Pedro Merino | University of Zaragoza (original) (raw)

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Papers by Pedro Merino

Research paper thumbnail of ChemInform Abstract: Experimental and Theoretical Study of the 1,3Dipolar Cycloaddition Between D-Glyceraldehyde Nitrones and Acrylates. Diastereoselective Approach to 4Hydroxy Pyroglutamic Acid Derivatives

Research paper thumbnail of An investigation of the Lewis acid mediated 1,3-dipolar cycloaddition between N-benzyl-C-(2-pyridyl)nitrone and allylic alcohol. Direct entry to isoxazolidinyl C-nucleosides

Organic & Biomolecular Chemistry

The cycloaddition reaction of N-benzyl C-(2-pyridyl) nitrone with allylic alcohol has been carrie... more The cycloaddition reaction of N-benzyl C-(2-pyridyl) nitrone with allylic alcohol has been carried out to obtain the corresponding 2-benzyl-3-(2-pyridyl)-5-hydroxymethylisoxazolidine. The influence of Lewis acids in the reaction has been studied and a complete 3,5-regioselectivity and cis diastereoselectivity was observed when the reaction was carried out with 1.0 equiv of AgOTf, [Ag(OClO3)(PPh2Me)] or Zn(OTf)2. Insight into the mechanism of the reaction has been obtained by isolating and characterizing (X-ray) the intermediate complexes. Also, a model based on both experimental and theoretical results is proposed.

Research paper thumbnail of Isoxazolidine analogues of pseudouridine: a new class of modified nucleosides

Tetrahedron, 2003

A new class of modified C-nucleosides has been synthesized according to the 1,3-dipolar cycloaddi... more A new class of modified C-nucleosides has been synthesized according to the 1,3-dipolar cycloaddition methodology. The obtained compounds are structurally related to natural pseudouridine, where the sugar moiety is replaced by an isoxazolidine ring. Different experimental conditions, and the effect of additives on the cycloaddition process, have been examined; the best results were obtained when the cycloaddition reaction was performed

Research paper thumbnail of Special issue: Selected papers from the 12th and 13th workshop on formal methods for industrial critical systems (FMICS 2007 and FMICS 2008), Berlin Germany, July 2007, and L’Aquila, Italy, September 2008

Science of Computer Programming

Research paper thumbnail of Preface to the special issue on Formal Methods for Industrial Critical Systems (FMICS 2007 + FMICS 2008)

Science of Computer Programming

We describe the first formal specification of a non-trivial subset of MPI, the dominant communica... more We describe the first formal specification of a non-trivial subset of MPI, the dominant communication API in high performance computing. Engineering a formal specification for a non-trivial concurrency API requires the right combination of rigor, executability, ...

Research paper thumbnail of Programming for Symbian OS

Research paper thumbnail of A DSS for reservoirs operation based on the execution of formal models

Research paper thumbnail of Dam management based on model checking techniques

Research paper thumbnail of Diastereo- and Enantioselective Synthesis of 1′-C-Branched N, O-Nucleosides

Nucleosides Nucleotides & Nucleic Acids, 2003

A synthetic approach towards 1′-C-branched N, O-nucleosides is reported, based on 1,3-dipolar cyc... more A synthetic approach towards 1′-C-branched N, O-nucleosides is reported, based on 1,3-dipolar cycloaddition of ethoxycarbonylnitrone. The asymmetric version of the process exploits the presence of a chiral auxiliary at the carbon atom of nitrone and leads to β-D and β-L nucleosides in good yields.

Research paper thumbnail of Homologation of L-Threonine to α-Epimer β-Amino-α,. gamma.-dihydroxy Aldehydes and Acids via Stereoselective Reduction of 2-Thiazolyl Amino Ketones

Cheminform, 1992

ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Research paper thumbnail of ChemInform Abstract: Recent Developments on Rotaxane-Based Shuttles

Cheminform, 2009

ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Research paper thumbnail of Homologation of L-threonine to ?-epimer ?-amino-?,?-dihydroxy aldehydes and acids via stereoselective reduction of 2-thiazolyl amino ketones

Journal of The Chemical Society, Chemical Communications, 1991

Research paper thumbnail of Recent Developments on Rotaxane-Based Shuttles

Current Organic Chemistry, 2009

Research paper thumbnail of Chelation and Non-chelation-Controlled Addition of 2-(Trimethylsilyl)thiazole to .alpha.Amino Aldehydes: Stereoselective Synthesis of the .beta.Amino.alpha.-hydroxy Aldehyde Intermediate for the Preparation of the Human Immunodeficiency Virus Proteinase Inhibitor Ro 31-8959

Journal of Organic Chemistry, 1995

... Alessandro Dondoni,* Daniela Perrone, and Pedro Merino? ... 7:3 cyclohexane-EtOAc) to give pu... more ... Alessandro Dondoni,* Daniela Perrone, and Pedro Merino? ... 7:3 cyclohexane-EtOAc) to give pure N-(tert-butoxycarbonyl)-N,O-isopropylidene-L-serinol (0.78 g, 93%): ID -24.1' (C 1.4, CHC13); 'H NMR (DMSO-&, 80 "C) 6 1.42 (8, 12 H), 1.47 (6, 3 H), 3.25 (ddd, 1 H, J = 5.5, 8.5 ...

