Results 71 to 80 of about 7,447 (129)

Cobalt‐Catalyzed C(sp3)H Carbonylation Enabled by Mo(CO)6

European Journal of Organic Chemistry, Volume 29, Issue 36, 24 September 2026.
Cobalt‐catalyzed carbonylative C(sp3)H cyclization of aliphatic amides using Mo(CO)6 as a solid CO surrogate enables efficient access to substituted succinimides under operationally simple conditions. The carbonylation of unactivated C(sp3)H bonds represents an attractive strategy for the synthesis of valuable carbonyl‐containing compounds.
Emma Duro, Inés Alonso, Juan Carlos Carretero, Nuria Rodríguez, Javier Adrio   +4 more
wiley   +1 more source

ROTENOIDES BIOACTIVOS DE LA RAÍZ DE Lonchocarpus pentaphyllus

Tecnociencia, 2005
  Mediante el fraccionamiento bio-dirigido del extracto hexánico de las raíces del Lonchocarpus pentaphyllus se aislaron cuatro rotenoides conocidos: milletona (1), milletosina (2), deguelina (3) y tephrosina (4).
Marcelino Gutiérrez G, Haydée Watson-Samudio, Eligio Vega A, Luis Cubilla R   +3 more
doaj  

Challenging the Bredt’s rule in an acid catalyzed cationic cyclization to get bicyclo[3.3.1]nonane derivatives

Nature Communications
Vinyl carbocations are long known in chemistry but remain less explored than common sp²-hybridized carbocations, and their synthetic applications are limited.
Olaya García-Pedrero, Pilar Pardo, Nerea Alberro, Fernando P. Cossío, Félix Rodríguez   +4 more
doaj   +1 more source

Estudio químico del phthirus pyrifolia "suelda con suelda"

Revista de Química, 1990
Se realizaron estudios químicos de los extractos con éter de petróleo ( 40-600C), clorofonno y etanol de Phthirus pyrifolia (HBK) Eichl, una especie semiparásita de la familia Lorantaceae.
Betty Chung Tong, Olga Lock de Ugaz
doaj  

Synthesis, crystal structure and absolute configuration of (3aS,4R,5S,7aR)-7-(but-3-en-1-yn-1-yl)-2,2-dimethyl-3a,4,5,7a-tetrahydro-2H-1,3-benzodioxole-4,5-diol

Acta Crystallographica Section E: Crystallographic Communications
The absolute configuration of the title compound, C13H16O4, determined as 1S,2R,3S,4R based on the synthetic pathway, was confirmed by single-crystal X-ray diffraction.
Alejandro Peixoto de Abreu Lima, Enrique Pandolfi, Valeria Schapiro, Leopoldo Suescun   +3 more
doaj   +1 more source

2, 4-Dinitrofenilhidrazonas de ß-halocetoesteres alilicos

Revista de Química, 1990
No contiene resumen.
Oscar Sánchez
doaj  

DNA Interactions and Biological Activity of 2,9-Disubstituted 1,10-Phenanthroline Thiosemicarbazone-Based Ligands and a 4-Phenylthiazole Derivative

Biology
Four 1,10-phenanthroline derivatives (1–4) were synthesized as potential telomeric DNA binders, three substituted in their chains with thiosemicarbazones (TSCs) and one 4-phenylthiazole derivative.
Álvaro Nicolás, Julia G. Quero, Marta Barroso, Zoila Gándara, Lourdes Gude   +4 more
doaj   +1 more source

Synthesis of 2,2-diphenyl-1,3,2-oxazaborolidin-5-one promoted by montmorillonite and microwaves: A green approach methodology

Results in Chemistry
Studies have shown that the heterocyclic molecules of the 2,2-diphenyl-1,3,2-oxazaborolidin-5-one (DPOXA) type have wide and varied biological activity with herbicidal, insecticidal, fungicidal, antibacterial, and apoptotic properties.
Rodrigo González-Castañeda, Omar Negrellos Correa, Raquel Gómez-Pliego, Alan Álvarez-Sánchez, Anuar Gómez-Tagle, Benjamín Velasco-Bejarano   +5 more
doaj   +1 more source

SÍNTESIS SELECTIVA DEL PRECURSOR DE COMPUESTOS BIOACTIVOS 4-METIL-2-QUINOLONA EMPLEANDO EL REACTIVO DE EATON

Avances en Ciencias e Ingeniería, 2019
In this paper the use of Eaton´s reagent for the selective synthesis of 4-methyl-2-quinolone is described, avoiding the use of mineral acids and expensive metal catalysts such as those described in the literature. This reagent is easily available and has
Gisela C. Muscia, Ayelen Luczywo, Juan P. Carnevale, Graciela Y. Buldain, Silvia E. Asís   +4 more
doaj  

Una nueva familia de módulos estructurales para el reconocimiento molecular

Revista de Química, 1998
Un conjunto de fenómenos gobernados por interacciones de naturaleza no covalente han dado lugar al concepto del Reconocimiento Molecular, fenómeno que es algo más que una simple asociación de dos entidades químicas.
Juana Robles Caycho
doaj