Water hyacinth ash: an efficient green catalyst for the synthesis of β-amino carbonyl/nitrile compounds by aza-Michael reaction at room temperature

Talukdar, Anjumani; Deka, Dibakar Chandra

doi:10.1007/s42452-020-2281-7

Cited by 11 publications

(2 citation statements)

References 47 publications

(50 reference statements)

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“…In recent years, use of biomass in organic synthesis has become a thriving area of research, as it provides promising alternatives to the waste generating conventional organic syntheses. A few of such examples include use of banana ash, [58][59][60][61][62][63][64] pomegranate peel ash, [65][66][67][68] rice-based ashes, [69][70][71][72] papaya-based ashes, [73][74][75] water hyacinth ash, [76,77] mango peel ash, [78] onion peel ash [79] etc. Chickpea leaf exudates, [80] tamarind fruit juice, [81] itaconic acid, [82] and taurine [83] have also been successfully employed as biocatalysts for the synthesis of BIMs.…”

Section: Introductionmentioning

confidence: 99%

Aqueous Extract of Dillenia indica Fruit (AEDI): A Sustainable Biocatalyst for the Synthesis of Pharmacologically Important Bis(indolyl)methanes

Choudhury,

Talukdar,

Chandra Deka

2024

ChemistrySelect

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A highly effective green technique for the synthesis of bis(indolyl) methanes mediated by ‘Aqueous Extract of Dillenia indica’ (AEDI) is developed. The reaction involves a simple procedure at a moderate temperature of below 60 °C in air within a short reaction time of 30–60 minutes under conditions free from external promoters, acids, ligands/organic media using our natural water–extracted catalyst, affording moderate to high yield. This protocol offers a mild, effective, and highly economical alternative to the existing protocols and promotes a more environmentally friendly alternative for the protic and Lewis acids catalysts that are already in use.

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Section: Introductionmentioning

confidence: 99%

Aqueous Extract of Dillenia indica Fruit (AEDI): A Sustainable Biocatalyst for the Synthesis of Pharmacologically Important Bis(indolyl)methanes

Choudhury,

Talukdar,

Chandra Deka

2024

ChemistrySelect

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“…Recently, the use of these waste biomass-derived heterogeneous catalysts for promoting different types of reactions have gained propulsion as they are easily available, environmental-friendly, efficient and cost-effective [ 36 , 41 ]. They are mainly used for the production of biodiesel [ 36 , 42 , 43 ] and their efficacy as a catalyst in Henry reaction [ 44 , 45 ], Sonogashira reaction [ 46 ], Suzuki-Miyaura coupling reaction [ 47 ], Knoevenagel reaction [ 48 ], Dakin reaction [ 49 ], peptide bond formation [ 50 ] and aza -Michael reaction [ 51 ] was also explored.…”

Section: Introductionmentioning

confidence: 99%

Glycolysis of Poly(Ethylene Terephthalate) Using Biomass-Waste Derived Recyclable Heterogeneous Catalyst

et al. 2020

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Plastic production has increased by almost 200-fold annually from 2 million metric tons per year in 1950s to 359 million metric tons in 2018. With this rapidly increasing production, plastic pollution has become one of the most demanding environmental issues and tremendous efforts have been initiated by the research community for its disposal. In this present study, we reported for the first time, a biomass-waste-derived heterogeneous catalyst prepared from waste orange peel for the depolymerisation of poly(ethylene terephthalate) (PET) to its monomer, bis(2-hydroxyethyl terephthalate) (BHET). The prepared orange peel ash (OPA) catalyst was well-characterised using techniques such as IR, inductively coupled plasma (ICP)-OES (Optical Emission Spectrometry), XRD, X-ray fluorescence (XRF), SEM, energy-dispersive X-ray spectroscopy (EDX), TEM, BET (Brunauer-Emmett-Teller) and TGA. The catalyst was found to be composed of basic sites, high surface area, and a notable type-IV N2 adsorption–desorption isotherm indicating the mesoporous nature of the catalyst, which might have eventually enhanced the rate of the reaction as well as the yield of the product. The catalyst completely depolymerises PET within 90 min, producing 79% of recrystallised BHET. The ability of reusing the catalysts for 5 consecutive runs without significant depreciation in the catalytic activity and its eco- and environmental-friendliness endorses this protocol as a greener route for PET recycling.

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Ashes from organic waste as reagents in synthetic chemistry: a review

Venkateswarlu

2021

Environ Chem Lett

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Water hyacinth ash: an efficient green catalyst for the synthesis of β-amino carbonyl/nitrile compounds by aza-Michael reaction at room temperature

Cited by 11 publications

References 47 publications

Aqueous Extract of Dillenia indica Fruit (AEDI): A Sustainable Biocatalyst for the Synthesis of Pharmacologically Important Bis(indolyl)methanes

Aqueous Extract of Dillenia indica Fruit (AEDI): A Sustainable Biocatalyst for the Synthesis of Pharmacologically Important Bis(indolyl)methanes

Glycolysis of Poly(Ethylene Terephthalate) Using Biomass-Waste Derived Recyclable Heterogeneous Catalyst

Ashes from organic waste as reagents in synthetic chemistry: a review

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