Renato Noto - Academia.edu (original) (raw)

Papers by Renato Noto

Research paper thumbnail of Kinetic study of methoxide-promoted elimination reactions of some 1,1,1-trichloro-2,2-bis(phenyl-substituted)ethanes

Journal of Physical Organic Chemistry, 2001

... Gianfranco Fontana,1 * Vincenzo Frenna, 1 Liliana Lamartina,2 Maria Concetta Natoli1 and Rena... more ... Gianfranco Fontana,1 * Vincenzo Frenna, 1 Liliana Lamartina,2 Maria Concetta Natoli1 and Renato Noto1 ... The oil obtained was chromatographed on silica gel, employing light petro-leum (bp 40–60°C)–ethyl acetate (80:20) as eluent, gave pure 1d (yield 55%), as white ...

Research paper thumbnail of An analysis of 13C nuclear magnetic resonance substituent chemical shifts in 4- and 5-substituted thiophene-2-carboxylic acids by linear free energy relationships

Journal of the Chemical Society, Perkin Transactions 2, 1987

... Renato Noto lstituto di Chimica Organica, Via Archirafi 20, Palermo 90 723, ltalia Liliana La... more ... Renato Noto lstituto di Chimica Organica, Via Archirafi 20, Palermo 90 723, ltalia Liliana Lamartina * lstituto di Chimica Farmaceutica e Tossicologica, Via Archirafi 32, Palermo 90 123, ltalia Caterina Arnone and Domenico Spinelli lstituto di Scienze Chimiche, Facolta di ...

Research paper thumbnail of Protonation of some substituted phenylthiophen-2-ylmethanones in sulfuric acid

Journal of the Chemical Society, Perkin Transactions 2, 1996

ABSTRACT

Research paper thumbnail of Recyclable Organocatalysts in Asymmetric Reactions

Research paper thumbnail of Kinetics of the reactions of some 5-bromo-2-nitro-3-R-thiophens, 3,4-dibromo-2-nitro-5-R-thiophens, 3-bromo-2-nitro-5-R-thiophens, and 2-bromo-3-nitro-5-R-thiophens with nucleophiles in methanol

Journal of the Chemical Society, Perkin Transactions 2, 1982

ABSTRACT

Research paper thumbnail of Protonation of some 3-, 4-, and 5-substituted thiophen-2-carboxamides

Journal of the Chemical Society, Perkin Transactions 2, 1982

ABSTRACT

Research paper thumbnail of Kinetic and thermodynamic control in the intramolecular hydroxyl capture of seleniranium ions

Tetrahedron Letters, 1999

The formation of tetrahydrofurans and tetrahydropyrans by acid catalyzed cyclization of hydroxy s... more The formation of tetrahydrofurans and tetrahydropyrans by acid catalyzed cyclization of hydroxy selenides can be explained by kinetic and thermodynamic control. The tetrahydropyrans from the hybrid 7-endo/6-exo cyclization are the thermodynamic products of the acid catalyzed cyclization of hydroxy selenides 1, whereas the tetrahydrofurans from the 5-exo cyclization are the kinetic products.

Research paper thumbnail of Mass spectra of some 2- and 4-substituted thiophenecarboxylic acids

Organic Mass Spectrometry, 1983

Mass Spectra of Some 2and 4-Substituted Thiophenecarboxylic Acids Following the research work on ... more Mass Spectra of Some 2and 4-Substituted Thiophenecarboxylic Acids Following the research work on mass spectra of thiophenic compounds,'-' we report here the electron impact mass spectra at 70eV of some 2-and 4-substituted thiophene-3-carboxylic acids (1-23) with the aim of comparing the fragmentations observed with those of the corresponding 3-substituted thiophene-2-carboxylic acids?

Research paper thumbnail of A quantitative study of substituent effects on oxidative cyclization of some 2-aryl-substituted aldehyde thiosemicarbazones induced by ferric chloride and cupric perchlorate

Journal of Heterocyclic Chemistry, 1999

ABSTRACT As a development of our previous work, we performed a kinetic study of the oxidative cyc... more ABSTRACT As a development of our previous work, we performed a kinetic study of the oxidative cyclization reaction of some 2,4-diaryl-substituted aldehyde thiosemicarbazones 1a-n induced by ferric chloride and by cupric perchlorate. The results of cyclization of 1a-n were compared to those of the corresponding 2-methyl derivatives. The kinetic data were analyzed by means of the Hammett's equation.

