Aayesha nasreen | Jazan University (original) (raw)
Papers by Aayesha nasreen
Shodhganga, Sep 15, 2015
Abstract. This thesis is divided into five chapters. The first chapter describes the introduction... more Abstract. This thesis is divided into five chapters. The first chapter describes the introduction about the hydroxylation of arenes and heteroarenes synthesis of parahydroxymandelic acid derivatives, resolution and biological activity. ...
Organic Communications
Based on Friedel Crafts acylation, an efficient and facile method for the chemo-selective as well... more Based on Friedel Crafts acylation, an efficient and facile method for the chemo-selective as well as region-selective acylation of substituted benzene derivatives has been developed by using Hg[Co(SCN)4] as catalyst. The reaction is highly chemo-selective as well as region-selective as only acetophenones were obtained, whereas the benzophenones are not formed. The present method is very efficient with simple work up gives the products in good to excellent yield. The reaction is carried out using CHCl3 as solvent at room temperature. It is anticipated that the present newly developed method will open a gateway for the chemist to prepare the chemo as well as region-selective acetophenones.
Al-Azhar Bulletin of Science, Jun 1, 2014
In the present study we extend the scope of the Cu(NO 3) 2 .3H 2 O catalyzed synthesis of amido a... more In the present study we extend the scope of the Cu(NO 3) 2 .3H 2 O catalyzed synthesis of amido alkyl naphthols and the results are presented here. In order to optimize the reaction conditions initially we studied the efficacy of Cu(NO 3) 2 .3H 2 O by taking catalytic amount of 10 mol% and benzaldehyde (1 mmol) β-naphthol (1 mmol) and acetamide (1.2 mmol) in acetonitrile (10 ml) as model reaction.We have developed a practical and new, general efficient procedure for the one pot synthesis of amidoalkyl naphthols by coupling of various aromatic aldehydes with amides urea and β-naphthol using Cu(NO 3) 2 .3H 2 O as catalyst. The present protocol has several advantages of readily available, inexpensive catalyst, mild reaction conditions, easy handling, excellent yields, greater selectivity, operational and experimental simplicity. We believe that Cu(NO 3) 2 .3H 2 O catalyzed methodology will definitely be a valuable addition to the existing process in the field of amidoalkyl naphthols.
Organic communications, May 29, 2017
An eco-friendly simple and efficient synthesis of 3,3'-bis(indolyl)methanes was carried out by el... more An eco-friendly simple and efficient synthesis of 3,3'-bis(indolyl)methanes was carried out by electrophilic substitution reaction of indole with structurally divergent aldehydes by using succinic acid as green catalyst and water as green solvent under microwave irradiation. The advantages of this protocol are excellent yields, higher availability, inexpensive catalyst, lack of toxicity, shorter reaction time and more environmentally friendly catalyst. The reaction is chemoselective applicable only to aldehydes.
Synthesis and reactivity in inorganic and metal-organic chemistry, 1979
Tris(2-aminoethyl)amine condenses with salicylaldehyde and its substituted analogs in a 1:3 molar... more Tris(2-aminoethyl)amine condenses with salicylaldehyde and its substituted analogs in a 1:3 molar ratio to form Schiff bases which are potentially tribasic heptadentate ligands. The characterization of Cr(III), Fe(III), and La(III) complexes with one of these new ligands, tris(3,5-dichlorosalicylidene-2-iminoethyl)amine (H33,5-Cl2 Saltren), is also described.
ChemInform, Dec 26, 2000
Aromatic Hydroxylation by a New Cupric Nitrate-H 2 O 2-Phosphate Buffer System.-A new, ecofriendl... more Aromatic Hydroxylation by a New Cupric Nitrate-H 2 O 2-Phosphate Buffer System.-A new, ecofriendly and regioselective procedure for the highly effective hydroxylation of aromatic compounds providing the corresponding phenols is described.-(NASREEN, AAYESHA; ADAPA,
ChemInform, Aug 28, 2007
... efficient recyclable catalyst for the acetylation of phenols, alcohols, and amines under neat... more ... efficient recyclable catalyst for the acetylation of phenols, alcohols, and amines under neat conditions Ravi Varala, Aayesha Nasreen, and Srinivas R. Adapa Abstract: A catalytic amount of ruthenium(III) acetylacetonate (2 mol%) [Ru(acac) 3 ] enables solvent-free acetylation ...
