Synthesis of 1,4-dihydropyridine esters using low-melting sugar mixtures as green solvents

Kumar, Jai; Shridhar, Gomathi; Ladage, Savita; Ravishankar, Lakshmy

doi:10.1080/00397911.2016.1242750

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…35 Recently we have reported the use of low melting mixtures of sugars, urea and CeCl 3 · 7H 2 O as efficient green solvents for the synthesis of 1,4-dihydropyridines. 36 In continuation with our previous work on the use of Cerium chloride heptahydrate (CeCl 3 · 7H 2 O) as a mild, low cost and high performance catalyst in the green synthesis of heterocyclic compounds, we now report a facile synthesis of a number of 1,3,5-trisubstituted -2pyrazolines from chalcones and phenyl hydrazine using CeCl 3 · 7H 2 O as catalyst and ethyl lactate (70%) as a solvent. To the best of our knowledge, the use of these conditions for the synthesis of pyrazolines is not reported in the literature.…”

Section: Introductionmentioning

confidence: 66%

An eco-friendly synthesis of 2-pyrazoline derivatives catalysed by $$\hbox {CeCl}_{3} \cdot 7\hbox {H}_{2}\hbox {O}$$ CeCl 3 · 7 H 2 O

Bhat

Shridhar²,

Ladage

et al. 2017

J Chem Sci

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Section: Introductionmentioning

confidence: 66%

An eco-friendly synthesis of 2-pyrazoline derivatives catalysed by $$\hbox {CeCl}_{3} \cdot 7\hbox {H}_{2}\hbox {O}$$ CeCl 3 · 7 H 2 O

Bhat

Shridhar²,

Ladage

et al. 2017

J Chem Sci

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“…Characterization of sugar‐based DES, LTTM, and molten salts was presented in many works . These type of media were proposed, e.g., for biomass pretreatment, extraction, production of porous materials from starch/polycaprolactone blends, as polysaccharide solvents, and reaction media/substrates . In this work, we presented for the first time sugar/glycerol‐based LTTM.…”

Section: Introductionmentioning

confidence: 99%

Low Transition Temperature Mixtures (LTTM) Containing Sugars as Potato Starch Plasticizers

2019

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For the first time, low transition temperature mixtures – LTTM based on sugars: fructose (Fruc), glucose (Gluc) or sucrose (Suc), and glycerol (G) are prepared, characterized by DSC and applied as potato starch plasticizers. Sugar‐based LTTM exhibits good plasticizing activity leading to homogenous transparent, flexible thermoplastic starch (TPS) materials. Mechanical, dynamic mechanical (DMA), X‐ray diffractometry (XRD), and FTIR analysis of obtained TPS/LTTM films are performed for their relative comparison. For TPS/Fruc:G films, tensile strength (TS) and Young's modulus (YM) decreases and elongation at break (EB) increases with increase of G. However, for TPS/Gluc:G molar ratio of Gluc to G did not affect significantly on films mechanical properties. Comparing two monosugars, i.e., Gluc and Fruc, TPS/Gluc:G materials exhibit slightly higher TS (4.8–5.8 MPa) but lower EB (44–61%) in comparison with TPS/Fruc:G films (TS 3.2–5.0 MPa; EB 90–115%) at 25 °C, RH 50%. LTTM as whole mixture of components led to TPS products with not only higher TS, YM but even EB in comparison with films where sugars and G were added separately into starch. Mutual interaction between sugar, polyol and starch is confirmed by DMA. XRD reveals that starch with LTTM undergone amorphization and TPS/Suc:G 1:6 is the most amorphous among investigated TPS films.

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Low Melting Mixtures: Neoteric Solvents and/or Catalysts for a Green Approach to Organic Reactions

Theresa

Shaibuna

2023

MROC

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In the past two decades, low melting mixtures have become attractive because of their interesting characteristics such as, physicochemical properties, low cost of components, easiness to prepare, low toxicity, biorenewability and biodegradability. Carbohydrates which are the most important and widespread renewable compound on earth are introduced in low melting mixtures to get more cost effective and renewable solvents. The present review mainly focuses on the properties and applications of low melting mixtures, which completely satisfy the green chemistry principles. Many physicochemical properties of low melting mixtures were studied recently. The various studies included thermal stability, glass transition temperature, density, viscosity, acidity, surface tension, refractive index, FT-IR spectra, conductivity etc. The application towards organic synthesis makes the low melting mixtures very important. An analysis on the reports on low melting mixtures and their application in organic synthesis as solvent and the dual role as catalyst and solvent is presented.

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Synthesis of 1,4-dihydropyridine esters using low-melting sugar mixtures as green solvents

Cited by 4 publications

References 29 publications

An eco-friendly synthesis of 2-pyrazoline derivatives catalysed by $$\hbox {CeCl}_{3} \cdot 7\hbox {H}_{2}\hbox {O}$$ CeCl 3 · 7 H 2 O

An eco-friendly synthesis of 2-pyrazoline derivatives catalysed by $$\hbox {CeCl}_{3} \cdot 7\hbox {H}_{2}\hbox {O}$$ CeCl 3 · 7 H 2 O

Low Transition Temperature Mixtures (LTTM) Containing Sugars as Potato Starch Plasticizers

Low Melting Mixtures: Neoteric Solvents and/or Catalysts for a Green Approach to Organic Reactions

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