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Oxysulfonylation of alkynes

WebWe report here in an efficient electrochemical oxidative selenosulfonylation of alkynes and oxysulfonylation of alkenes without use of metal catalysts. This method provides a practical access to a wide range of β-(seleno)vinyl sulfones and β-keto sulfones. These reactions can tolerate various functional groups and be easily scaled-up. 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...

Electrochemical Oxidation‐induced Difunctionalization of …

WebJul 26, 2016 · Visible light along with 1 mol% eosin Y catalyzed the direct oxysulfonylation of alkenes with sulfinic acids via a photoredox process which has been developed at room temperature under transition-metal-free conditions. The present reaction provides a highly efficient approach to diverse β-ketosulfones in mod WebThe 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. marion county gun permit application https://anthonyneff.com

Oxy-sulfonylation of terminal alkynes via C–S coupling enabled by ...

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... WebNov 25, 2024 · As a yolk-shell-structured bifunctional magnet catalyst, the FeCl 3 species enables an efficient aerobic oxysulfonylation between aryl-substituted terminal alkynes and sodium sulfinates to the β-keto sulfones intermediates, and the ruthenium/diamine species sequentially reduces the in-situ generated intermediate to the chiral β ... 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, … naturlandhof braun pegnitz

A Compartmentalized‐type Bifunctional Magnetic Catalyst for …

Category:Diastereo- and Enantioselective Catalytic Radical Oxysulfonylation of …

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Oxysulfonylation of alkynes

Electrochemical Oxidation‐induced Difunctionalization of Alkynes …

WebSep 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. WebMay 4, 2016 · A variety of functionalized β-keto sulfones were smoothly prepared through oxysulfonylation of commercially available alkynes with sulfonylhydrazides under the synergistic interactions of visible light irradiation, Ru(bpy)3Cl2 photocatalyst, oxygen, KI, and NaOAc basic additive under very mild react …

Oxysulfonylation of alkynes

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WebJul 8, 2013 · Aerobic oxysulfonylation of alkenes leading to secondary and tertiary β-hydroxysulfones. Angew Chem Int Ed Engl. 2013 Jul 8;52 (28):7156-9. doi: 10.1002/anie.201301634. 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 ...

WebA highly efficient visible light-induced regioselective and stereoselective oxysulfonylation of alkynes with arylsulfonate phenol esters has been developed. WebOxy-sulfonylation of terminal alkynes. via. C–S coupling enabled by copper photoredox catalysis. †. V. Kishore Kumar Pampana, a Vaibhav Pramod Charpe,a Arunachalam …

WebFeb 4, 2024 · A highly enantioselective synthesis of β-hydroxysulfones from inexpensive and readily available alkynes via a consecutive one-pot reaction in MeOH/H2O under mild … WebIron Halide-Mediated Regio- and Stereoselective Halosulfonylation of Terminal Alkynes with Sulfonylhydrazides: Synthesis of (E)-β-Chloro and Bromo Vinylsulfones. The Journal of …

WebJan 2, 2024 · Among them, the oxidative difunctionalization of alkynes with various sulfonylating agents such as sulfinic acids, sulfinates, and sulfonylhydrazides have attracted the increasingly synthetic attention of chemists due to the diversity and commercial availability of alkynes [9].

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 naturlandhof heiglWebNov 11, 2013 · Abstract. The first copper-catalyzed oxysulfonylation reaction of alkenes with dioxygen and sulfonylhydrazides for the construction of β-ketosulfones has been … marion county gun permit officeWebJul 30, 2024 · The oxygen vacancy-rich semiconductor Nb 2 O 5 (labeled as OVs-N-Nb 2 O 5) could efficiently catalyze a wide range of alkynes, especially for those bearing electron-deficient substituents or internal alkynes, to their corresponding β-keto sulfones in good to high yields with good tolerance of diverse functional groups under visible-light … marion county habitat for humanityWebJan 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. marion county handicap parking permitWebApr 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 ). marion county ham daysnaturlandhof froschhammer thalmassingWebApr 15, 2024 · Substrate scope for reaction of alkynyl carboxylic acids with various sulfinates. Reaction conditions: unless otherwise specified, all reactions were carried out … naturlandhof froschhammer