Video Experimental Relacionado

Updated: Jun 10, 2026

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions

Published on: October 11, 2013

Síntesis total de la desferrisalmicina B en su conjunto

Li Dong¹, John M Roosenberg, Marvin J Miller

¹Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, IN 46556-5670, USA.

Journal of the American Chemical Society

|December 12, 2002

Resumen

Los investigadores lograron la primera síntesis total del antibiótico sideróforo desferrisalmycin B. Este avance también asigna la configuración desconocida del estereocentro, allanando el camino para la síntesis de compuestos relacionados con la salmicina.

Área de la Ciencia:

Química orgánica es la química orgánica.
Química Medicinal La Química Medicinal es el campo de la Química Medicinal.
Síntesis de Productos Naturales.

Sus antecedentes:

Los antibióticos sideróforos son cruciales para combatir las infecciones bacterianas.
La desferrisalmicina B es un antibiótico sideróforo de origen natural con potenciales aplicaciones terapéuticas.
La síntesis total y la asignación estereoquímica de la desferrisalmicina B son esenciales para una mayor investigación y desarrollo.

Objetivo del estudio:

Para lograr la primera síntesis total de la desferrisalmicina B.
Para asignar la configuración del estereocentro desconocido en la desferrisalmicina B.
Desarrollar una estrategia sintética aplicable a otros análogos de la salmicina.

Principales métodos:

Dihidroxilación estereoselectiva para construir el núcleo amino-heptopiranósido.
Reacción de Mitsunobu modificada por Bose para las formaciones de enlaces clave.
Estrategia sintética convergente para el ensamblaje eficiente.

Principales resultados:

El éxito de la síntesis total de la desferrisalmicina B.
Determinación de la configuración absoluta del estereocentro previamente desconocido.
Establecimiento de una ruta sintética versátil.

Conclusiones:

La estrategia sintética desarrollada permite la preparación de desferrisalmicina B y las salmicinas relacionadas.
Este trabajo proporciona acceso a nuevos análogos de antibióticos sideróforos para el descubrimiento de fármacos.
La asignación estereoquímica es fundamental para comprender las relaciones estructura-actividad.

Más Videos Relacionados

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy

Published on: June 6, 2025

MALDI-ToF MS Method for the Characterization of Synthetic Polymers with Varying Dispersity and End Groups

MALDI-ToF MS Method for the Characterization of Synthetic Polymers with Varying Dispersity and End Groups

Published on: October 3, 2025

Videos de Conceptos Relacionados

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.

Aldol Condensation with β-Diesters: Knoevenagel Condensation

Aldol Condensation with β-Diesters: Knoevenagel Condensation

The Knoevenagel condensation is an aldol-type reaction involving the condensation of aldehydes or ketones with active methylene compounds such as β-diesters to produce substituted olefins.

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.

Composite Bodies

Composite Bodies

A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...

EDTA: Conditional Formation Constant

EDTA: Conditional Formation Constant

Each EDTA molecule has six binding sites: four carboxyl groups and two amino groups. The fully protonated form of EDTA is represented as H6Y2+. However, it can exist in different forms, H5Y+, H4Y, H3Y−, H2Y2−, and HY3−, depending on the pH of the solution. In very basic solutions with pH > 10.17, the fully deprotonated form, Y4−, is the predominant species that readily complexes with metal ions in a 1:1 ratio.
For the equilibrium reaction of the metal with the Y4− form of EDTA, the formation...

EDTA: Auxiliary Complexing Reagents

EDTA: Auxiliary Complexing Reagents

EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...