Research paper thumbnail of ChemInform Abstract: Tunable Stereoselectivity in the Addition of 2-Lithiothiazole to L- Serinal Derived N-Benzyl Nitrone. Synthesis of C-2 Epimer 2,3Diamino 4-hydroxybutanals

Research paper thumbnail of Understanding Bond Formation in Polar One-Step Reactions. Topological Analyses of the Reaction between Nitrones and Lithium Ynolates

The Journal of organic chemistry, 2015

The mechanism of the reaction between nitrones and lithium ynolates has been studied using DFT me... more The mechanism of the reaction between nitrones and lithium ynolates has been studied using DFT methods at the M06-2X/cc-pVTZ/PCM=THF level. After the formation of a starting complex an without energy barrier, in which the lithium atom is coordinated to both nitrone and ynolate, the reaction takes place in one single kinetic step through a single transition structure. However, the formation of C-C and C-O bonds takes place sequentially through a typical two-stage, one-step process. A combined study of noncovalent interactions (NCIs) and electron localization function (ELFs) of selected points along the intrinsic reaction coordinate (IRC) of the reaction confirmed that, in the transition structure, only the C-C bond is being formed to some extent, whereas an electrostatic interaction is present between carbon and oxygen atoms previous to the formation of the C-O bond. Indeed, the formation of the second C-O bond only begins when the first C-C bond is completely formed without formatio...

Research paper thumbnail of ChemInform Abstract: Chelation- and Non-Chelation-Controlled Addition of 2-(Trimethylsilyl) thiazole to α-Amino Aldehydes: Stereoselective Synthesis of the . beta.-Amino-α-hydroxy Aldehyde Intermediate for the Preparation of the Human Immunodeficiency Virus Proteinase Inhibitor Ro 31-8959

Research paper thumbnail of ChemInform Abstract: Stereoselective Homologation-Amination of Aldehydes by Addition of Their Nitrones to C-2 Metalated Thiazoles. A General Entry to α- Amino Aldehydes and Aldehydes and Amino Sugars

Research paper thumbnail of Short term effect of ploughing a permanent pasture on N2O production from nitrification and denitrification

Research paper thumbnail of Stereochemistry of α-(tert-butoxycarbonylamino) hydroxylamines: 1H NMR analysis of hydroxylamines derived from 2-pyrrolidinyl nitrones

Research paper thumbnail of ChemInform Abstract: Experimental and Theoretical Study of the 1,3Dipolar Cycloaddition Between D-Glyceraldehyde Nitrones and Acrylates. Diastereoselective Approach to 4Hydroxy Pyroglutamic Acid Derivatives

Research paper thumbnail of An investigation of the Lewis acid mediated 1,3-dipolar cycloaddition between N-benzyl-C-(2-pyridyl)nitrone and allylic alcohol. Direct entry to isoxazolidinyl C-nucleosides

Organic & Biomolecular Chemistry

The cycloaddition reaction of N-benzyl C-(2-pyridyl) nitrone with allylic alcohol has been carrie... more The cycloaddition reaction of N-benzyl C-(2-pyridyl) nitrone with allylic alcohol has been carried out to obtain the corresponding 2-benzyl-3-(2-pyridyl)-5-hydroxymethylisoxazolidine. The influence of Lewis acids in the reaction has been studied and a complete 3,5-regioselectivity and cis diastereoselectivity was observed when the reaction was carried out with 1.0 equiv of AgOTf, [Ag(OClO3)(PPh2Me)] or Zn(OTf)2. Insight into the mechanism of the reaction has been obtained by isolating and characterizing (X-ray) the intermediate complexes. Also, a model based on both experimental and theoretical results is proposed.

Research paper thumbnail of Isoxazolidine analogues of pseudouridine: a new class of modified nucleosides

Tetrahedron, 2003

A new class of modified C-nucleosides has been synthesized according to the 1,3-dipolar cycloaddi... more A new class of modified C-nucleosides has been synthesized according to the 1,3-dipolar cycloaddition methodology. The obtained compounds are structurally related to natural pseudouridine, where the sugar moiety is replaced by an isoxazolidine ring. Different experimental conditions, and the effect of additives on the cycloaddition process, have been examined; the best results were obtained when the cycloaddition reaction was performed

Research paper thumbnail of Special issue: Selected papers from the 12th and 13th workshop on formal methods for industrial critical systems (FMICS 2007 and FMICS 2008), Berlin Germany, July 2007, and L’Aquila, Italy, September 2008

Science of Computer Programming

Research paper thumbnail of Preface to the special issue on Formal Methods for Industrial Critical Systems (FMICS 2007 + FMICS 2008)

Science of Computer Programming

We describe the first formal specification of a non-trivial subset of MPI, the dominant communica... more We describe the first formal specification of a non-trivial subset of MPI, the dominant communication API in high performance computing. Engineering a formal specification for a non-trivial concurrency API requires the right combination of rigor, executability, ...

