
“…[19] Jeganmohan and co-workers also described an oxidative cross-coupling of two different phenols using K 2 S 2 O 8 and Bu 4 N + HSO 3 À (10 mol %) in CF 3 COOH. [20] More recently,t he iron-catalyzed oxidative cross-coupling reaction of two different phenols was achieved by the group of Pappo, [21] in which the cross-coupling selectivities of two different phenols are nicely controlled.…”
Section: Methodsmentioning
confidence: 99%