Naphthoquinone-Based Oxime Esters for Free Radical Photopolymerization under Sunlight or a Blue Light-Emitting Diode

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(9), P. 3962 - 3974

Published: Feb. 22, 2024

Free radical polymerization initiated under visible light or sunlight remains one of the major challenges in photopolymer chemistry area. Because low intensity modern sources (light-emitting diodes, LEDs) and mismatch their absorption spectra with that irradiation sources, commercial usual photoinitiators often exhibit poor efficiency blue sunlight. In this work, eight naphtho[2,3-d]thiazole-4,9-dione benzaldehyde-based oxime esters were developed as type I multicomponent photoinitiating systems good properties region, especially at 405 450 nm. Compared to benchmark photoinitiator (diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, TPO), some our initiators furnished similar better photoinitiation performance than reference upon exposure LED@405 TPO, most newly proposed used could furnish on par system nm LED@450 Among interesting results study, final acrylate function conversions be obtained during free trimethylolpropane triacrylate within 1 h by using solar when combined iodonium salt aromatic amine.

Language: Английский

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An efficient metal-free and catalyst-free C–S/C–O bond-formation strategy: synthesis of pyrazole-conjugated thioamides and amides

Beilstein Journal of Organic Chemistry, Journal Year: 2023, Volume and Issue: 19, P. 231 - 244

Published: March 2, 2023

An operationally simple and metal-free approach is described for the synthesis of pyrazole-tethered thioamide amide conjugates. The thioamides were generated by employing a three-component reaction diverse pyrazole C-3/4/5 carbaldehydes, secondary amines, elemental sulfur in single synthetic operation. advantages this developed protocol refer to broad substrate scope, easy perform conditions. Moreover, C-3/5-linked conjugates also synthesized via an oxidative amination carbaldehydes 2-aminopyridines using hydrogen peroxide as oxidant.

Language: Английский

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2-Amino-1,4-naphthoquinone as a key precursor for naphthoquinone-fused N-heterocycles: synthetic approaches and mechanistic perspectives

Molecular Diversity, Journal Year: 2025, Volume and Issue: unknown

Published: May 14, 2025

Language: Английский

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Recent advances on naphthoquinone-imidazolyl and naphthoquinone-thiazolyl derivatives as photoinitiators of photopolymerization

European Polymer Journal, Journal Year: 2024, Volume and Issue: 219, P. 113401 - 113401

Published: Aug. 27, 2024

Language: Английский

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Synthesis, crystals structures, DFT, and anticancer activities of polycyclic heterocyclic quinones

Journal of Molecular Structure, Journal Year: 2024, Volume and Issue: 1321, P. 139788 - 139788

Published: Aug. 24, 2024

Language: Английский

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Oxidative Aminotrifluoromethylation of 1,4-Naphthoquinone

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 89(18), P. 13117 - 13127

Published: Sept. 3, 2024

A strategy for convenient and precise oxidative aminotrifluoromethylation of 1,4-naphthoquinone with the Togni reagent amines has been demonstrated via a radical process. This method allows efficient access preparation wide range CF

Language: Английский

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Pushing Boundaries: What’s Next in Metal-Free C–H Functionalization for Sulfenylation?

Topics in Current Chemistry, Journal Year: 2024, Volume and Issue: 382(2)

Published: April 12, 2024

Language: Английский

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Synthesis and Photophysical Characterization of Fluorescent Naphtho[2,3-d]thiazole-4,9-Diones and Their Antimicrobial Activity against Staphylococcus Strains

Molecules, Journal Year: 2024, Volume and Issue: 29(12), P. 2777 - 2777

Published: June 11, 2024

The chemical reaction of 2-(methylsulfinyl)naphtho[2,3-d]thiazole-4,9-dione (3) using different amines, including benzylamine (4a), morpholine (4b), thiomorpholine (4c), piperidine (4d), and 4-methylpiperazine (4e), produced corresponding new tricyclic naphtho[2,3-d]thiazole–4,9–dione compounds (5a–e) in moderate-to-good yields. photophysical properties antimicrobial activities these were then characterized. Owing to the extended π-conjugated system skeleton substituent effect, 5a–e showed fluorescence both solution solid state. introduction nitrogen-containing heterocycles at position 2 thiazole ring on naphtho[2,3-d]thiazole-4,9-dione led large bathochromic shifts solution, 5b–e exhibited orange-red with emission maxima over 600 nm highly polar solvents. Staphylococcus aureus (S. aureus) is a pathogenic bacterium, infection its antimicrobial-resistant pathogen methicillin-resistant S. (MRSA) results serious clinical problems. In this study, we also investigated against aureus, MRSA, epidermidis. Compounds 5c group 5e potent activity bacteria. These will lead development fluorescent dyes future.

Language: Английский

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Visible light-driven and substrate-promoted alkenyltrifluoromethylation of alkenes to synthesize CF3-functionalized 1,4-naphthoquinones

Organic & Biomolecular Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The first example of the visible light-driven and substrate-promoted three-component alkenyltrifluoromethylation alkenes is developed. This approach uses easily available alkenes, 2-arylamino-1,4-naphthoquinones Togni reagent as reactants, describes good functionality tolerance. reaction offers a precise synthesis valuable CF

Language: Английский

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