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Ester borónico habilitado [2 + 2] - Adiciones cíclicas por coordinación temporal: síntesis de Artocamina J y

Yanyao Liu¹, Dongshun Ni¹, M Kevin Brown¹

¹Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States.

Journal of the American Chemical Society

|October 6, 2022

Resumen

Este estudio introduce una nueva reacción de cicloadición fotosensibilizada para la síntesis de ciclobutilboronatos a partir de alquenilboronatos y alcoholes alílicos. El método logra un alto control estéreo y regional, lo que permite la síntesis de productos naturales complejos.

Área de la Ciencia:

Química orgánica
La fotoquímica
Metodología sintética

Sus antecedentes:

Las reacciones de cicloadición son fundamentales en la síntesis orgánica.
Los ésteres de boronato son productos intermedios sintéticos versátiles.
El desarrollo de métodos eficientes para la formación de anillos de ciclobutano es un desafío.

Objetivo del estudio:

Desarrollar una nueva estrategia de cicloadición fotosensibilizada.
Para sintetizar diversos boronatos de ciclobutilo.
Demostrar la utilidad de los productos en la síntesis de productos naturales.

Principales métodos:

Cicloadición fotosensibilizada de alquenilboronatos y alcoholes alelicos.
Coordinación temporal del alcohol alílico con la unidad de éster de boronato (Bpin).
La vía de reacción intramolecular.

Principales resultados:

Síntesis exitosa de varios ciclobutilboronatos.
Se logran altos niveles de control estéreo y regional.
Utilidad demostrada en la síntesis de artochamina J y piperarborenina B.

Conclusiones:

La estrategia presentada ofrece una vía eficiente hacia los ciclobutilboronatos.
La coordinación temporal es crucial para el control de la reacción.
Los conductos de carga son bloques de construcción valiosos para moléculas complejas.

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