Eosin Y as a direct HAT photocatalyst for the synthesis of tetrahydrodipyrazolopyridines under white LED irradiation

Nagasundaram, Nagarajan; Peroli, Udhayakumar; Venkatesh, Ramakrishnan; Vinoth, Nangagoundan; Lalitha, Appaswami

doi:10.1016/j.tetlet.2023.154366

Cited by 8 publications

(2 citation statements)

References 51 publications

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“…16 Recently, acridinium compounds are used as photocatalysts for organic synthesis. 17 Several examples have been reported for synthesizing hexahydroacridine through a one-pot three-component reaction involving different aldehydes, various 1,3-diketones, and amines under suitable conditions. 18,19 In our work, we have developed a new protocol by introducing 5,5-dimethyl-3-(2-phenylhydrazinyl)cyclohex-2-enone for the synthesis of a new series of acridine derivatives under catalyst-free conditions.…”

Section: Introductionmentioning

confidence: 99%

“…A multitude of acridines and substituted acridines as corrosion inhibitors of different metals and alloys in various corrosive media have been studied 16 . Recently, acridinium compounds are used as photocatalysts for organic synthesis 17 . Several examples have been reported for synthesizing hexahydroacridine through a one‐pot three‐component reaction involving different aldehydes, various 1,3‐diketones, and amines under suitable conditions 18,19 .…”

Section: Introductionmentioning

confidence: 99%

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Innovative and sustainable synthesis and structure of novel N‐substituted hexahydroacridine derivatives

Vinoth,

Kalaiarasi,

Lalitha

2024

J of Physical Organic Chem

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An efficient and green synthesis of tetramethyl‐10‐(phenylamino)‐3,4,6,7,9,10‐hexahydroacridine‐1,8(2H,5H)‐dione derivatives has been achieved from various substituted aryl aldehydes, 5,5‐dimethyl‐3‐(2‐phenylhydrazinyl)cyclohex‐2‐enone and dimedone in aqueous ethanol medium. Environment‐friendly reaction, excellent yields, operational simplicity and shorter reaction times are the significant features of the present protocol. All the synthesized compounds were characterized by various spectroscopic techniques and X‐ray crystal diffraction studies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Innovative and sustainable synthesis and structure of novel N‐substituted hexahydroacridine derivatives

Vinoth,

Kalaiarasi,

Lalitha

2024

J of Physical Organic Chem

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Immobilized Eosin Y on Modified Silica Nanoparticles and their Applications in Organic Synthesis

Guadalupe Martin,

Clavero,

Martín

et al. 2024

Eur J Org Chem

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The development of novel photocatalytic systems is crucial for advancing sustainable chemical processes in organic synthesis. In this study, we report the preparation, characterization, and application of a heterogeneous photocatalyst based on Eosin Y (EY) covalently immobilized on silica nanoparticles (SNPs). The SNPs‐EY photocatalyst was thoroughly characterized using various techniques, including SEM, TEM, X‐ray diffraction, UV‐vis diffuse reflectance spectroscopy, solid‐state fluorescence spectroscopy, XPS, FT‐IR, TGA, and DLS. These analyses confirmed the successful immobilization of EY on SNPs and demonstrated the uniformity and favourable photophysical properties of the resulting hybrid material. The photocatalytic performance of SNPs‐EY was evaluated in a series of model reactions, including aza‐Henry reaction (cross‐dehydrogenative coupling), reduction of nitrocompounds, and photooxidation of dimethylanthracene. The reaction results demonstrated that SNPs‐EY is an effective and recyclable photocatalyst, offering yields comparable to or higher than those of homogeneous systems, while providing the advantages of easy separation and reuse. This study highlights the potential of SNPs‐EY as a versatile photocatalyst for various organic transformations, promoting the advancement of green and sustainable chemistry

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Tailor‐Made Pyrazolopyridines and Fused Pyrazolopyridines: Recent Updates toward Sustainable Synthesis

Alam Mondal,

Ghosh

2024

ChemistrySelect

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Over the last three decades, owing to labour cost, time and especially environmental issues, one‐pot synthesis of heterocyclic compounds involving tandem or multicomponent (sequential or consecutive) reactions has gained particular attention worldwide. Most of the marketed drug molecules hold one or more heterocyclic rings. Due to some side effects of several drugs along with the gradual emergence of antimicrobial resistance, the necessity for developing new heterocyclic molecules continues; special attention should be paid in this respect towards employing more one‐pot reactions for their syntheses. Pyrazolopyridines are fused heterocycles holding pyridine and pyrazole and possess a wide variety of biological and pharmaceutical properties. Several existing drug molecules also bear pyrazolopyridine scaffolds. The present perspective is an endeavour to encompass green syntheses of different isomeric pyrazolopyridine systems, most of these published during the past five years or more for a few cases.

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Eosin Y as a direct HAT photocatalyst for the synthesis of tetrahydrodipyrazolopyridines under white LED irradiation

Cited by 8 publications

References 51 publications

Innovative and sustainable synthesis and structure of novel N‐substituted hexahydroacridine derivatives

Innovative and sustainable synthesis and structure of novel N‐substituted hexahydroacridine derivatives

Immobilized Eosin Y on Modified Silica Nanoparticles and their Applications in Organic Synthesis

Tailor‐Made Pyrazolopyridines and Fused Pyrazolopyridines: Recent Updates toward Sustainable Synthesis

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