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31 results on '"Jaime C"'

1. ChemInform Abstract: Divergent Chemo-, Regio-, and Diastereoselective Normal Electron-Demand Povarov-Type Reactions with α-Oxo-ketene Dienophiles

Author

Juan-Carlos Castillo, Jairo Quiroga, Jaime C. Gálvez, Jean Rodriguez, Michel Rajzmann, and Yoann Coquerel

Subjects
chemistry.chemical_compound, chemistry, Ketene, Wolff rearrangement, General Medicine, Electron, Medicinal chemistry
Abstract

The reaction between electron-rich 2-aza-dienes (I), (IV), (VI), and (IX) and α-oxo-ketenes, derived from the Wolff rearrangement of 2-diazocycloalkane-diones such as (II) affords spiro hydropyridones (III) and (V) with good to excellent diastereoselectivity.

Published
2015
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2. ChemInform Abstract: Microwave-Assisted and Iodine Mediated Synthesis of 5-n-Alkyl-cycloalkane[d]-pyrazolo[3,4-b]pyridines from 5-Aminopyrazoles and Cyclic Ketones

Author

Jaime C. Gálvez, Rodrigo Abonia, Jairo Quiroga, and Braulio Insuasty

Subjects
chemistry.chemical_compound, Chemistry, chemistry.chemical_element, Organic chemistry, Regioselectivity, Alkyl cycloalkane, General Medicine, Condensation reaction, Iodine, Microwave assisted
Abstract

The unexpected cyclocondensation-aromatization reaction of 5-aminopyrazoles with cyclic ketones provides an easy, direct, and regioselective access to the title derivatives.

Published
2014
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4. ChemInform Abstract: An Efficient Synthesis of Pyrazolo[3,4-b]pyridine-4-spiroindolinones by a Three-Component Reaction of 5-Aminopyrazoles, Isatin, and Cyclic β-Diketones

Author

Alfredo Perez, Rodrigo Abonia, Jairo Quiroga, Sandra Portillo, Braulio Insuasty, and Jaime C. Gálvez

Subjects
chemistry.chemical_compound, Chemistry, Simple (abstract algebra), Component (thermodynamics), Isatin, Pyridine, General Medicine, Combinatorial chemistry
Abstract

A simple protocol is developed for the title reaction with the advantages of mild conditions and simple work-up.

Published
2011
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5. ChemInform Abstract: 5-Cyanoacetylpyrimidines as Intermediates for 7-Aryl-6-cyanopyrido[2,3-d]pyrimidin-5-ones

Author

Jorge Trilleras, Justo Cobo, Braulio Insuasty, Jaime C. Gálvez, Jairo Quiroga, Rodrigo Abonia, and Manuel Nogueras

Subjects
chemistry.chemical_compound, Chemistry, Aryl, General Medicine, Base (exponentiation), Medicinal chemistry, Catalysis
Abstract

The reactions of N4- and 5-cyanoacetyl derivates of 4-aminopyrimidines with aromatic aldehydes have yielded the N-(pyrimidin-4-yl)-3-arylacrylamides and the dihydropyrido[2,3-d]pyrimidines, respectively. The first reaction was a Claisen–Schmidt reaction catalyzed by base, and the second one proceeded via thermal cyclocondensation.

Published
2010
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6. ChemInform Abstract: C- and N-Cyanoacetylation of 6-Aminopyrimidines with Cyanoacetic Acid and Acetic Anhydride

Author

Jairo Quiroga, Justo Cobo, Rodrigo Abonia, Jorge Trilleras, Manuel Nogueras, Jaime C. Gálvez, Antonio Marchal, and Braulio Insuasty

Subjects
chemistry.chemical_compound, Acetic anhydride, Cyanoacetic acid, Chemistry, Group (periodic table), General Medicine, Medicinal chemistry
Abstract

A series of 6-aminopyrimidines are cyanoacetylated with a mixture of cyanoacetic acid and acetic anhydride. When pyrimidin-4(3H)-ones are used as substrates, the substitution occurs at C-5, however, when the substrates are substituted pyrimidines at the C-2 and C-4, the cyanoacetylation takes place at the exocyclic amino group.

Published
2009
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16. ChemInform Abstract: Preparation and Conformational Analysis of Severely Hindered β‐ Diketones. Dipole Moment Determinations and Theoretical Calculations.

Author

MORENO‐MANAS, M., primary, GONZALEZ, A., additional, JAIME, C., additional, LLORIS, M. E., additional, MARQUET, J., additional, MARTINEZ, A., additional, SIANI, A. C., additional, VALLRIBERA, A., additional, HERNANDEZ‐FUENTES, I., additional, REY‐STOLLE, M. F., additional, and SALOM, C., additional

Published
1991
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