Photochemical reactions of biomass derived platform chemicals DOI Creative Commons
Norbert Hoffmann, Mario Andrés Gómez Fernández, Arthur Desvals

et al.

Frontiers in Chemistry, Journal Year: 2024, Volume and Issue: 12

Published: Dec. 10, 2024

Platform chemicals obtained from biomass will play an important role in chemical industry. Already existing compounds or not yet established are produced this renewable feedstock. Using photochemical reactions as sustainable method for the conversion of matter furthermore permits to develop processes that interesting ecological and economical point view. Furans levoglucosenone thus carbohydrate containing biomass. Photochemical rearrangements, photooxygenation photocatalytic radical can be carried out with such compounds. Also, sugars pentoses hexoses more easily transformed into heterocyclic target when used. Lignin is source aromatic vanillin. Photocycloaddition these alkenes use light supported multicomponent yield molecules. Dyes, surfactants possessing a high degree molecular diversity complexity have been synthesized key steps. Alkenes platform also by fermentation processes, example, cyanobacteria using biological photosynthesis. Such well terpenes may further yielding, precursors jet fuels.

Language: Английский

Visible-light induced direct C(sp3)–H functionalization: recent advances and future prospects DOI
Jia‐Lin Tu, Yining Zhu, Pengcheng Li

et al.

Organic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(18), P. 5278 - 5305

Published: Jan. 1, 2024

This review summarizes the latest methodological advances in photocatalytic C(sp 3 )–H functionalization, with a particular emphasis on formation of C–P, C–B, C–S bonds, etc ., and some prominent efforts asymmetric C–H functionalization.

Language: Английский

Citations

15
Catalysis in the Excited State: Bringing Innate Transition Metal Photochemistry into Play DOI Creative Commons
Fabio Juliá

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 4665 - 4680

Published: March 5, 2025

Transition metal catalysis is an indispensable tool for organic synthesis that has been harnessed, modulated, and perfected many decades by careful selection of centers ligands, giving rise to synthetic methods with unparalleled efficiency chemoselectivity. Recent developments have demonstrated how light irradiation can also be recruited as a powerful dramatically alter the outcome catalytic reactions, providing access innovative pathways remarkable potential. In this context, adoption photochemical conditions mainstream strategy drive reactions unveiled exciting opportunities exploit rich excited-state framework transition metals applications. This Perspective examines advances in application complexes standalone photocatalysts, exploiting innate reactivity their excited states beyond common use photoredox catalysts. An account relevant examples dissected provide discussion on electronic reorganization, orbitals involved, associated different types states. analysis aims practitioners fundamental principles guiding strategies understand, design, apply light-activation homogeneous synthesis.

Language: Английский

Citations

1
Titanium in photocatalytic organic transformations: current applications and future developments DOI
Jia‐Lin Tu, Binbin Huang

Organic & Biomolecular Chemistry, Journal Year: 2024, Volume and Issue: 22(33), P. 6650 - 6664

Published: Jan. 1, 2024

Titanium, as an important transition metal, has garnered extensive attention in both industry and academia due to its excellent mechanical properties, corrosion resistance, unique reactivity organic synthesis. In the field of photocatalysis, titanium-based compounds such titanium dioxide (TiO

Language: Английский

Citations

6
Photocatalytic Oxidative Hydroacylation with Alcohols DOI

Sabhya Sandha,

Chandra Bhushan Tripathi

Organic & Biomolecular Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A photocatalytic oxidative hydroacylation with alcohols for C–N and C–C bond formation is reported.

Language: Английский

Citations

0
Effect of UV Light Exposure Duration on the Removal of Exfoliation Agent Residues in Two‐Dimensional Perovskite Nanosheets: An AFM Study DOI Creative Commons
Fatma Pinar Gordesli, Begümnur Küçükcan, Özge Sağlam

et al.