Research paper thumbnail of Acetal formation from formylthiophene-2-carboxylic acids and recalculation of σ I and σ R substituent constants of the acetal group by 13 C NMR chemical shifts

Journal of Heterocyclic Chemistry, 1988

Research paper thumbnail of Halloysite Nanotubes: Smart Nanomaterials in Catalysis

Catalysts, 2022

The use of clay minerals as catalyst is renowned since ancient times. Among the different clays u... more The use of clay minerals as catalyst is renowned since ancient times. Among the different clays used for catalytic purposes, halloysite nanotubes (HNTs) represent valuable resources for industrial applications. This special tubular clay possesses high stability and biocompatibility, resistance against organic solvents, and most importantly be available in large amounts at a low cost. Therefore, HNTs can be efficiently used as catalysts themselves or supports for metal nanoparticles in several catalytic processes. This review reports a comprehensive overview of the relevant advances in the use of halloysite in catalysis, focusing the attention on the last five years.

Research paper thumbnail of Past, Present and Future Perspectives on Halloysite Clay Minerals

Molecules, 2020

Halloysite nanotubes (HNTs), clay minerals belonging to the kaolin groups, are emerging nanomater... more Halloysite nanotubes (HNTs), clay minerals belonging to the kaolin groups, are emerging nanomaterials which have attracted the attention of the scientific community due to their interesting features, such as low-cost, availability and biocompatibility. In addition, their large surface area and tubular structure have led to HNTs’ application in different industrial purposes. This review reports a comprehensive overview of the historical background of HNT utilization in the last 20 years. In particular it will focus on the functionalization of the surfaces, both supramolecular and covalent, following applications in several fields, including biomedicine, environmental science and catalysis.

Research paper thumbnail of Palladium supported on Halloysite-triazolium salts as catalyst for ligand free Suzuki cross-coupling in water under microwave irradiation

Journal of Molecular Catalysis A: Chemical, 2015

Highlights: 1. Triazolium materials were obtained by subsequent click reactions. 2. High loaded t... more Highlights: 1. Triazolium materials were obtained by subsequent click reactions. 2. High loaded triazolium salt framework permitted the immobilization of Pd in high loading. 3. Catalyst was employed successfully in the Suzuki reaction in water under MW irradiation. 4. In this way Suzuki cross coupling meets the purposes of Green Chemistry 5. The catalyst showed good recyclability without any loss in activity and negligible Pd leaching.

Research paper thumbnail of Lipase-catalyzed resolution of �-hydroxy selenides

Tetrahedron Asymmetry, 2006

Research paper thumbnail of Funzionalizzazione Della Superficie Dell’Allosite Mediante Riscaldamento a Microonde

Research paper thumbnail of Green conditions for the Suzuki reaction by using microwave irradiation and modified halloysite/Pd catalyst

Research paper thumbnail of ChemInform Abstract: Stereoselective Synthesis of Substituted Tetrahydropyran Rings via 6-exo and 6-endo Selenoetherification

Research paper thumbnail of Properties and Structural Studies of Multi-Wall Carbon Nanotubes-Phosphate Ester Hybrids

International Journal of Organic Chemistry, 2013

Long chain phosphate esters bearing at least one or two aryl groups have been synthesized and use... more Long chain phosphate esters bearing at least one or two aryl groups have been synthesized and used for the preparation of stable multi-walled carbon nanotube (MWCNT) hybrids. The non-covalent interaction ester/MWCNT has been investigated by several techniques (SEM, UV-vis, 31 P-NMR, RAMAN). The used phosphate ester derivatives demonstrated the ability to produce an excellent dispersion of MWCNT in CHCl 3. The obtained dispersions showed a great stability from one to at least three weeks in the range of concentration considered. Thermal analysis showed an increase in the decomposition temperature for the hybrids with respect to pristine MWCNT.

Research paper thumbnail of A joint experimental and ab initio study on the reactivity of several hydroxy selenides. Stereoselective synthesis of cis-disubstituted tetrahydrofurans via seleniranium ions

Tetrahedron, 2001

ÐThe reactivity of several hydroxy selenides bearing an ethereal chain with catalytic amounts of ... more ÐThe reactivity of several hydroxy selenides bearing an ethereal chain with catalytic amounts of perchloric acid in dichloromethane was investigated. Results showed that the position of the oxygen atom with respect to the seleniranium ring was crucial in order to get a good yield of the cyclized product. The factors on which yields of the 5-endo cyclization of the seleniranium ions depend were analysed by ab initio (HF/3-21G p) studies. An explanation of the different coordinating ability, towards the positively charged selenium atom, of the allylic OMe and homoallylic OH-2 groups was given.

Research paper thumbnail of Binding abilities of new cyclodextrin–cucurbituril supramolecular hosts

Supramolecular Chemistry, 2014

The accuracy of the Content should not be relied upon and should be independently verified with p... more The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden.

