Tools of Green Synthesis: Electrochemistry DOI
Elisabeth K. Oehl,

Marola S. Lenhard,

Siegfried R. Waldvogel

et al.

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

Sodium alginate/sodium lignosulfonate hydrogel based on inert Ca2+ activation for water conservation and growth promotion DOI
Xinrui Zhang,

Lifei Yang,

Weicong Wang

et al.

Environmental Research, Journal Year: 2024, Volume and Issue: 246, P. 118144 - 118144

Published: Jan. 6, 2024

Language: Английский

Citations

16

Synthesis and Applications of Periodate for Fine Chemicals and Important Pharmaceuticals DOI Creative Commons
Sebastian Arndt, Philipp J. Kohlpaintner, Kai Donsbach

et al.

Organic Process Research & Development, Journal Year: 2022, Volume and Issue: 26(9), P. 2564 - 2613

Published: Sept. 1, 2022

An emerging interest for the application of periodate in synthesis active pharmaceutical ingredients (APIs) and valorization renewable feedstock is eminent. However, exhibits a high molecular mass, expensive compared to other common bulk-oxidizers used only reluctantly technical applications. Recently, new green electrochemical was established. The preparation regeneration method lowers costs enables use regulated products. This review will briefly introduce key innovations survey most important applications production fine chemicals.

Language: Английский

Citations

23

E-Dakin reaction: oxidation of hydroxybenzaldehydes to phenols with electrochemically generated peroxodicarbonate as sustainable ex-cell oxidizer DOI Creative Commons
Fiona Sprang, Niclas Schupp, Philipp J. Kohlpaintner

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(10), P. 5862 - 5868

Published: Jan. 1, 2024

Peroxodicarbonate, a sustainable electrochemically generated oxidizer, provides the means to transform abundant hydroxybenzaldehydes into valuable phenols in safe and effective manner.

Language: Английский

Citations

6

Synthesis of Aromatic N-Oxides Using Electrochemically Generated Peroxodicarbonate DOI
Philipp J. Kohlpaintner, Niclas Schupp,

Niklas Ehlenz

et al.

Organic Letters, Journal Year: 2024, Volume and Issue: 26(8), P. 1607 - 1611

Published: Feb. 16, 2024

Electrochemically generated green platform oxidizers like peroxodicarbonate (PODIC) constitute a game-changing technology in terms of sustainable chemistry while serving as an alternative counterreaction the electrochemical hydrogen evolution. Peroxodicarbonate avoids storage and shipping concentrated peroxide solution. We herein disclose efficient method for N-oxidation quinolines, pyridines, complex tertiary amines. The use phenoyloxy succinimide (POSI) is decisive factor obtaining N-oxides (28 examples) isolated yields up to 98%.

Language: Английский

Citations

6

The Oxidation of Organo‐Boron Compounds Using Electrochemically Generated Peroxodicarbonate DOI Creative Commons
Philipp J. Kohlpaintner,

Lucas Marquart,

Lukas J. Gooßen

et al.

European Journal of Organic Chemistry, Journal Year: 2023, Volume and Issue: 26(17)

Published: March 14, 2023

Abstract Peroxodicarbonate represents a green and largely underexplored oxidizer generated electrochemically from aqueous carbonate solutions. Through state‐of‐the‐art electrolyzer technology, highly concentrated solutions have now become accessible. These were successfully employed as in deborolative hydroxylations. A plethora of phenols alcohols thus been synthesized up to 99 % organoboron compounds using only non‐toxic solvents. This transformation was scaled‐up multi‐gram batch sizes.

