Microwave Assisted Knoevenagel Condensation Using Sodium Fluoride and Lithium Chloride as Catalysts Under Solvent-Free Conditions

Mogilaiah, K.; Prashanthi, M.; Reddy, G. Randheer; Reddy, C. Suresh; Reddy, N. Vasudeva

doi:10.1081/scc-120021512

Cited by 29 publications

(6 citation statements)

References 6 publications

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“…2-(4-methylbenzyliene)malononitrile (4a) and (Z)-ethyl-2-cyano-3-(p-tolyl)acrylate (4b) was synthesized using reported procedure by Mogilaiah et al [49].…”

Section: Synthesis Of Intermediate 4a and 4bmentioning

confidence: 99%

AIE Based Coumarin Chromophore - Evaluation and Correlation Between Solvatochromism and Solvent Polarity Parameters

Lanke

Sekar

2015

J Fluoresc

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A new class of red emitting extensively conjugated donor-π-acceptor type dyes bearing coumarin units have been synthesized by condensation of 7-(diethylamino)-2-oxo-2 H-chromene-3-carbaldehyde with different active methylenes. All the dyes are characterized by (1)H NMR, (13)C NMR and HRMS spectroscopy. The photophysical behaviour and the relation between structure and properties of the coumarin "push-pull" derivatives were investigated experimentally. The dyes exhibited positive solvatochromism and solvatofluorism in solution of varying polarity. These coumarin dyes show aggregation induced emission properties with red emitting fluorescence. They show absorption in the range of 501-528 and emission in the range of 547-630 nm. We evaluated photophysical properties of coumarin dyes using solvotochromism and solvent dependent shift in the emission wavelength. All the synthesized coumarin dyes COS1-COS4 are showing very good solvatochromic properties.

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“…2-(4-methylbenzyliene)malononitrile (4a) and (Z)-ethyl-2-cyano-3-(p-tolyl)acrylate (4b) was synthesized using reported procedure by Mogilaiah et al [49].…”

Section: Synthesis Of Intermediate 4a and 4bmentioning

confidence: 99%

AIE Based Coumarin Chromophore - Evaluation and Correlation Between Solvatochromism and Solvent Polarity Parameters

Lanke

Sekar

2015

J Fluoresc

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“…Further, the 1,8-naphthyridine ring system is an important pharmacophore element in medicinal chemistry (9)(10). In view of this and in continuation of our interest in microwave-assisted organic transformation (11)(12)(13)(14)(15), we report herein a convenient, practical and rapid microwave assisted Claisen-Schmidt condensation to prepare α, ß-unsaturated ketones under solvent-free conditions using p-toluenesulphonic acid (PTSA) as catalyst. The reaction proceeds efficiently in excellent yields at ambient pressure within a few minutes.…”

Section: Introductionmentioning

confidence: 98%

Ptsa Catalyzed Claisen-Schmidt Condensation in Solventfree Conditions Under Microwave Irradiation

Mogilaiah¹,

Sakram²,

Kavitha³

2007

Heterocyclic Communications

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“…Microwave irradiation is a non-conventional heating source used in many organic syntheses because it frequently provides a considerable reduction in the reaction time. One example of organic synthesis assisted by microwaves, is the Knoevenagel condensation, and the results are very good [15,16,17]. Moreover, some of these reactions are eco-friendly too, because they are carried out using inorganic supports that can be reused in other reaction cycles and avoid the use of solvents [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

n-Butyl Cyanoacrylate Synthesis. A New Quality Step Using Microwaves

et al. 2014

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Alkyl cyanoacrylates are interesting products for use in industry because of their properties enabling them to stick together a wide range of substrates. n-Butyl cyanoacrylate is one of the most successfully used tissue adhesives in the field of medicine because it exhibits bacteriostatic and haemostatic characteristics, in addition to its adhesive properties. At present, its synthesis is performed with good yields via Knoevenagel condensation using conventional sources of heating, but this requires a long processing time. The aim of this work was to look for a new way of synthesising n-butyl cyanoacrylate using microwave irradiation as the source of heating. This non-conventional source of heating most likely reduces the process time of the synthesis. In comparison with a conventional heating source, such as an oil bath, the results showed the advantages of this method whereby the n-butyl cyanoacrylate gave the same yield and quality with a reduction in the reaction time by a factor of 3-5-fold.

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Microwave Assisted Knoevenagel Condensation Using Sodium Fluoride and Lithium Chloride as Catalysts Under Solvent-Free Conditions

Cited by 29 publications

References 6 publications

AIE Based Coumarin Chromophore - Evaluation and Correlation Between Solvatochromism and Solvent Polarity Parameters

AIE Based Coumarin Chromophore - Evaluation and Correlation Between Solvatochromism and Solvent Polarity Parameters

Ptsa Catalyzed Claisen-Schmidt Condensation in Solventfree Conditions Under Microwave Irradiation

n-Butyl Cyanoacrylate Synthesis. A New Quality Step Using Microwaves

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