Alkyl radical triggered in situ SO₂-capture cascades

Area of Science:

• Organic Chemistry
• Reaction Mechanisms
• Catalysis

Background:

• Sulfur dioxide (SO2) capture and utilization remain critical challenges in chemistry.
• Developing efficient methods for incorporating SO2 into organic frameworks is highly desirable.

Purpose of the Study:

• To document an unprecedented in situ SO2-capture cascade reaction triggered by alkyl radicals.
• To investigate the mechanism of SO2 release and subsequent fixation.
• To demonstrate the synthesis of diverse alkylsulfonyl substituted polycyclic compounds.

Main Methods:

• Mechanistic investigations using radical chemistry.
• In situ SO2 capture and cascade reaction.
• Synthesis of polycyclic compounds.

Main Results:

• An in situ SO2-capture cascade reaction triggered by alkyl radicals was successfully demonstrated.
• SO2 was released in situ and subsequently fixed into polycyclic small molecules.
• A wide range of alkylsulfonyl substituted polycyclic compounds were prepared with high yields and good functional group tolerance.

Conclusions:

• The study presents a novel and efficient method for SO2 capture and utilization.
• The developed cascade reaction offers a versatile route to valuable alkylsulfonyl-containing polycyclic molecules.
• This work provides new insights into radical-mediated cascade reactions involving SO2.