2019
DOI: 10.1021/acs.joc.9b01646
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Construction of Sulfonyl Phthalides via Copper-Catalyzed Oxysulfonylation of 2-Vinylbenzoic Acids with Sodium Sulfinates

Abstract: Copper-catalyzed difunctionalization of 2-vinylbenzoic acids with sodium sulfinates to construct substituted lactones has been realized. This protocol employs inexpensive CuCl2 as the catalyst, di-tert-butyl peroxide or O2 as the terminal oxidant, and readily available sodium sulfinates as sulfonylation reagents. High functional group tolerance and excellent yields were demonstrated by the efficient preparation of a wide range of γ-sulfonylated phthalides.

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Cited by 30 publications
(22 citation statements)
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“…[261] Copper-catalyzed difunctionalization of 2-vinylbenzoic acids with sodium sulfinates using DTBP or oxygen as the oxidizing agent also gave sulfonylmethyl-substituted lactones. [262] Polysubstituted furans 485 were synthesized via the addition of sodium sulfinates 483 to cyclopropylidene-propenones 482, followed by I 2 -mediated 5-endo-trig cyclization of the resulting adduct 484 (Scheme 211). The process was also carried out in one-pot mode.…”
Section: Construction Of Five-membered Heterocyclesmentioning
confidence: 99%
“…[261] Copper-catalyzed difunctionalization of 2-vinylbenzoic acids with sodium sulfinates using DTBP or oxygen as the oxidizing agent also gave sulfonylmethyl-substituted lactones. [262] Polysubstituted furans 485 were synthesized via the addition of sodium sulfinates 483 to cyclopropylidene-propenones 482, followed by I 2 -mediated 5-endo-trig cyclization of the resulting adduct 484 (Scheme 211). The process was also carried out in one-pot mode.…”
Section: Construction Of Five-membered Heterocyclesmentioning
confidence: 99%
“…The copper-catalyzed difunctionalization of 2-vinylbenzoic acids with sodium sulfinates to construct substituted lactones was reported by Lu group. [15] In this transformation, DTBP or O 2 was used as oxidant to release sulfonyl radical from sodium sulfinate. This reaction exhibited excellent functional group tolerance, high atom economy and high efficiency.…”
Section: Sulfonylation/cyclization With Alkenesmentioning
confidence: 99%
“…24 Sulfonated -lactones derivatives were also synthesized by Weng, Lu, and co-workers by the Cu-catalyzed oxysulfonylation of 2-vinylbenzoic acids with sodium sulfinates employing CuCl 2 as the catalyst and di-tert-butyl peroxide or O 2 as the terminal oxidant (Scheme 13). 25…”
Section: Scheme 12 Cu-mediated Difunctionalization Unsaturated Carboxmentioning
confidence: 99%