Visible light motivated synthesis of polyhydroquinoline derivatives using CdS nanowires

Harale, Rajkumar R.; Shitre, Praveen V.; Sathe, Bhaskar R.; Shingare, Murlidhar S.

doi:10.1007/s11164-016-2822-2

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…Among the available photoactive semiconductor materials, cadmium sulfide (CdS) is of great interest to researchers. In comparison with other traditional semiconductor materials, such as titanium dioxide (TiO 2 ) and zinc oxide (ZnO), CdS possesses narrower band gap (about 2.4 eV) for visible light response and more suitable band edge positions for diverse organic transformations rather than nonselective mineralization. − Importantly, CdS can not only be surface-functionalized with multifarious organic or inorganic ligands, but also be surface-assembled with other cocatalysts and/or semiconductor photocatalysts to form a heterostructure, thereby enabling the activity and selectivity of photocatalytic organic synthesis to be adjustable . Up to now, the views of CdS photocatalysts are predominantly centered on the synthetic strategies, morphology, photoelectrical properties, and applications in H 2 production, CO 2 reduction, or degradation of pollutants. − However, the dedicated overview focused on the recent achievement of CdS-based composites toward selective organic transformations is still in its infancy.…”

Section: Introductionmentioning

confidence: 99%

Selective Organic Transformations over Cadmium Sulfide-Based Photocatalysts

et al. 2020

ACS Catal.

240

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The development of efficient catalyst for photoredox-catalyzed selective organic synthesis has consitently been an attractive objective in recent years. Regarding semiconductor-based photocatalysts, cadmium sulfide (CdS) materials have received extensive consideration for various photoredox reactions because of their suitable band gap (about 2.4 eV) for visible light response and well-matched band edge stations. In this paper, we begin with a concise discussion of the basic physical properties of CdS materials, including electronic band structures, optical properties, crystallographic structures, and phase transition. Then, the fundamental principles of photocatalytic organic transformations over CdS and the effect of different active species on the selective photoredox process are concisely summarized. In particular, we will highlight the photocatalytic selective organic synthesis application over various CdS-based photocatalysts, including selective reductions, oxidations, and valorization of lignin. Finally, the future perspectives and challenges in the development of efficient CdS-based photocatalytic system toward selective organic synthesis are discussed. It is anticipated that this timely overview of recent advances in selective organic synthesis over CdS-based materials would inspire the rational design of CdS or other semiconductor-based catalysts with ameliorated performances toward a variety of artificial photoredox-catalyzed selective organic transformations to value-added feedstocks and beyond.

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Section: Introductionmentioning

confidence: 99%

Selective Organic Transformations over Cadmium Sulfide-Based Photocatalysts

et al. 2020

ACS Catal.

240

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“…The reaction mixture was taken to the microwave reactor CEM FocusedMicrowave TM Synthesis System, model Discover (CEM Corp, Matthews, NC), set in the Power Time, where it was maintained for 20 min at a fixed power of 100 W. Compounds 1-23 were identified based on data from their NMR ( 1 H, 13 C, and DEPT 135) and mass spectra, as well on their comparison with the literature data. 30,[44][45][46][47][48][49][50][51][52][53][54][55][56][57] All the compounds were isolated and tested as mixtures of enantiomers.…”

Section: Synthesis Of 14-dyhidropyridines Compoundsmentioning

confidence: 99%

Antibacterial and antileishmanial activity of 1,4-dihydropyridine derivatives

Oliveira,

Silva,

Silva

et al. 2024

Preprint

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We have synthesized twenty-three 1,4-dihydropyridine derivatives (1,4-DHPs) by using a microwave-assisted one-pot multicomponent Hantzsch reaction and evaluated their antibacterial activity against a representative panel of cariogenic bacteria and their in vitro antileishmanial activity against Leishmania (L.) amazonensis promastigotes. Thirteen compounds were moderately active against Streptococcus sanguinis, Streptococcus mitis, and Lactobacillus paracasei. Compound 22 (diethyl 4-(3-methoxy-4-hydroxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate) displayed moderate antibacterial activity against S. mitis and S. sanguinis, with a Minimum Inhibitory Concentration (MIC) of 500 µg/mL); compounds 8 (diethyl 4-(3-chlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate ) and 10 (diethyl 4-(3-nitrophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate) were moderately active against S. sanguinis (MIC = 500 µg/mL) and very active against L. amazonensis promastigotes (IC50 = 43.08 and 34.28 µM, respectively). Among the eight 1,4-DHPs that were active (IC50 < 50 µM) against L. amazonensis promastigotes, compound 13 (diethyl 4-(3,4,5-trimethoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate) gave the lowest IC50 (24.62 µM). On the basis of our results, asymmetric 1,4-DHPs derived from dimedone exhibit antileishmanial potential.

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“…Dihydropyrimidinones show anti-tumor, 18 anti-bacterial, 19 anti-viral, 20 anti-inflammatory, 21 calcium channel blocker, 22 antihypertensive, 23 and other activities. Also, important drug functions such as anti-tumor, 24 bronchodilators, 25 anti-atherosclerotic, 26 vasodilators, anti-inflammatory, 27 modulate calcium channels 28 and antidiabetic 29 properties have been reported for polyhydroquinoline derivatives.…”

Section: Introductionmentioning

confidence: 99%