SO2-Mediated Decarboxylative C(sp3)-C(sp3) Coupling of Carboxylic Acids Enabled by Photoredox Catalysis
Jie Chen1,2, Yuyue Qiu2, Mengmeng Fu2
1Department of Central Laboratory, Affiliated Hospital of Jiaxing University, Jiaxing, P. R. China.
Abstract:
Herein, we report a photoredox-catalyzed, decarboxylative C(sp3)-C(sp3) coupling of carboxylic acids, facilitated by SO2 as a key oxidant. Alkyl radicals, generated via photoredox decarboxylation, undergo homocoupling under the mild oxidizing conditions provided by SO2. Mechanistic studies confirm that SO2 serves a crucial role in mediating the radical cross-coupling. This work pioneers an SO2-driven radical coupling strategy, offering a practical method for constructing C(sp3)-C(sp3) bonds and advancing synthetic applications in pharmaceutical research.
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