2014
DOI: 10.1002/anie.201401062
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Acid‐Catalyzed Oxidative Radical Addition of Ketones to Olefins

Abstract: Based on a mechanistic study, we have discovered a Brønsted acid catalyzed formation of ketone radicals. This is believed to proceed via thermally labile alkenyl peroxides formed in situ from ketones and hydroperoxides. The discovery could be utilized to develop a multicomponent radical addition of unactivated ketones and tert-butyl hydroperoxide to olefins. The resulting γ-peroxyketones are synthetically useful intermediates that can be further transformed into 1,4-diketones, homoaldol products, and alkyl ket… Show more

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Cited by 149 publications
(79 citation statements)
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“…In einer analogen Sequenz kçnnen a-Keto-Radikale mit Alkenen zu g-tert-Butylperoxylketonen als Produkte umgesetzt werden. [56] Die selektive Kreuzkupplung von Peroxyl-Radikalen wurde auch als Schlüsselschritt in einer ähnlichen Sequenz mit Alkoholen, [57] Ethern [58] und Nitroalkanen [59] eingesetzt. Außerdem wurden in diesem Zusammenhang komplexere Kaskaden entwickelt.…”
Section: Alkyl-peroxideunclassified
“…In einer analogen Sequenz kçnnen a-Keto-Radikale mit Alkenen zu g-tert-Butylperoxylketonen als Produkte umgesetzt werden. [56] Die selektive Kreuzkupplung von Peroxyl-Radikalen wurde auch als Schlüsselschritt in einer ähnlichen Sequenz mit Alkoholen, [57] Ethern [58] und Nitroalkanen [59] eingesetzt. Außerdem wurden in diesem Zusammenhang komplexere Kaskaden entwickelt.…”
Section: Alkyl-peroxideunclassified
“…Remarkably, this method could also be used in direct modification of complex molecules (Scheme 14). [39] It was proposed that during the reaction course, the singleelectron oxidation of acetone with the Ag III ÀFi ntermediate [38] gives rise to an acetonyl radical cation [40] and an Ag II ÀFi ntermediate (Scheme 15). The subsequentd eprotonation of the acetonyl radicalc ation affords an electrophilicc arbonyl radical, which further reacts with unactivated alkenes to give another alkyl radical.…”
Section: Radical Carbofluorination Of Alkenesmentioning
confidence: 99%
“…10 In 2014, Klussmann group discovered that under a Brønsted acid catalyzed conditions, ketone radicals could be utilized to develop a multicomponent radical addition of tert-butyl hydroperoxide (TBHP) to olefins (Scheme 1-a). 11 Herein, we envisioned that this metal-free catalytic conditions can realize cascade radical addition/cyclization of arylacrylamides with ketones to obtain oxindoles derivatives (Scheme 1-b).…”
Section: Introductionmentioning
confidence: 99%