• NOPR Ecofriendly bromination of chalcones and synthesis

    2016 7 20   Selective bromination of chalcones and 2 hydroxychalcones has been carried out with ammonium bromide and ammonium persulphate using grinding technique at RT under aqueous moist condition to give α β dibromochalcones and α β dibromo 2 hydroxychalcones respectively. α β Dibromo 2 hydroxychal­c­ones have been cyclodehydrobrominated with

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  • Overview on cumulative synthetic approaches for chalcone

    2021 2 1   Zeba et al. has reported the lewis acid Zn l proline 2 catalyze synthesis of chromonyl chalcones from 3 formylchromones and a variety of active methylene compounds .The reaction was performed in water and the catalyst was successfully recovered. The catalyst has been used several times without the substantial loss in selectivity and the yield of the product.

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  • NOPR Ecofriendly bromination of chalcones and synthesis

    2016 7 20   Selective bromination of chalcones and 2 hydroxychalcones has been carried out with ammonium bromide and ammonium persulphate using grinding technique at RT under aqueous moist condition to give α β dibromochalcones and α β dibromo 2 hydroxychalcones respectively. α β Dibromo 2 hydroxychal­c­ones have been cyclodehydrobrominated with barium hydroxide moist and ethanol at RT to give flavones using grinding technique.

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  • Synthesis and molecular docking studies of certain

    2018 12 25   new chalcones using grindstone technique 9. In grindstone technique reac tion occurs through generation of local heat by grinding of crystals of sub strate and reagent by mortar and pestle. Reactions are initiated by grinding with the small amount of energy through friction. In some cases a mixture and reagents turns to a glassy material.

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  • SYNTHESES AND ANTIOXIDANT ACTIVITIES OF SOME HYDROXY

    Four 4 hydroxy dimethoxy chalcones derivatives were synthesized by Claisen Schmidt condensation of hydroxyacetophenone with 3 4 dimethoxybenzaldehyde using conventional method and grinding technique. The synthesized compounds were characterized by spectroscopy IR

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  • Judul DisertasiJudul Disertasi SINTESIS SENYAWA

    2021 3 16   condensation to produce four chalcones chalcone 1 chalcone 2 chalcone 3 and chalcone 4 . The chalcones derivative were synthesized by conventional method using solvent and grinding technique free solvent . The chalcones undergo cyclization reactions

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  • Synthesis and molecular docking studies of certain

    2018 12 25   new chalcones using grindstone technique 9. In grindstone technique reac tion occurs through generation of local heat by grinding of crystals of sub strate and reagent by mortar and pestle. Reactions are initiated by grinding with the small amount of energy through friction. In some cases a mixture and reagents turns to a glassy material.

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  • PDF Synthesis of Pyrazole by Grinding techniques

    Synthesis of N1 3 4 diphenyl 5 dihydro 2 3 pyrazol 3 5 diphenyl 4 diydro pyrazole IIa d A mixture of I 0.01mol phenyl hydrazine 0.01mol and 2 3 drops of glacial acetic acid was grinded in agate morter for 2 3 hrs. The reaction mixture was concentrated in vaccum and the solid so obtained was filtered washed dried and

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  • Synthesis and molecular docking studies of certain

    2018 12 25   new chalcones using grindstone technique 9. In grindstone technique reac tion occurs through generation of local heat by grinding of crystals of sub strate and reagent by mortar and pestle. Reactions are initiated by grinding with the small amount of energy through friction. In some cases a mixture and reagents turns to a glassy material.

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  • SYNTHESIS AND CHARACTERIZATION OF HETEROCYCLIC CHALCONES

    2015 10 28   Zangade S. Mokle S. Vibhute A. and Vibhute Y. 2011. An Efficient and Operationally Simple Synthesis of some New Chalcones by Using Grinding Technique. Journal of Chemical Sciences. 13 1 6. Narender T. a Papi Reddy K. 2007. A Simple and Highly Efficient Method for the Synthesis of Chalcones by Using Boron Trifluoride Etherate.