Research paper thumbnail of Programming for Symbian OS

Research paper thumbnail of A DSS for reservoirs operation based on the execution of formal models

Research paper thumbnail of Dam management based on model checking techniques

Research paper thumbnail of Diastereo- and Enantioselective Synthesis of 1′-C-Branched N, O-Nucleosides

Nucleosides Nucleotides & Nucleic Acids, 2003

A synthetic approach towards 1′-C-branched N, O-nucleosides is reported, based on 1,3-dipolar cyc... more A synthetic approach towards 1′-C-branched N, O-nucleosides is reported, based on 1,3-dipolar cycloaddition of ethoxycarbonylnitrone. The asymmetric version of the process exploits the presence of a chiral auxiliary at the carbon atom of nitrone and leads to β-D and β-L nucleosides in good yields.

Research paper thumbnail of Homologation of L-Threonine to α-Epimer β-Amino-α,. gamma.-dihydroxy Aldehydes and Acids via Stereoselective Reduction of 2-Thiazolyl Amino Ketones

Cheminform, 1992

ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Research paper thumbnail of ChemInform Abstract: Recent Developments on Rotaxane-Based Shuttles

Cheminform, 2009

ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Research paper thumbnail of Homologation of L-threonine to ?-epimer ?-amino-?,?-dihydroxy aldehydes and acids via stereoselective reduction of 2-thiazolyl amino ketones

Journal of The Chemical Society, Chemical Communications, 1991

Research paper thumbnail of Recent Developments on Rotaxane-Based Shuttles

Current Organic Chemistry, 2009

Research paper thumbnail of Chelation and Non-chelation-Controlled Addition of 2-(Trimethylsilyl)thiazole to .alpha.Amino Aldehydes: Stereoselective Synthesis of the .beta.Amino.alpha.-hydroxy Aldehyde Intermediate for the Preparation of the Human Immunodeficiency Virus Proteinase Inhibitor Ro 31-8959

Journal of Organic Chemistry, 1995

... Alessandro Dondoni,* Daniela Perrone, and Pedro Merino? ... 7:3 cyclohexane-EtOAc) to give pu... more ... Alessandro Dondoni,* Daniela Perrone, and Pedro Merino? ... 7:3 cyclohexane-EtOAc) to give pure N-(tert-butoxycarbonyl)-N,O-isopropylidene-L-serinol (0.78 g, 93%): ID -24.1' (C 1.4, CHC13); 'H NMR (DMSO-&, 80 "C) 6 1.42 (8, 12 H), 1.47 (6, 3 H), 3.25 (ddd, 1 H, J = 5.5, 8.5 ...

Research paper thumbnail of ChemInform Abstract: Tunable Stereoselectivity in the Addition of 2-Lithiothiazole to L- Serinal Derived N-Benzyl Nitrone. Synthesis of C-2 Epimer 2,3Diamino 4-hydroxybutanals

Research paper thumbnail of Understanding Bond Formation in Polar One-Step Reactions. Topological Analyses of the Reaction between Nitrones and Lithium Ynolates

The Journal of organic chemistry, 2015

The mechanism of the reaction between nitrones and lithium ynolates has been studied using DFT me... more The mechanism of the reaction between nitrones and lithium ynolates has been studied using DFT methods at the M06-2X/cc-pVTZ/PCM=THF level. After the formation of a starting complex an without energy barrier, in which the lithium atom is coordinated to both nitrone and ynolate, the reaction takes place in one single kinetic step through a single transition structure. However, the formation of C-C and C-O bonds takes place sequentially through a typical two-stage, one-step process. A combined study of noncovalent interactions (NCIs) and electron localization function (ELFs) of selected points along the intrinsic reaction coordinate (IRC) of the reaction confirmed that, in the transition structure, only the C-C bond is being formed to some extent, whereas an electrostatic interaction is present between carbon and oxygen atoms previous to the formation of the C-O bond. Indeed, the formation of the second C-O bond only begins when the first C-C bond is completely formed without formatio...

Research paper thumbnail of ChemInform Abstract: Chelation- and Non-Chelation-Controlled Addition of 2-(Trimethylsilyl) thiazole to α-Amino Aldehydes: Stereoselective Synthesis of the . beta.-Amino-α-hydroxy Aldehyde Intermediate for the Preparation of the Human Immunodeficiency Virus Proteinase Inhibitor Ro 31-8959

Research paper thumbnail of ChemInform Abstract: Stereoselective Homologation-Amination of Aldehydes by Addition of Their Nitrones to C-2 Metalated Thiazoles. A General Entry to α- Amino Aldehydes and Aldehydes and Amino Sugars

Research paper thumbnail of Short term effect of ploughing a permanent pasture on N2O production from nitrification and denitrification

Research paper thumbnail of Stereochemistry of α-(tert-butoxycarbonylamino) hydroxylamines: 1H NMR analysis of hydroxylamines derived from 2-pyrrolidinyl nitrones

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