Results 1 to 10 of about 7,003 (167)

Synthesis of New Polyheterocyclic Pyrrolo[3,4-b]pyridin-5-ones via an Ugi-Zhu/Cascade/Click Strategy

open access: yesMolecules, 2023
A diversity-oriented synthesis (DOS) of two new polyheterocyclic compounds was performed via an Ugi-Zhu/cascade (N-acylation/aza Diels-Alder cycloaddition/decarboxylation/dehydration)/click strategy, both step-by-step to optimize all involved ...
Roberto E. Blanco-Carapia   +4 more
doaj   +1 more source

2-Benzyl-3-morpholino-7-(thiophen-2-yl)-6-(thiophen-2-ylmethyl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyridin-5-one

open access: yesMolbank, 2022
The new polyheterocyclic compound 2-benzyl-3-morpholino-7-(thiophen-2-yl)-6-(thiophen-2-ylmethyl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyridin-5-one (1) was synthesized via a one-pot process involving an Ugi-Zhu three-component reaction coupled to a cascade aza ...
Ivette Morales-Salazar   +3 more
doaj   +1 more source

Quinoline Derivatives: Promising Antioxidants with Neuroprotective Potential

open access: yesAntioxidants, 2023
Quinoline has been proposed as a privileged molecular framework in medicinal chemistry. Although by itself it has very few applications, its derivatives have diverse biological activities.
Luis Felipe Hernández-Ayala   +2 more
doaj   +1 more source

Ferrocenyl-bis-(1-(4-benzyl-5-morpholinooxazol-2-yl)-N-(4-(trifluoromethyl)benzyl)methanamine)

open access: yesMolbank, 2022
The new bis-heterocyclic compound ferrocenyl-bis-(1-(4-benzyl-5-morpholinooxazol-2-yl)-N-(4-(trifluoromethyl)benzyl)methanamine) (1) was synthesized in 73% overall yield in 1.5 hours via a pseudo-repetitive Ugi-Zhu five-component reaction, starting from ...
Roberto E. Blanco-Carapia   +3 more
doaj   +1 more source

Composición taxonómica y afinidad por un sustrato de macroalgas marinas conspicuas del Parque Nacional Arrecifes de Cozumel, Quintana Roo, México

open access: yesActa Botanica Mexicana, 2023
Antecedentes y Objetivos: Los arrecifes del Parque Nacional Arrecifes de Cozumel constituyen una de las principales formaciones arrecifales de México.
Anahi Carranza Ramirez   +2 more
doaj   +1 more source

Biosensing Membrane Base on Ferulic Acid and Glucose Oxidase for an Amperometric Glucose Biosensor

open access: yesMolecules, 2021
A biosensing membrane base on ferulic acid and glucose oxidase is synthesized onto a carbon paste electrode by electropolymerization via cyclic voltammetry in aqueous media at neutral pH at a single step.
Gabriela Valdés-Ramírez, Laura Galicia
doaj   +1 more source

Synthesis of a Symmetrical tris-Tetrazole as Isostere of a Tricarboxylic Acid: Behind New Tridentate Ligands for MOFs

open access: yesChemistry Proceedings, 2021
The synthesis and characterization of three tridentate ligands for new MOFs are described. A triple aminolysis of the 1,3,5-tribenzoyl chloride with p-aminobenzoic acid gave the tricarboxylic acid 3 in 90% yield.
Julio C. Flores-Reyes   +8 more
doaj   +1 more source

Contraofensiva burguesa a las organizaciones obreras. La resolución de la crisis hegemónica, Entre Ríos 1919-1922

open access: yesSociohistórica, 2022
Desde 1919 la burguesía argentina respondió a las luchas obreras con diferentes mecanismos de contención social, donde la represión tuvo un papel destacado. El presente trabajo trata de explicar los motivos, las coyunturas internas en el periodo y, desde
Rodolfo Matías Leyes
doaj   +1 more source

La calidad de las instituciones del sector público: una revisión crítica de los estudios sobre el «buen gobierno» y la «debilidad institucional»

open access: yesRevista CENTRA de Ciencias Sociales, 2023
Este artículo realiza un análisis comparado de varios enfoques que tratan la calidad de las instituciones en el sector público desde aportaciones de la ciencia política y algunas especialidades de las ciencias jurídicas.
Wilfrid Martínez-Sánchez   +1 more
doaj   +1 more source

En el recinto común dedicado a Apolo y Helios (Platón, Lg., 945 b-948 b)

open access: yesNova Tellus, 2021
En Leyes, 945 b-948 b, Platón introduce la figura de los eúthӯnoi o “correctores” y los relaciona directamente con el culto común de Helios y Apolo. Sostengo que, al hacer esto, el filósofo ha pretendido conectar la República y las Leyes en torno a la ...
Miguel Ángel Spinassi
doaj   +1 more source

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