An Iron‐Catalyzed Three‐Component Radical Cascade Cyclization to Access Cyanoalkylsulfonyl Quinolino‐Quinazolinones

An iron(II)‐catalyzed cascade reaction, involving cyanoalkylsulfonylation and cyclization, has been devised to enable the synthesis of functionalized sulfonylated quinolino‐quinazolinone alkyl nitriles. This three‐component radical transformation exhibits excellent chemo‐ and regioselectivity while functioning without the need for external oxidizing or reducing agents. The cost‐effectiveness of this catalytic system, together with its broad substrate application, which includes drug molecule derivatives, make this approach efficient and adaptable.