Structure-function relationships in aryl diazirines reveal optimal design features to maximize C-H insertion

Area of Science:

• Organic Chemistry
• Photochemistry
• Materials Science

Background:

• Diazirines are versatile precursors for carbene generation via photochemical, thermal, or electrical stimuli.
• Carbenes readily insert into C-H, O-H, and N-H bonds, enabling applications in chemical biology and materials science.

Purpose of the Study:

• To conduct a comprehensive survey of diazirine structure-function relationships, focusing on thermal activation.
• To understand how electronic properties influence the activation energy and temperature of aryl diazirines.

Main Methods:

• Utilized a combination of experimental techniques and computational modeling.
• Investigated aryl diazirines with systematically varied electronic properties.

Main Results:

• Demonstrated the ability to tune diazirine activation energy and temperature through rational electronic modification.
• Showcased significantly enhanced C-H insertion efficacy for electron-rich diazirines under both thermal and photochemical conditions.

Conclusions:

• Rational design of diazirine electronic properties is key to controlling carbene generation and reactivity.
• Electron-rich diazirines offer improved performance for applications like chemical probes and polymer crosslinking.