Effect of Microwave Irradiation on the Catalytic Activity of Palladium Supported Catalysts in the One-Step Isomerisation of Cinchona Alkaloids to Δ3,10-Isobases

Lipińska, Teodozja; Borowska, Dominika; Swędra, Natalia; Trochim, Katarzyna

doi:10.1007/s10562-017-2169-3

Cited by 5 publications

(2 citation statements)

References 29 publications

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“…In recent years, the use of ionizing radiation to enhance the structure and properties of nanoscale structures has become one of the promising areas of modern materials science [1]. In addition to the large-scale application in the synthesis of nanoscale structures [2,3], the use of microwave [4], X-ray [5] and gamma radiation [6,7], as well as the processing by accelerated electron beams [8,9] and ions [10] allows directed modification of both the crystal structure and the functional properties of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Electron Beam Induced Enhancement of the Catalytic Properties of Ion-Track Membranes Supported Copper Nanotubes in the Reaction of the P-Nitrophenol Reduction

et al. 2019

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This study considers the effect of various doses of electron irradiation on the crystal structure and properties of composite catalysts based on polyethylene terephthalate track-etched membranes and copper nanotubes. Copper nanotubes were obtained by electroless template synthesis and irradiated with electrons with 3.8 MeV energy in the dose range of 100–250 kGy in increments of 50 kGy. The original and irradiated samples of composites were investigated by X-ray diffraction technique (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The improved catalytic activity of composite membranes with copper nanotubes was demonstrated by the example of the reduction reaction of p-nitrophenol in the presence of sodium borohydride. Irradiation with electrons at doses of 100 and 150 kGy led to reaction rate constant increases by 35 and 59%, respectively, compared to the non-irradiated sample. This enhancing catalytic activity could be attributed to the changing of the crystallite size of copper, as well as the surface roughness of the composite membrane.

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Section: Introductionmentioning

confidence: 99%

Electron Beam Induced Enhancement of the Catalytic Properties of Ion-Track Membranes Supported Copper Nanotubes in the Reaction of the P-Nitrophenol Reduction

et al. 2019

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“…Compared to traditional methods such as crushing, soaking extraction and modern methods such as supercritical fluid extraction, we conclude that treatment with microwave radiation is the only way to detect the berberine, so the use of microwave extraction demonstrated superior antibacterial ability. Lipińska et al [ 107 ] found that the high energy provided by microwave radiation promoted formation of the transition state in alkaloid isomerization which in turn accelerated structural changes. Under microwave catalysis, the site of isomerization reactions is more selective, resulting in higher purity of product (Fig.…”

Section: Transformation Of Natural Productsmentioning

confidence: 99%

Microwave technology: a novel approach to the transformation of natural metabolites

Fang

et al. 2021

Chin Med

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Microwave technology is used throughout the world to generate heat using energy from the microwave range of the electromagnetic spectrum. It is characterized by uniform energy transfer, low energy consumption, and rapid heating which preserves much of the nutritional value in food products. Microwave technology is widely used to process food such as drying, because food and medicinal plants are the same organisms. Microwave technology is also used to process and extract parts of plants for medicinal purposes; however, the special principle of microwave radiation provide energy to reaction for transforming chemical components, creating a variety of compounds through oxidation, hydrolysis, rearrangement, esterification, condensation and other reactions that transform original components into new ones. In this paper, the principles, influencing factors of microwave technology, and the transformation of natural metabolites using microwave technology are reviewed, with an aim to provide a theoretical basis for the further study of microwave technology in the processing of medicinal materials.

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Strategies for sustainable organic synthesis

2022

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Effect of Microwave Irradiation on the Catalytic Activity of Palladium Supported Catalysts in the One-Step Isomerisation of Cinchona Alkaloids to Δ3,10-Isobases

Abstract: R=OMe: quinidine R=H: cinchonine

Cited by 5 publications

References 29 publications

Electron Beam Induced Enhancement of the Catalytic Properties of Ion-Track Membranes Supported Copper Nanotubes in the Reaction of the P-Nitrophenol Reduction

Electron Beam Induced Enhancement of the Catalytic Properties of Ion-Track Membranes Supported Copper Nanotubes in the Reaction of the P-Nitrophenol Reduction

Microwave technology: a novel approach to the transformation of natural metabolites

Strategies for sustainable organic synthesis

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