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  • Synthesis and pharmacological properties of chalcones a

    2017 6 28   Chalcones and their analogs have been an area of great interest in recent years. Numerous research papers have been published and chalcones continue to show promise for new drug investigations. Researchers have explored new approaches for the synthesis of chalcone derivatives which have revealed an array of pharmacological and biological effects.

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  • Synthesis and Biological Activities of Some JOCPR

    2021 3 19   Chalcones form central core for a variety of important biological compounds.In addition chalcones have exhibited the property of skin lightening and cosmetic activity 2 . Hydrochalcones prevent the formation of melanin cultured by human melanocytes 3 . The synthesis of chalcones can be carried out by Aldol condensation.

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  • SYNTHESIS AND CHARACTERIZATION OF HETEROCYCLIC CHALCONES

    2015 10 28   Zangade S. Mokle S. Vibhute A. and Vibhute Y. 2011. An Efficient and Operationally Simple Synthesis of some New Chalcones by Using Grinding Technique. Journal of Chemical Sciences. 13 1 6. Narender T. a Papi Reddy K. 2007. A Simple and Highly Efficient Method for the Synthesis of Chalcones by Using Boron Trifluoride Etherate.

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  • PDF Synthesis of Pyrazole by Grinding techniques

    Synthesis of N1 3 4 diphenyl 5 dihydro 2 3 pyrazol 3 5 diphenyl 4 diydro pyrazole IIa d A mixture of I 0.01mol phenyl hydrazine 0.01mol and 2 3 drops of glacial acetic acid was grinded in agate morter for 2 3 hrs. The reaction mixture was concentrated in vaccum and the solid so obtained was filtered washed dried and

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  • A Green Synthesis of Chalcones As an Antioxidant and

    2018 1 1   Three chalcones 4 amino 4 methoxy chalcone 4 amino 3 4 dimethoxy chalcone and 4 amino 3 4 5 trimethoxy chalcone has been synthesized by a green chemistry approach using grinding technique. Antioxidant activity of the chalcones were assessed using 1 1 biphenyl 2 picrylhydrazyl DPPH radical scavenging method.

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  • ChemInform Abstract Ecofriendly Bromination

    ChemInform Abstract Ecofriendly Bromination of Chalcones I and Synthesis of Flavones III Using Grinding Technique. Jakhar Komal Makrandi J. K. download BookSC. Download books for free. Find books آپ کتاب کا معائنہ کر سکتے ہیں اور اپنے تجربات

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  • Synthesis of Chalcone Derivatives and Their in vitro

    The synthesis of chalcone derivatives as target compounds and anticancer test against breast T47D and colon WiDr cell line had been performed. The synthesis was performed by Claisen Schmidt condensation by using acetophenone and benzaldehyde derivatives. The anticancer activity test of chalcone derivatives was carried out by MTT assay against T47D and WiDr cell lines.

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  • Solvent less reactions Green and sustainable approaches

    2020 1 1   The synthesis of 2 pyrazoline derivatives is achieved by reacting 2′ hydroxy chalcones with hydrazine hydrate under solvent free grinding technique. Mortar with pestle is used for grinding the above reactants at room temperature for 2–3 min.

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  • Synthesis and Characterization of Some Bromochalcones

    Chalcones are considered to be precursors of flavonoids and have variety of biological activities. Three of bromochalcones derivatives were synthesized by a green chemistry approach using grinding technique and their structure also confirmed. Synthesis of bromochalcone 4′ bromo 4 methoxychalcone 4′ bromo 3 4 dimethoxychalcone 4′ bromo 3 4 5 trimethoxychalcone were carried out using

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  • ORIGINALARTICLE

    2018 6 15   procedure for the synthesis of chalcones Scheme 1 which involves the grinding of a mixture of aryl chalcones by grinding technique under solvent free 2 grinding 2 5minutes Roomtemperature 83 92 Presentmethod. R R1 R2 R3 O H O R4 R5 R6 O R4 R5 R R6 R1 R2 R3

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  • A highly efficient simple and ecofriendly microwave