Language: Английский

Citations

12

Direct Anodic Conversion of 4-Hydroxybenzaldehydes into Benzoquinones DOI
Fiona Sprang,

Jana Klein,

Siegfried R. Waldvogel

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(20), P. 7755 - 7764

Published: May 9, 2023

A novel electrosynthetic protocol for the direct conversion of easily accessible 4-hydroxybenzaldehydes into valuable benzoquinones is reported. The transformation enabled through anodic oxidation and performed in a reagent-free manner devoid terminal oxidants redox mediators to effectively minimize waste. Environmentally benign inexpensive graphite serves as metal-free anode material. broad range substituents, including halogens, are tolerated this electrochemical protocol, quinones selectively yields up 99%. Furthermore, compatibility with flow synthesis demonstrated. Moreover, successfully applied biopolymer lignosulfonate provides 7.6 wt%. mechanistic proposal Dakin-type reaction offered. sustainability synthetic utility evaluated quantitatively compared established protocols by application different green chemistry metrics.

Language: Английский

Citations

12

Peroxodicarbonate – A Renaissance of an Electrochemically Generated Green Oxidizer DOI Creative Commons
Theresa Rücker, Niclas Schupp, Fiona Sprang

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(56), P. 7136 - 7147

Published: Jan. 1, 2024

Peroxodicarbonate, accessible from direct anodic conversion of alkali carbonates, has experienced a renaissance in the past two decades. An overview its history, synthesis, characteristics and reactivity is provided.

Language: Английский

Citations

4

Pilot Scale Electrolysis of Peroxodicarbonate as an Oxidizer for Lignin Valorization DOI Creative Commons
Theresa Rücker, Torbjørn Pettersen,

Hannah Graute

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(30), P. 11283 - 11296

Published: July 18, 2024

A pilot scale plant at Technology Readiness Level (TRL) 6 comprising an electrochemical ex-cell continuous production of sodium peroxodicarbonate and a thermal depolymerization plug flow reactor for kraft lignin conversion is established. Due to the labile nature "green" oxidizer peroxodicarbonate, special attention must be paid parameters in order optimize its use. simplified design model describing steady-state transient operations formulated finally validated against experimental data from electrolysis setup. Design trade-offs are visualized, their impact on specific energy consumption evaluated. The was operated 20-month period more than 1200 h on-stream. Optimized process conditions result vanillin yields 8 wt % thus prove successful scale-up.

Language: Английский

Citations

4

Trends and Challenges in Electrifying Technical Organic Synthesis DOI Creative Commons
Philipp Röse,

Paul Neugebauer,

Siddharth Tamang

et al.

Chemie Ingenieur Technik, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract Organic electrosynthesis is a potential enabler for the energy and resource transition in chemical industry as it offers sustainable alternative to homogeneous or heterogeneous processes producing fine commodity chemicals. It utilizes electricity instead of hazardous reagents and, thus, also allows reducing product's carbon footprint waste production. enables dynamic operation safe due galvanostatic process control. Electro‐organic are not yet widespread. Engineering tools have been tailored electro‐organic processes, more quantitative model‐based insight needed. Extensive adoption requires efforts regarding electrode material performance stability, scalable reactor design, digitization. Addressing these issues interdisciplinary collaboration, particularly between chemists engineers, accelerate implementation with high efficiency economic feasibility.

Language: Английский

Citations

0

Selective Degradation of Technically Relevant Lignin to Vanillic Acid and Protocatechuic Acid DOI Creative Commons

Finn Moeller,

Jana Klein,

Siegfried R. Waldvogel

et al.

ChemSusChem, Journal Year: 2024, Volume and Issue: 17(22)

Published: May 31, 2024

Abstract A new and practical method for the thermal degradation of technically relevant bio‐based lignin is presented. By heating a solution in highly concentrated caustic potash, vanillic acid almost exclusively obtained yields up to 10.6 wt %. altering reaction parameters, selectivity can be shifted towards demethylation product, protocatechuic acid, which yield 6.9 Furthermore, procedure was applicable different types Kraft organosolv lignin. To create an economically feasible process, ion exchange resins were used work‐up media without neutralizing complete mixture. selective removal desired from this alkaline could directly reused at least 5 further degradations significant loss yield.

Language: Английский

Citations

3