ChemPlusChem, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Accurate determination of dielectric properties and surface characteristics two-dimensional (2D) perovskite nanosheets, produced by chemical exfoliation layered perovskites, is often hindered agent residues such as tetrabutylammonium (TBA). This study investigated the effect ultraviolet (UV) light exposure duration on removal TBA from 2D Ca2NaNb4O13 - nanosheets deposited silicon substrates via Langmuir-Blodgett method using atomic force microscopy (AFM). Nanoscale adhesion forces between AFM tips nanofilms exposed to UV for 3, 12, 18, 24 hours were measured. Nanofilms 12 showed significant heterogeneity in compared control not UV. improved after 18 reached maximum homogeneity at hours. A noticeable decrease indicated a reduction hours, with further observed The most probable those 3 1.6-fold 2.0-fold higher, respectively, Similarly, roughness peaked then decreased longer exposure, resulting smoother

Language: Английский

Citations

0
Efficient photocatalytic oxidation of cyclohexane to KA oil by carbon nitride hybridized decatungstate under visible light DOI
Jue Wang, Jinyi Yang,

Siyu Zeng

et al.

Journal of Catalysis, Journal Year: 2025, Volume and Issue: 443, P. 115996 - 115996

Published: Feb. 3, 2025

Language: Английский

Citations

0
Cascade C(sp3)-H Bond Functionalization/Cyclization Reaction for the Synthesis of 3,3-Disubstituted Oxindoles by Decatungstate Photocatalysis DOI

X.-N. Fang,

Jiaxing Lv,

Shuxin Yang

et al.

Tetrahedron, Journal Year: 2025, Volume and Issue: unknown, P. 134578 - 134578

Published: March 1, 2025

Language: Английский

Citations

0
Monobromination of Cubane 1,4-Diester, A Synthetic Handle for Fluorosulfonylation and Giese-Type Reactions DOI

Laly Donnier-Valentin,

Julien Legros, Catherine Fressigné

et al.

Organic Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

The bromination of cubane 1,4-diester is described for the first time. versatility C-Br bond forging C-S and C-C bonds was demonstrated. fluorosulfonylation reaction allowed entry in click chemistry illustrated with nucleophiles, electrophiles, alkynes. grafting appendages amino acids dipeptides, enabling discrimination diesters via cyclization into "fused cubane-lactam" structures.

Language: Английский

Citations

0
Photochemically Enabled Total Syntheses of Stemoamide Alkaloids DOI

Nicholas Rajai Akkawi,

David A. Nicewicz

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Photochemical transformations continue to serve as powerful synthetic tools for rapid chemical synthesis and diversification. Recent developments in photoredox photochemical reactivity have captured the attention of researchers a wide array disciplines, where many new applications these reactions been reported. We disclose use strategies modern approach natural product that leverages inherent radicals platform constructing complex scaffolds. demonstrate this an iterative synthesis, offering novel tactics, mild conditions, operationally simple procedures construct three stemoamide alkaloids shortest sequences date. The key disconnection involves both oxidative reductive capabilities acridinium catalyst forge densely functionalized tetrahydrofuran ring via polar radical crossover cycloaddition. resultant butyrolactone serves handle cycloaddition unique oxaspirocyclic butenolide. Finally, late-stage heteroarene transmutation provides linchpin intermediate used access alkaloids. efficiency syntheses exemplifies power while also demonstrating departure from traditional disconnections shedding light on type art.

Language: Английский

Citations

0
Photocatalytic and Chemoselective H/D Exchange at α-Thio C(sp3)-H Bonds DOI

Riku Ogasahara,

Miyu Mae,

Yuki Itabashi

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Deuterated compounds used in drug discovery and live-cell imaging have recently gained the attention of various scientific fields. Although hydrogen-deuterium (H/D) exchange reactions are straightforward deuteration methods, achieving perfect chemoselectivity is challenging. We report highly chemoselective α-thio C(sp3)-H bonds using a thioxanthone or anthraquinone organic photocatalyst bearing an aromatic ketone skeleton D2O as inexpensive deuterium source under 390 nm irradiation. Notably, incorporation at α-positions O/N atoms, benzylic positions, rings was not observed. The present accomplished via single electron transfer mechanism between S-containing substrates, proven by laser-induced time-resolved transient absorption spectroscopic measurements. Furthermore, proposed method could be applied to including pharmaceuticals biologically active with high regioselectivities. available deuterated novel alkylation reagents for future materials Raman were also demonstrated.

Language: Английский

Citations

0