Sulfated titania (TiO2-SO42−) as an efficient and reusable solid acid catalyst for the multi-component synthesis of highly functionalized piperidines

Geetha, S.; Thangamani, Arumugam; Valliappan, R.; Vedanayaki, S.; Ganapathi, A.

doi:10.1016/j.cdc.2020.100565

Cited by 11 publications

(6 citation statements)

References 62 publications

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“…Thangamani et al [90] have developed the one-pot pseudo fivecomponent reaction of β-keto esters, aromatic amines and aromatic aldehydes in presence of TiO 2 -SO 4 2À solid acid catalyst to afford highly functionalized piperidine derivatives (Scheme 37). The reaction with various aldehydes possessing substitutions in different positions reacted smoothly to afford the piperidine derivatives in good yields.…”

Section: Synthesis Of Piperidinesmentioning

confidence: 99%

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Sulfated Titania (TiO₂‐SO₄²⁻) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021

2022

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Sulfated titania (TiO2‐SO42−) is a unique and versatile catalytic material which is non‐toxic, non‐corrosive, non‐pollutant and easily separable in nature. Sulfated titania can engage in various organic reactions, as it contains both Lewis acid and Bronsted acid sites. A wide number of organic reactions in the presence of sulfated titania have been reported, most of which displays excellent conversion and selectivity for the syntheses of desired products with significant applications. This review endeavors to give an overview of the research highlights solicitous with sulfated titania. Even though it is arduous to cover all the research articles in the literature, various milestones in the route towards highly functionalized sulfated titania are explored. It is hoped that this review article will trigger the attention of researchers over sulfated titania for the advancement of new eco‐compatible approaches in organic chemistry.

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Section: Synthesis Of Piperidinesmentioning

confidence: 99%

“…Preparation of highly functionalized piperidines. [90] Scheme 38. Dehydration reaction of sorbitol using TiO 2 -SO 4…”

Section: P Biswas Et Al Have Developed a Catalytic System Tio 2 -Somentioning

confidence: 99%

Sulfated Titania (TiO₂‐SO₄²⁻) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021

2022

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“…However, whether the percent of the active agent increased to 3 wt%, the active role of the reused film decreased to 85% from the maximum capacity of the new film. Geetha et al [6] showed that TiO 2 -SO 4 catalysts can be successfully used to piperidine synthesis even five times, the process yield decreasing only by 2%. Menon et al [7] showed that the photocatalytic removal of estrogenic compounds over the TiO 2 -ZnO nanocomposite is efficient even after three cycles under visible irradiation without loss in activity.…”

Section: Introductionmentioning

confidence: 99%

Polylactic Acid-Based Film Modified with Nano-Ag-Graphene-TiO2: New Film versus Recycled Film

Peter,

Nicula,

Mihaly Cozmuta

et al. 2023

Advances in Polymer Technology

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The increase in the polymer-based materials needs has induced along the waste accumulation, thus argued higher interest in recycling. The study aims to assess the structural, morphological, mechanical resistance, physical–chemical and biochemical characteristics, as well as the preservative role during the curd cheese storage of a recycled polylactic acid (PLA)-based film modified with Ag-graphene-TiO2 nanostructured composite, obtained by recovering the composite from the used film, followed by its incorporation in new PLA. The breaking load of the recycled film was 24% lower than that of the new film and 10% higher than of the neat PLA. Differential scanning calorimetry (DSC) showed changes of the recycled PLA’s surface tension and crystallization degree in a greater extent than in the newly prepared film, revealing better incorporation of the recovered composite into the PLA matrix. Fourier transformed infrared spectroscopy showed the formation of C–O–Ti bridges between composite and PLA both in new and recycled film. Oxygen transmission rate (OTR) of the new and recycled film decreased by 33% and 45%, respectively, in comparison with reference PLA. The curd cheese was successfully stored in the recycled packaging; the organoleptic characteristics of cheese wrapped in recycled film were superior in comparison with the new film. The variation of fat and protein contents and mass loss was the lowest when the recycled film was used as packaging material. The study successfully showed the possibility to recover and recycle the used PLA-based films modified with inorganic nanocomposites.

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“…Heterocyclic compounds containing nitrogen, oxygen and sulphur atom widely present in various natural products and biologically active molecules, functional materials, ligands and catalysts, and are also used as multipurpose building blocks in organic synthesis [23]. Particularly, many commercial medicines and agrochemicals possess heterocyclic moieties [24]. Substantial efforts have been devoted into development of synthetic methods toward construction of heterocyclic compounds [25][26][27].In the continuation of our research program directed toward the development of new synthetic methods for the preparation of a variety of heterocyclic compounds via mild and environmentally benign conditions [28].…”

Section: Introductionmentioning

confidence: 99%

review on green multicomponent synthesis of heterocyclic compounds

D’souza

D’Souza

Mendonca

et al. 2022

ijhs

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Heterocyclic compounds are of very much concern in our daily life. These compounds constitute the largest and most varied family of organic compounds. Heterocyclic compounds have one or more hetero atoms in their structure., Day by day the number is increasing rapidly due to the enormous synthetic research and also their synthetic utility. They may be cyclic or non-cyclic in nature. They are predominantly used as pharmaceuticals, as agrochemicals and as veterinary products. They also find applications as sanitizers, developers, antioxidants, as corrosion inhibitors, as copolymers, dye stuff and anticancer drugs. They are used as vehicles in the synthesis of other organic compounds. In this review, we cover most biological active heterocyclic compounds that it’s recently synthesized or extracted from the plants e.g. antibiotics such as penicillin’s, cephalosporin; alkaloids such as vinblastine, morphine, reserpine etc. have heterocyclic moiety.

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Sulfated titania (TiO2-SO42−) as an efficient and reusable solid acid catalyst for the multi-component synthesis of highly functionalized piperidines

Cited by 11 publications

References 62 publications

Sulfated Titania (TiO₂‐SO₄²⁻) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021

Sulfated Titania (TiO₂‐SO₄²⁻) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021

Polylactic Acid-Based Film Modified with Nano-Ag-Graphene-TiO2: New Film versus Recycled Film

review on green multicomponent synthesis of heterocyclic compounds

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Sulfated titania (TiO2-SO42−) as an efficient and reusable solid acid catalyst for the multi-component synthesis of highly functionalized piperidines

Cited by 11 publications

References 62 publications

Sulfated Titania (TiO2‐SO42−) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021

Sulfated Titania (TiO2‐SO42−) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021

Polylactic Acid-Based Film Modified with Nano-Ag-Graphene-TiO2: New Film versus Recycled Film

review on green multicomponent synthesis of heterocyclic compounds

Contact Info

Product

Resources

About

Sulfated Titania (TiO₂‐SO₄²⁻) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021

Sulfated Titania (TiO₂‐SO₄²⁻) as an Efficient Catalyst for Organic Synthesis: Overarching Review from 2000 to 2021