N-O Dual Functional Group Transposition via Energy Transfer Photocatalysis

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Photocatalysis

Background:

• Functional group translocation is key for streamlined synthesis and accessing novel molecular scaffolds.
• Single-group transposition is established, but dual functional group transposition (dFGT) is underdeveloped due to selectivity challenges.

Purpose of the Study:

• To develop a photocatalytic strategy for achieving dual functional group transposition (dFGT).
• To address the limitations of chemo- and regioselectivity in dFGT reactions.
• To expand the scope of dFGT to various alkyl derivatives and bond types.

Main Methods:

• Utilized a photocatalytic energy transfer (EnT) strategy for dFGT.
• Employed precisely regulated radical sorting to control migration and coupling sequences.
• Investigated N-O and N-N dFGT using activated and unactivated alkyl derivatives.
• Combined theoretical calculations and experimental studies to elucidate the reaction mechanism.

Main Results:

• Achieved dFGT through controlled radical sorting and sequential migration/coupling.
• Demonstrated applicability to both activated and unactivated alkyl derivatives for N-O dFGT.
• Elucidated a mechanism involving EnT-driven diradical generation, 1,2-migration, and radical coupling.
• Successfully extended the methodology to N-N dFGT, proving its versatility.

Conclusions:

• Developed a general photocatalytic EnT strategy for dFGT.
• Enabled efficient synthesis of complex molecular scaffolds via controlled dual functional group migration.
• Established a robust method applicable to N-O and N-N bond formations, broadening synthetic possibilities.