2016
DOI: 10.1002/chem.201601000
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Eosin Y (EY) Photoredox‐Catalyzed Sulfonylation of Alkenes: Scope and Mechanism

Abstract: Alkyl- and aryl vinyl sulfones were obtained by eosin Y (EY)-mediated visible-light photooxidation of sulfinate salts and the reaction of the resulting S-centered radicals with alkenes. Optimized reaction conditions, the sulfinate and alkene scope, and X-ray structural analyses of several reaction products are provided. A detailed spectroscopic study explains the reaction mechanism, which proceeds through the EY radical cation as key intermediate oxidizing the sulfinate salts.

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Cited by 127 publications
(96 citation statements)
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“…[11] Several organic molecules have proven successful as visible light PCs for small molecule and polymeric transformations. [12] The majority of these organic PCs, such as Eosin Y, [13] rhodamine dyes, [14] acridinium salts, [15] perylene diimides, [16] and carbazolyls [17] are excited state oxidants and operate through a reductive quenching cycle. Although a few strongly reducing organic PCs exist, [18] many do not absorb visible light.…”
mentioning
confidence: 99%
“…[11] Several organic molecules have proven successful as visible light PCs for small molecule and polymeric transformations. [12] The majority of these organic PCs, such as Eosin Y, [13] rhodamine dyes, [14] acridinium salts, [15] perylene diimides, [16] and carbazolyls [17] are excited state oxidants and operate through a reductive quenching cycle. Although a few strongly reducing organic PCs exist, [18] many do not absorb visible light.…”
mentioning
confidence: 99%
“…Our group reported the visible‐light‐mediated sulfonylation of alkenes (Scheme ) . The method employed commercially available Eosin Y as photocatalyst as well as nitrobenzene and O 2 from air as oxidants.…”
Section: C–s Bondmentioning
confidence: 99%
“…[124] Die gleichen radikalischen Intermediate entstehen bei der Photoreduktion von Sulfonylchloriden (siehe ATRA, Abschnitt 7.3.2). [125] Mit einem ähnlichen photokatalytischen System entwickelte Wang eine Difunktionalisierung von Alkinen (siehe SI, Schema S9). In einem zweiten Bericht erweiterten sie den Anwendungsbereich der Reaktion auf primäre und sekundäre alkylsubstituierte und heteroarylsubstituierte Sulfone mit guten Ergebnissen (Schema 35 b).…”
Section: C-s-bindungsbildungunclassified