A metal-free and radical-free synthesis of heteroaromatic aldehydes was developed through aerobic oxidation of methyl groups in an I2/DMSO/O2 catalytic system. Under the reaction conditions, various functional groups such as methoxy, aldehyde, ester, nitro, amide, and halo (F, Cl, Br) groups were well tolerated. The bioactive compounds like chlorchinaldin derivative and papaverine were also oxidized
通过在I 2 / DMSO / O 2催化系统中对甲基进行好氧氧化,开发了杂芳醛的无金属和无自由基合成方法。在反应条件下,各种官能团如甲氧基,醛基,酯基,硝基,酰胺基和卤素(F,Cl,Br)基团均具有良好的耐受性。诸如氯霉素衍生物和罂粟碱的生物活性化合物也被氧化成相应的醛和酮。该反应提供了制备有价值的杂芳族醛的有效方法。
Catalytic Aerobic Photo‐oxidation of a Methyl Group on a Heterocycle to Produce an Aldehyde
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Homolytic CI Bond Cleavage caused by Irradiation with Visible Light
A new catalytic method was developed for photo‐oxidizing the methyl group on aromatic heterocycles such as benzothiazole, benzoxazole, and quinoline to produce the corresponding aldehyde. This is the first report of the metal‐free catalytic synthesis of benzothiazole‐2‐carboxaldehydes using molecular oxygen as the terminal oxidant.
Iodine-imine Synergistic Promoted Povarov-Type Multicomponent Reaction for the Synthesis of 2,2′-Biquinolines and Their Application to a Copper/Ligand Catalytic System
An efficient iodine-imine synergistic promoted Povarov-type multicomponent reaction was reported for the synthesis of a practical 2,2′-biquinoline scaffold. The tandem annulation has reconciled iodination, Kornblum oxidation, and Povarov aromatization, where the methyl group of the methyl azaarenes represents uniquely reactive input in the Povarov reaction. This method has broad substrate scope and