Research paper thumbnail of Kinetic study of methoxide-promoted elimination reactions of some 1,1,1-trichloro-2,2-bis(phenyl-substituted)ethanes

Journal of Physical Organic Chemistry, 2001

... Gianfranco Fontana,1 * Vincenzo Frenna, 1 Liliana Lamartina,2 Maria Concetta Natoli1 and Rena... more ... Gianfranco Fontana,1 * Vincenzo Frenna, 1 Liliana Lamartina,2 Maria Concetta Natoli1 and Renato Noto1 ... The oil obtained was chromatographed on silica gel, employing light petro-leum (bp 40–60°C)–ethyl acetate (80:20) as eluent, gave pure 1d (yield 55%), as white ...

Research paper thumbnail of An analysis of 13C nuclear magnetic resonance substituent chemical shifts in 4- and 5-substituted thiophene-2-carboxylic acids by linear free energy relationships

Journal of the Chemical Society, Perkin Transactions 2, 1987

... Renato Noto lstituto di Chimica Organica, Via Archirafi 20, Palermo 90 723, ltalia Liliana La... more ... Renato Noto lstituto di Chimica Organica, Via Archirafi 20, Palermo 90 723, ltalia Liliana Lamartina * lstituto di Chimica Farmaceutica e Tossicologica, Via Archirafi 32, Palermo 90 123, ltalia Caterina Arnone and Domenico Spinelli lstituto di Scienze Chimiche, Facolta di ...

Research paper thumbnail of Protonation of some substituted phenylthiophen-2-ylmethanones in sulfuric acid

Journal of the Chemical Society, Perkin Transactions 2, 1996

ABSTRACT

Research paper thumbnail of Recyclable Organocatalysts in Asymmetric Reactions

Research paper thumbnail of Kinetics of the reactions of some 5-bromo-2-nitro-3-R-thiophens, 3,4-dibromo-2-nitro-5-R-thiophens, 3-bromo-2-nitro-5-R-thiophens, and 2-bromo-3-nitro-5-R-thiophens with nucleophiles in methanol

Journal of the Chemical Society, Perkin Transactions 2, 1982

ABSTRACT

Research paper thumbnail of Protonation of some 3-, 4-, and 5-substituted thiophen-2-carboxamides

Journal of the Chemical Society, Perkin Transactions 2, 1982

ABSTRACT

Research paper thumbnail of Kinetic and thermodynamic control in the intramolecular hydroxyl capture of seleniranium ions

Tetrahedron Letters, 1999

The formation of tetrahydrofurans and tetrahydropyrans by acid catalyzed cyclization of hydroxy s... more The formation of tetrahydrofurans and tetrahydropyrans by acid catalyzed cyclization of hydroxy selenides can be explained by kinetic and thermodynamic control. The tetrahydropyrans from the hybrid 7-endo/6-exo cyclization are the thermodynamic products of the acid catalyzed cyclization of hydroxy selenides 1, whereas the tetrahydrofurans from the 5-exo cyclization are the kinetic products.

Research paper thumbnail of Mass spectra of some 2- and 4-substituted thiophenecarboxylic acids

Organic Mass Spectrometry, 1983

Mass Spectra of Some 2and 4-Substituted Thiophenecarboxylic Acids Following the research work on ... more Mass Spectra of Some 2and 4-Substituted Thiophenecarboxylic Acids Following the research work on mass spectra of thiophenic compounds,'-' we report here the electron impact mass spectra at 70eV of some 2-and 4-substituted thiophene-3-carboxylic acids (1-23) with the aim of comparing the fragmentations observed with those of the corresponding 3-substituted thiophene-2-carboxylic acids?

Research paper thumbnail of A quantitative study of substituent effects on oxidative cyclization of some 2-aryl-substituted aldehyde thiosemicarbazones induced by ferric chloride and cupric perchlorate

Journal of Heterocyclic Chemistry, 1999

ABSTRACT As a development of our previous work, we performed a kinetic study of the oxidative cyc... more ABSTRACT As a development of our previous work, we performed a kinetic study of the oxidative cyclization reaction of some 2,4-diaryl-substituted aldehyde thiosemicarbazones 1a-n induced by ferric chloride and by cupric perchlorate. The results of cyclization of 1a-n were compared to those of the corresponding 2-methyl derivatives. The kinetic data were analyzed by means of the Hammett's equation.

