Claisen rearrangement enabled efficient access to biaryl phenols

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Hydroxypyranone systems are important scaffolds in medicinal chemistry.
• Efficient synthesis of complex biaryl phenols remains a challenge.

Purpose of the Study:

• To develop a rapid and efficient method for C2-arylation of hydroxypyranone systems.
• To synthesize previously inaccessible biaryl phenols.

Main Methods:

• Utilizing a reductive iodonio-Claisen rearrangement (RICR) of λ³-iodanes.
• Integrating rearrangement products with a tandem Claisen reaction.

Main Results:

• Achieved rapid C2-arylation of hydroxypyranone systems.
• Successfully synthesized a series of biaryl phenols.
• Demonstrated the efficiency of the integrated rearrangement and tandem Claisen reaction.

Conclusions:

• The RICR method provides a powerful new route to functionalized hydroxypyranones.
• This strategy significantly expands the accessibility of complex biaryl phenol structures.