Heterocyclic Communications, 2001
Nitrogen heterocycles have been efficiently hydroxvlated under mild and neutral conditions by emp... more Nitrogen heterocycles have been efficiently hydroxvlated under mild and neutral conditions by employing Cupric nitrate/phosphate buffer/30 0 ohvdrogen peroxide system The present method afforded the biologically active and important hydroxy heterocycles. The hydroxylation takes place regioselectively without over oxidation.
Research Journal of Medicinal Plant, 2007
Asian Journal of Chemistry, 2013
An efficient and convenient approach to the synthesis of 1,8-dioxo-octahydroxanthene derivatives ... more An efficient and convenient approach to the synthesis of 1,8-dioxo-octahydroxanthene derivatives by using catalytic amount (10 mol %) of cupric nitrate [Cu(NO3)2•3H2O] in acetonitrile and the yields obtained are in good to excellent (75-96 %). The reaction is highly chemo selective and applicable to aldehydes only.
Tetrahedron Letters, 2007
Benzimidazole derivatives R 0200 L-Proline Catalyzed Selective Synthesis of 2-Aryl-1-arylmethyl-1... more Benzimidazole derivatives R 0200 L-Proline Catalyzed Selective Synthesis of 2-Aryl-1-arylmethyl-1H-benzimidazoles.-A practical and inexpensive procedure for the synthesis of benzimidazoles from o-phenylenediamines and aromatic aldehydes is developed.-(VARALA, R.;
Tetrahedron Letters, 2013
Oriental Journal of Chemistry
Deprotection of phenylhydrazones, semicarbazones and oximes to their corresponding carbonyl compo... more Deprotection of phenylhydrazones, semicarbazones and oximes to their corresponding carbonyl compounds have been carried out in good to excellent yields (83-96 %) by using citric acid as organic catalyst in water as a medium of reaction under microwave irradiation.
Phosphorus, Sulfur, and Silicon and the Related Elements, 2009
... Green Protocol for the Synthesis of Bisindolylmethanes and Evaluation of Their Antimicrobial ... more ... Green Protocol for the Synthesis of Bisindolylmethanes and Evaluation of Their Antimicrobial Activities Anjali Tiwari and Meenakshi Jain Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India ...
Canadian Journal of Chemistry, 2006
A catalytic amount of ruthenium(III) acetylacetonate (2 mol%) [Ru(acac)3] enables solvent-free te... more A catalytic amount of ruthenium(III) acetylacetonate (2 mol%) [Ru(acac)3] enables solvent-free tetrahydropyranylation of different types of alcohols and phenols at ambient temperature in moderate to excellent yields. Notably, selective monoprotection of diols can be achieved chemoselectively. Furthermore, the catalyst could be recovered and reused if necessary.Key words: tetrahydropyranyl ethers, protecting groups, ruthenium(III) acetylacetonate, alcohols, thiols.
Organic Preparations and Procedures International, 1999
Derivatives of carbonyl compounds such as N,N-dimethylhydrazones and phenylhydrazones serve as im... more Derivatives of carbonyl compounds such as N,N-dimethylhydrazones and phenylhydrazones serve as important synthetic intermediates, used for the purification and characterization of carbonyl-containing molecules and as protective groups.'-3 Extensive studies on the ...
Organic Preparations and Procedures …, 2000
The replacement of hydrogen on aromatic ring with a variety of substituents by electrophilic arom... more The replacement of hydrogen on aromatic ring with a variety of substituents by electrophilic aromatic substitution is one of the most important processes in organic synthesis.' The hydroxylation of aromatics has received considerable attention during the last 20 years and the utility of H,O,
Shodhganga, Sep 15, 2015
Abstract. This thesis is divided into five chapters. The first chapter describes the introduction... more Abstract. This thesis is divided into five chapters. The first chapter describes the introduction about the hydroxylation of arenes and heteroarenes synthesis of parahydroxymandelic acid derivatives, resolution and biological activity. ...