    2021 3 19   In the present work grindstone technique was used first time for the synthesis of titled compounds. This method is superior since it is ecofriendly high yielding requires no special apparatus non hazardous simple and convenient. The significance of this approach is that chalcone can be obtained by grinding with dramatic improvement in yield .further the work up process is also simplified

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  • ORIGINALARTICLE

    2018 6 15   procedure for the synthesis of chalcones Scheme 1 which involves the grinding of a mixture of aryl chalcones by grinding technique under solvent free 2 grinding 2 5minutes Roomtemperature 83 92 Presentmethod. R R1 R2 R3 O H O R4 R5 R6 O R4 R5 R R6 R1 R2 R3

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  • Synthesis of Chalcones and the evaluation of their

    Method Novel chalcones were synthesized by the Claisen Schmidt condensation by two methods in an alcoholic medium as solvent and without a solvent by the grindstone technique. The purity and structure of synthesized compounds were investigated by thin layer chromatography 1H and 13C NMR in conjunction with elemental analysis respectively.

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  • Synthesis and pharmacological properties of chalcones a

    2017 6 28   Chalcones and their analogs have been an area of great interest in recent years. Numerous research papers have been published and chalcones continue to show promise for new drug investigations. Researchers have explored new approaches for the synthesis of chalcone derivatives which have revealed an array of pharmacological and biological effects.

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  • Synthesis and Characterization of Some Bromochalcones

    Chalcones are considered to be precursors of flavonoids and have variety of biological activities. Three of bromochalcones derivatives were synthesized by a green chemistry approach using grinding technique and their structure also confirmed. Synthesis of bromochalcone 4′ bromo 4 methoxychalcone 4′ bromo 3 4 dimethoxychalcone 4′ bromo 3 4 5 trimethoxychalcone were carried out using

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  • SYNTHESES AND ANTIOXIDANT ACTIVITIES OF SOME HYDROXY

    Four 4 hydroxy dimethoxy chalcones derivatives were synthesized by Claisen Schmidt condensation of hydroxyacetophenone with 3 4 dimethoxybenzaldehyde using conventional method and grinding technique. The synthesized compounds were characterized by spectroscopy IR

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  • SYNTHESIS OF HETEROCYCLIC CHALCONES AND THEIR

    2017 4 26   2.1 Synthesis of chalcones 17 using the grinding technique Zangade et al. 2011 8 2.2 Synthesis of chalcones 24 by m icrowave irradiation Ahmad et al. 2011a 8 2.3 Synthesis of chalcones 29 through the Suzuki coupling reaction Eddarir et al. 2003 9 2.4 Synthesis of chalcones

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  • One Pot and Two Pot Synthesis of Chalcone Based Mono

    2020 1 23   The synthesis of pyrazoline via two pot technique is commonly reported compared to one pot technique. A classical method for the synthesis of pyrazoline was involved a two pot technique. The technique consisted of two steps synthesis which are the preparation of chalcones followed by cyclization with hydrazine hydrate under suitable reaction conditions .

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  • Judul DisertasiJudul Disertasi SINTESIS SENYAWA

    2021 3 16   condensation to produce four chalcones chalcone 1 chalcone 2 chalcone 3 and chalcone 4 . The chalcones derivative were synthesized by conventional method using solvent and grinding technique free solvent . The chalcones undergo cyclization reactions

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  • Solvent less reactions Green and sustainable approaches

    2020 1 1   The synthesis of 2 pyrazoline derivatives is achieved by reacting 2′ hydroxy chalcones with hydrazine hydrate under solvent free grinding technique. Mortar with pestle is used for grinding the above reactants at room temperature for 2–3 min.

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  • Synthesis and Characterization of Some Bromochalcones

    2019 9 1   Chalcones are considered to be precursors of flavonoids and have variety of biological activities. Three of bromochalcones derivatives were synthesized by a green chemistry approach using grinding technique and their structure also confirmed. Synthesis of bromochalcone 4 bromo 4 methoxychalcone 4 bromo 3 4 dimethoxychalcone 4 bromo 3 4

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  • Spectral Correlations and Antimicrobial Activities of some

    as internal standard . Mass spectra of all chalcones were recorded on SHIMADZU spectrometer using chemical ionization technique. 2. 2. Synthesis of Chalcones All substituted styryl 1 pyrenyl chalcones were synthesized by procedure published in literature.

