Oxysulfonylation of alkynes
WebOxy-sulfonylation of terminal alkynes via C–S coupling enabled by copper photoredox catalysis † V. Kishore Kumar Pampana, a Vaibhav Pramod Charpe,a Arunachalam Sagadevan, a Deb Kumar Das, a Chun-Cheng Lin, a Jih Ru Hwu a and Kuo Chu Hwang *a Author affiliations Abstract WebA highly efficient visible light-induced regioselective and stereoselective oxysulfonylation of alkynes with arylsulfonate phenol esters has been developed.
Oxysulfonylation of alkynes
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WebFeb 22, 2024 · Abstract. A practical and efficient electrochemical intramolecular amino- or oxysulfonylation of internal alkenes equipped with pendant nitrogen or oxygen-centered … WebJan 11, 2024 · The intermediates, β-keto sulfones, generated from an aerobic oxysulfonylation of terminal alkynes and sodium sulfinates catalyzed by an iron salt in MeOH/H 2 O (v : v = 3 : 1) at 50 °C, were subsequently reduced by a Ru-catalyzed asymmetric transfer hydrogenation with HCOONa as a hydrogen source.
WebApr 15, 2024 · Recently, radical-based sulfonylations of alkynes with different sulfonyl precursors have emerged as efficient solutions for preparing β-keto sulfones because of their elegant atom economy and step economy (Handa et al. 2014; Lu et al. 2013; Mei et al. 2024; Ni et al. 2024; Pampana et al. 2024; Reddy and Kumari 2024 ). WebOct 1, 2024 · A variety of functionalized β-keto sulfones were smoothly prepared through oxysulfonylation of commercially available alkynes with sulfonylhydrazides under the synergistic interactions of visible ...
WebHere we report the first example of sulfinylsulfonation of alkynes to afford β-sulfinyl alkenylsulfone products with a broad substrate scope, excellent functional group … WebMay 23, 2013 · New channel! A novel and attractive dioxygen activation by sulfinic acids was explored that is capable of performing efficiently without the assistance of transition metals or radical initiators. Thi...
WebApr 23, 2014 · As evident from the table, aryl alkynes proved to be excellent substrates for the aerobic oxysulfonylation. Both electron-rich (R = Me or OMe) and electron-poor (R = Br, …
WebJun 1, 2024 · The oxysulfonylation of alkenes or alkynes appeared as an easy alternative for the synthesis of β-keto-sulfones. The oxysulfonylation is based on the reaction of alkenes or alkynes with... brightscope alpha grinderWebJul 9, 2024 · (A) Substrate scope for asymmetric oxysulfonylation of terminal alkenes. Reactions were conducted on 0.2 mmol scale, isolated yields were given, and er values were determined by HPLC analysis. (B) Transformation of the oxysulfonylation product. In the following study, we switched our attention to evaluate the scope of sulfonyl chlorides. can you have cold sores without having herpesWebThe combination of 4-substituted pent-4-en-1-ols, DABCO· (SO 2) 2, and aryldiazonium tetrafluoroborates under mild conditions in the presence of a photocatalyst provides sulfonated 2,2-disubstituted tetrahydrofurans in moderate to good yields. brightscope investment groupWebJul 30, 2024 · Herein, we report a novel heterogeneous photocatalyst for radical-mediated oxidative oxysulfonylation of alkynes to β-keto sulfones under environmentally benign … brightscope fiduciary retirement plan articleWebApr 12, 2024 · A variety of aryl and alkyl sulfinates were converted to the corresponding sulfones with good yields. In particular, the heterogeneous catalyst could be recovered easily after the synthesis and consecutively used at least five times with no appreciable decrease in the catalytic activity. brightscope.com 5500WebSep 1, 2024 · An efficient electrochemical oxidative selenosulfonylation of alkynes and oxysulfonylation of alkenes without the use of metal catalysts has been reported. Discover the world's research. brightscope contact phone numberWebNov 11, 2013 · The first copper-catalyzed oxysulfonylation reaction of alkenes with dioxygen and sulfonylhydrazides for the construction of β-ketosulfones has been developed under mild conditions without any ligand or additive. brightscope address