Organic Communications
Based on Friedel Crafts acylation, an efficient and facile method for the chemo-selective as well... more Based on Friedel Crafts acylation, an efficient and facile method for the chemo-selective as well as region-selective acylation of substituted benzene derivatives has been developed by using Hg[Co(SCN)4] as catalyst. The reaction is highly chemo-selective as well as region-selective as only acetophenones were obtained, whereas the benzophenones are not formed. The present method is very efficient with simple work up gives the products in good to excellent yield. The reaction is carried out using CHCl3 as solvent at room temperature. It is anticipated that the present newly developed method will open a gateway for the chemist to prepare the chemo as well as region-selective acetophenones.
Al-Azhar Bulletin of Science, Jun 1, 2014
In the present study we extend the scope of the Cu(NO 3) 2 .3H 2 O catalyzed synthesis of amido a... more In the present study we extend the scope of the Cu(NO 3) 2 .3H 2 O catalyzed synthesis of amido alkyl naphthols and the results are presented here. In order to optimize the reaction conditions initially we studied the efficacy of Cu(NO 3) 2 .3H 2 O by taking catalytic amount of 10 mol% and benzaldehyde (1 mmol) β-naphthol (1 mmol) and acetamide (1.2 mmol) in acetonitrile (10 ml) as model reaction.We have developed a practical and new, general efficient procedure for the one pot synthesis of amidoalkyl naphthols by coupling of various aromatic aldehydes with amides urea and β-naphthol using Cu(NO 3) 2 .3H 2 O as catalyst. The present protocol has several advantages of readily available, inexpensive catalyst, mild reaction conditions, easy handling, excellent yields, greater selectivity, operational and experimental simplicity. We believe that Cu(NO 3) 2 .3H 2 O catalyzed methodology will definitely be a valuable addition to the existing process in the field of amidoalkyl naphthols.
Organic communications, May 29, 2017
An eco-friendly simple and efficient synthesis of 3,3'-bis(indolyl)methanes was carried out by el... more An eco-friendly simple and efficient synthesis of 3,3'-bis(indolyl)methanes was carried out by electrophilic substitution reaction of indole with structurally divergent aldehydes by using succinic acid as green catalyst and water as green solvent under microwave irradiation. The advantages of this protocol are excellent yields, higher availability, inexpensive catalyst, lack of toxicity, shorter reaction time and more environmentally friendly catalyst. The reaction is chemoselective applicable only to aldehydes.
Synthesis and reactivity in inorganic and metal-organic chemistry, 1979
Tris(2-aminoethyl)amine condenses with salicylaldehyde and its substituted analogs in a 1:3 molar... more Tris(2-aminoethyl)amine condenses with salicylaldehyde and its substituted analogs in a 1:3 molar ratio to form Schiff bases which are potentially tribasic heptadentate ligands. The characterization of Cr(III), Fe(III), and La(III) complexes with one of these new ligands, tris(3,5-dichlorosalicylidene-2-iminoethyl)amine (H33,5-Cl2 Saltren), is also described.
ChemInform, Dec 26, 2000
Aromatic Hydroxylation by a New Cupric Nitrate-H 2 O 2-Phosphate Buffer System.-A new, ecofriendl... more Aromatic Hydroxylation by a New Cupric Nitrate-H 2 O 2-Phosphate Buffer System.-A new, ecofriendly and regioselective procedure for the highly effective hydroxylation of aromatic compounds providing the corresponding phenols is described.-(NASREEN, AAYESHA; ADAPA,
ChemInform, Aug 28, 2007
... efficient recyclable catalyst for the acetylation of phenols, alcohols, and amines under neat... more ... efficient recyclable catalyst for the acetylation of phenols, alcohols, and amines under neat conditions Ravi Varala, Aayesha Nasreen, and Srinivas R. Adapa Abstract: A catalytic amount of ruthenium(III) acetylacetonate (2 mol%) [Ru(acac) 3 ] enables solvent-free acetylation ...
