Efficient Palladium-Catalyzed Synthesis of 2-Aryl Propionic Acids

Area of Science:

• Organic Chemistry
• Medicinal Chemistry

Background:

• 2-aryl propionic acids are a crucial class of compounds with significant anti-inflammatory properties.
• Existing synthesis methods can be multi-step, requiring extensive purification.

Purpose of the Study:

• To develop a streamlined, efficient synthesis for 2-aryl propionic acids.
• To explore a novel ligand for palladium-catalyzed cascade reactions.

Main Methods:

• A two-step, one-pot procedure was established.
• Utilized sequential palladium-catalyzed Heck coupling and hydroxycarbonylation.
• Employed the novel ligand neoisopinocampheyldiphenylphosphine (NISPCPP).

Main Results:

• Successfully synthesized various 2-aryl propionic acids, including naproxen and flurbiprofen.
• Achieved high regioselectivity and good product yields.
• The one-pot cascade avoided additional purification steps.

Conclusions:

• The developed method offers a flexible and efficient route to valuable 2-aryl propionic acids.
• The novel NISPCPP ligand is key to the success of this cascade transformation.
• This approach simplifies synthesis and reduces waste.