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Updated: Feb 12, 2026

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Ciclización/Sulfonilación catalizada por el paladio que permite el acceso a 2-Pirrolidinonona-Sulfonas Alilicas

Qing Li^1,2, Ying Tian¹, Ya-Nan Jia¹

¹Department of Chemistry, Capital Normal University, Beijing 100048, China.

The Journal of organic chemistry

|February 11, 2026

Resumen

Este estudio introduce una nueva reacción catalizada por paladio para la síntesis de sulfonos alilicos funcionalizados con 2-pirrolidinonona utilizando ditionita de sodio (Na2S2O4) como doble fuente de dióxido de azufre y donante de electrones.

Área de la Ciencia:

Química orgánica es la química orgánica.
La catálisis de la catálisis.
Química del azufre Química del azufre

Sus antecedentes:

Las sulfonas alilicas son valiosos intermediarios sintéticos.
Los métodos eficientes para su síntesis, en particular los que incorporan motivos heterocíclicos, son muy buscados.
Las reacciones catalizadas por el paladio ofrecen potentes herramientas para la formación de enlaces C-C y C-heteroatomo.

Objetivo del estudio:

Desarrollar una nueva reacción de ciclización/sulfonilación catalizada por el paladio.
Para permitir la síntesis de 2-pirrolidinonona y sulfonas alilicas funcionalizadas.
Para utilizar la ditionita de sodio como un reactivo barato y eficaz.

Principales métodos:

Reacción catalizada por paladio de N-alilbromoacetamidas con ditionita de sodio y ésteres de alilo.
La inserción de dióxido de azufre en un producto intermedio.
Ciclización radical y sustitución alilica.

Principales resultados:

Síntesis exitosa de 2-pirrolidinonona-sulfonas alilicas funcionalizadas.
Amplio alcance de sustrato y excelente tolerancia al grupo funcional.
Se logra una selectividad exclusiva (E) en la formación de sulfonos alílicos.
La ditionita de sodio desempeñó un doble papel como fuente de SO2 y donante de un solo electrón.

Conclusiones:

Se ha establecido un método novedoso y eficiente catalizado por Pd para sintetizar sulfonas alílicas.
La reacción proporciona acceso a valiosos compuestos funcionalizados con 2-pirrolidinonona.
El uso de ditionita de sodio ofrece un enfoque rentable y sostenible.

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