Heterocyclic Communications, 2001
Nitrogen heterocycles have been efficiently hydroxvlated under mild and neutral conditions by emp... more Nitrogen heterocycles have been efficiently hydroxvlated under mild and neutral conditions by employing Cupric nitrate/phosphate buffer/30 0 ohvdrogen peroxide system The present method afforded the biologically active and important hydroxy heterocycles. The hydroxylation takes place regioselectively without over oxidation.
Research Journal of Medicinal Plant, 2007
Asian Journal of Chemistry, 2013
An efficient and convenient approach to the synthesis of 1,8-dioxo-octahydroxanthene derivatives ... more An efficient and convenient approach to the synthesis of 1,8-dioxo-octahydroxanthene derivatives by using catalytic amount (10 mol %) of cupric nitrate [Cu(NO3)2•3H2O] in acetonitrile and the yields obtained are in good to excellent (75-96 %). The reaction is highly chemo selective and applicable to aldehydes only.
Tetrahedron Letters, 2007
Benzimidazole derivatives R 0200 L-Proline Catalyzed Selective Synthesis of 2-Aryl-1-arylmethyl-1... more Benzimidazole derivatives R 0200 L-Proline Catalyzed Selective Synthesis of 2-Aryl-1-arylmethyl-1H-benzimidazoles.-A practical and inexpensive procedure for the synthesis of benzimidazoles from o-phenylenediamines and aromatic aldehydes is developed.-(VARALA, R.;
Tetrahedron Letters, 2013
Oriental Journal of Chemistry
Deprotection of phenylhydrazones, semicarbazones and oximes to their corresponding carbonyl compo... more Deprotection of phenylhydrazones, semicarbazones and oximes to their corresponding carbonyl compounds have been carried out in good to excellent yields (83-96 %) by using citric acid as organic catalyst in water as a medium of reaction under microwave irradiation.
Phosphorus, Sulfur, and Silicon and the Related Elements, 2009
... Green Protocol for the Synthesis of Bisindolylmethanes and Evaluation of Their Antimicrobial ... more ... Green Protocol for the Synthesis of Bisindolylmethanes and Evaluation of Their Antimicrobial Activities Anjali Tiwari and Meenakshi Jain Centre of Advanced Studies, Department of Chemistry, University of Rajasthan, Jaipur, India ...
Canadian Journal of Chemistry, 2006
A catalytic amount of ruthenium(III) acetylacetonate (2 mol%) [Ru(acac)3] enables solvent-free te... more A catalytic amount of ruthenium(III) acetylacetonate (2 mol%) [Ru(acac)3] enables solvent-free tetrahydropyranylation of different types of alcohols and phenols at ambient temperature in moderate to excellent yields. Notably, selective monoprotection of diols can be achieved chemoselectively. Furthermore, the catalyst could be recovered and reused if necessary.Key words: tetrahydropyranyl ethers, protecting groups, ruthenium(III) acetylacetonate, alcohols, thiols.
Organic Preparations and Procedures International, 1999
Derivatives of carbonyl compounds such as N,N-dimethylhydrazones and phenylhydrazones serve as im... more Derivatives of carbonyl compounds such as N,N-dimethylhydrazones and phenylhydrazones serve as important synthetic intermediates, used for the purification and characterization of carbonyl-containing molecules and as protective groups.'-3 Extensive studies on the ...
Organic Preparations and Procedures …, 2000
The replacement of hydrogen on aromatic ring with a variety of substituents by electrophilic arom... more The replacement of hydrogen on aromatic ring with a variety of substituents by electrophilic aromatic substitution is one of the most important processes in organic synthesis.' The hydroxylation of aromatics has received considerable attention during the last 20 years and the utility of H,O,