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  • A Green Synthesis of Chalcones As an Antioxidant and

    2018 1 1   Three chalcones 4 amino 4 methoxy chalcone 4 amino 3 4 dimethoxy chalcone and 4 amino 3 4 5 trimethoxy chalcone has been synthesized by a green chemistry approach using grinding technique. Antioxidant activity of the chalcones were assessed using 1 1 biphenyl 2 picrylhydrazyl DPPH radical scavenging method.

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  • PDF Synthesis of Chalcones by grindstone chemistry as an

    Synthesis of Chalcones by grindstone chemistry as an intermediate in Organic Synthesis. IntroductionThe chalcones and their derivatives are important intermediates in organic synthesis. They serve as starting material for the synthesis of variety of heterocyclic compounds which are of physiological importance.

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  • PDF Synthesis of New Fluorinated Chalcone Derivative

    operationally simple synthesis of some new chalcones by using 10. Kumar N Jain JS Sinha R Garg VK Bansal SK. Evaluation of grinding technique. Chem Sci J 2011 13 1 6. some novel chalcone derivatives for antimicrobial and antiviral 20. Jayapal MR Prasad KS Sreedhar NY. Synthesis and activity.

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  • Overview on cumulative synthetic approaches for chalcone

    2021 2 1   Zeba et al. has reported the lewis acid Zn l proline 2 catalyze synthesis of chromonyl chalcones from 3 formylchromones and a variety of active methylene compounds .The reaction was performed in water and the catalyst was successfully recovered. The catalyst has been used several times without the substantial loss in selectivity and the yield of the product.

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  • An Environment friendly Synthesis of Piperonal Chalcones

    2021 3 24   Keywords Grindstone chemistry chalcones cytotoxicity antioxidant DPPH test cirplatin. Abstract Background Grindstone technique has been widely used as an efficient consistent more environmentally benign solvent free protocol for the preparation of

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  • A Green Synthesis of Chalcones As an Antioxidant and

    2018 1 1   Three chalcones 4 amino 4 methoxy chalcone 4 amino 3 4 dimethoxy chalcone and 4 amino 3 4 5 trimethoxy chalcone has been synthesized by a green chemistry approach using grinding technique. Antioxidant activity of the chalcones were assessed using 1 1 biphenyl 2 picrylhydrazyl DPPH radical scavenging method.

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  • SYNTHESIS AND CHARACTERIZATION OF HETEROCYCLIC CHALCONES

    2015 10 28   An Efficient and Operationally Simple Synthesis of some New Chalcones by Using Grinding Technique. Journal of Chemical Sciences. 13 1 6. Narender T. a Papi Reddy K. 2007. A Simple and Highly Efficient Method for the Synthesis of Chalcones by Using Boron Trifluoride Etherate.

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  • SYNTHESIS OF HETEROCYCLIC CHALCONES AND THEIR

    2017 4 26   2.1 Synthesis of chalcones 17 using the grinding technique Zangade et al. 2011 8 2.2 Synthesis of chalcones 24 by m icrowave irradiation Ahmad et al. 2011a 8 2.3 Synthesis of chalcones 29 through the Suzuki coupling reaction Eddarir et al. 2003 9 2.4 Synthesis of chalcones

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  • PDF Synthesis of Pyrazole by Grinding techniques

    Synthesis of Pyrazole by Grinding techniques. Pravina Piste. Research Article CODEN IJPRNK IMPACT FACTOR 4.278 ISSN 2277 8713 Piste P IJPRBS 2014 Volume 3 4 284 290 IJPRBS INTERNATIONAL JOURNAL OF PHARMACEUTICAL RESEARCH AND BIO SCIENCE SYNTHESIS OF SOME N1 SUBSTITUTED PYRAZOLE DERIVATIVES BY GRINDING TECHNIQUE PISTE P1

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