Kationische Titanocen(III)‐Komplexe für die Katalyse in Ein‐Elektronen‐Schritten

Gansäuer, Andreas; Hildebrandt, Sven; Michelmann, Antonius; Dahmen, Tobias; Laufenberg, Daniel von; Kube, Christian; Fianu, Godfred D.; Flowers, Robert A.

doi:10.1002/ange.201501955

Cited by 35 publications

(1 citation statement)

References 50 publications

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“…The investigation of photocatalysts suggested other organic fluorophores such as 4CzIPN, 4DPAIPN, and 5CzBN resulted in inferior yields of 3 aa (entries 2–4). Ti catalysts with either different counterions (Cp 2 TiBr 2 , Cp 2 Ti(OTf) 2 , Cp 2 Ti(OMs) 2 , and Cp 2 Ti(TFA) 2 ) [21e,g] or different ligands (Cp*TiCl 3 and Ti(O i ‐Pr) 4 ) afforded 3 aa in lower yields than Cp 2 TiCl 2 (entries 5–10). Reactions in THF and DMF did not work so well as that in DCE (entries 11 and 12).…”

Section: Resultsmentioning

confidence: 99%

Photoredox/Ti Dual‐Catalyzed Dehydroxylation of Cyclobutanone Oximes for γ‐Cyanoalkyl Radical Generation: Access to Cyanoalkyl‐Substituted Oxoindolines

Yuan

et al. 2022

Adv Synth Catal

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In this work, we have established a photoredox/Ti dual‐catalyzed dehydroxylation of cyclobutanone oximes. The resulting γ‐cyanoalkyl radicals undergo a cascade radical addition/cyclization with N‐acrylamides to afford cyanoalkyl substituted oxoindolines under mild conditions. This reaction also exhibits broad substrate scope and good functional group tolerance. Furthermore, it is applicable to late‐stage functionalization of complex molecules and gram‐scale synthesis, which illustrates its potential value in organic synthesis.

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Section: Resultsmentioning

confidence: 99%

Photoredox/Ti Dual‐Catalyzed Dehydroxylation of Cyclobutanone Oximes for γ‐Cyanoalkyl Radical Generation: Access to Cyanoalkyl‐Substituted Oxoindolines

Yuan

et al. 2022

Adv Synth Catal

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CV‐driven Optimization: Cobalt‐Catalyzed Electrochemical Expedient Oxychlorination of Alkenes via ORR

Tian

Jia

et al. 2019

Adv Synth Catal

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Instead of screening reaction conditions by yield-based chemical trial-and-error, potential-based cyclic voltammetry was alternatively employed for optimization of electrochemical oxychlorination of alkenes. With this unconventional screening method, the catalyst system including catalysts, molar ratio of chloride sources and solvents were identified in a rational, time-and energy-efficient manner. The optimal catalytic system in combination with oxygen reduction reaction enabled broad substrate scopes for the desired transformation by taking advantages of persistent radical effect. UV-vis and CV titration experiments confirmed the in-situ formed catalytic species [CoCl 5 ]. Moreover, cyclic voltammetry was applied to obtain mechanistic insights in our reaction system.

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Recent Advances in the Intramolecular Reactions of Epoxides with Arenes and Heteroarenes

Das

2016

Asian J Org Chem

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Over the years, the reactions and applications of epoxides have attracted the attention of many research groups. Intramolecular reactions of epoxides with arenes, termed epoxide-arene cyclizations (EACs) in this Focus Review,a re the intramolecular CÀCb ond-formingr eactions of arenesw ith tethered epoxides and represent ap articular type of epoxide-derivatization reactions. EACs have been successfully appliedt ot he synthesis of various benzo-fused carbo-and heterocyclesa sr eliable CÀCb ond-formingr eactions with complete atom economy.I nt his Focus Review,r esults in the literatures ince 2011o nt he development of EACs are presented.D ifferent aspects of substrate reactivities, the regio-and stereochemical outcomeso ft hese reactions, andtheir proposed mechanismsare discussed.Scheme1.Majorp athways for utilizingE ACs in the synthesis of benzo-fused carbo-and heterocycles.[a] Dr.The ORCID identification number(s) for the author(s) of this articlecan be found under http://dx.H is current research focuses on methodological advances in epoxide/aziridine chemistry and their applications in the synthesis of natural products and natural-product-like molecules.Scheme2.InCl 3 (10 mol %)-catalyzed synthesis of cis-2-hydroxyindenones through aFriedel-Crafts EAC reaction.

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Kationische Titanocen(III)‐Komplexe für die Katalyse in Ein‐Elektronen‐Schritten

Cited by 35 publications

References 50 publications

Photoredox/Ti Dual‐Catalyzed Dehydroxylation of Cyclobutanone Oximes for γ‐Cyanoalkyl Radical Generation: Access to Cyanoalkyl‐Substituted Oxoindolines

Photoredox/Ti Dual‐Catalyzed Dehydroxylation of Cyclobutanone Oximes for γ‐Cyanoalkyl Radical Generation: Access to Cyanoalkyl‐Substituted Oxoindolines

CV‐driven Optimization: Cobalt‐Catalyzed Electrochemical Expedient Oxychlorination of Alkenes via ORR

Recent Advances in the Intramolecular Reactions of Epoxides with Arenes and Heteroarenes

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