Research paper thumbnail of Acetal formation from formylthiophene-2-carboxylic acids and recalculation of σ I and σ R substituent constants of the acetal group by 13 C NMR chemical shifts

Journal of Heterocyclic Chemistry, 1988

Research paper thumbnail of Halloysite Nanotubes: Smart Nanomaterials in Catalysis

Catalysts, 2022

The use of clay minerals as catalyst is renowned since ancient times. Among the different clays u... more The use of clay minerals as catalyst is renowned since ancient times. Among the different clays used for catalytic purposes, halloysite nanotubes (HNTs) represent valuable resources for industrial applications. This special tubular clay possesses high stability and biocompatibility, resistance against organic solvents, and most importantly be available in large amounts at a low cost. Therefore, HNTs can be efficiently used as catalysts themselves or supports for metal nanoparticles in several catalytic processes. This review reports a comprehensive overview of the relevant advances in the use of halloysite in catalysis, focusing the attention on the last five years.

Research paper thumbnail of Past, Present and Future Perspectives on Halloysite Clay Minerals

Molecules, 2020

Halloysite nanotubes (HNTs), clay minerals belonging to the kaolin groups, are emerging nanomater... more Halloysite nanotubes (HNTs), clay minerals belonging to the kaolin groups, are emerging nanomaterials which have attracted the attention of the scientific community due to their interesting features, such as low-cost, availability and biocompatibility. In addition, their large surface area and tubular structure have led to HNTs’ application in different industrial purposes. This review reports a comprehensive overview of the historical background of HNT utilization in the last 20 years. In particular it will focus on the functionalization of the surfaces, both supramolecular and covalent, following applications in several fields, including biomedicine, environmental science and catalysis.

Research paper thumbnail of Palladium supported on Halloysite-triazolium salts as catalyst for ligand free Suzuki cross-coupling in water under microwave irradiation

Journal of Molecular Catalysis A: Chemical, 2015

Highlights: 1. Triazolium materials were obtained by subsequent click reactions. 2. High loaded t... more Highlights: 1. Triazolium materials were obtained by subsequent click reactions. 2. High loaded triazolium salt framework permitted the immobilization of Pd in high loading. 3. Catalyst was employed successfully in the Suzuki reaction in water under MW irradiation. 4. In this way Suzuki cross coupling meets the purposes of Green Chemistry 5. The catalyst showed good recyclability without any loss in activity and negligible Pd leaching.

Research paper thumbnail of Lipase-catalyzed resolution of �-hydroxy selenides

Tetrahedron Asymmetry, 2006

Research paper thumbnail of Funzionalizzazione Della Superficie Dell’Allosite Mediante Riscaldamento a Microonde

Research paper thumbnail of Green conditions for the Suzuki reaction by using microwave irradiation and modified halloysite/Pd catalyst

Research paper thumbnail of ChemInform Abstract: Stereoselective Synthesis of Substituted Tetrahydropyran Rings via 6-exo and 6-endo Selenoetherification

Research paper thumbnail of Properties and Structural Studies of Multi-Wall Carbon Nanotubes-Phosphate Ester Hybrids

International Journal of Organic Chemistry, 2013

Long chain phosphate esters bearing at least one or two aryl groups have been synthesized and use... more Long chain phosphate esters bearing at least one or two aryl groups have been synthesized and used for the preparation of stable multi-walled carbon nanotube (MWCNT) hybrids. The non-covalent interaction ester/MWCNT has been investigated by several techniques (SEM, UV-vis, 31 P-NMR, RAMAN). The used phosphate ester derivatives demonstrated the ability to produce an excellent dispersion of MWCNT in CHCl 3. The obtained dispersions showed a great stability from one to at least three weeks in the range of concentration considered. Thermal analysis showed an increase in the decomposition temperature for the hybrids with respect to pristine MWCNT.

Research paper thumbnail of A joint experimental and ab initio study on the reactivity of several hydroxy selenides. Stereoselective synthesis of cis-disubstituted tetrahydrofurans via seleniranium ions

Tetrahedron, 2001

ÐThe reactivity of several hydroxy selenides bearing an ethereal chain with catalytic amounts of ... more ÐThe reactivity of several hydroxy selenides bearing an ethereal chain with catalytic amounts of perchloric acid in dichloromethane was investigated. Results showed that the position of the oxygen atom with respect to the seleniranium ring was crucial in order to get a good yield of the cyclized product. The factors on which yields of the 5-endo cyclization of the seleniranium ions depend were analysed by ab initio (HF/3-21G p) studies. An explanation of the different coordinating ability, towards the positively charged selenium atom, of the allylic OMe and homoallylic OH-2 groups was given.

Research paper thumbnail of Binding abilities of new cyclodextrin–cucurbituril supramolecular hosts

Supramolecular Chemistry, 2014

The accuracy of the Content should not be relied upon and should be independently verified with p... more The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden.