Photocatalytic Deoxygenative Alkylation of C(sp3)−H Bonds Using Sulfonylhydrazones

05 October 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


The ability to construct C(sp3)–C(sp3) bonds from easily accessible reagents is a crucial, yet challenging endeavor for synthetic organic chemists. Herein, we report the realization of such a cross-coupling reaction, which combines N-sulfonyl hydrazones and C(sp3)–H donors through a diarylketone-enabled photocatalytic Hydrogen Atom Transfer and a subsequent fragmentation of the obtained alkylated hydrazide. This mild and metal-free protocol was employed to prepare a wide array of alkyl-alkyl cross-coupled products and is tolerant of a variety of functional groups. The application of this chemistry further provides a preparatively useful route to various medicinally-relevant compounds, such as homobenzylic ethers, aryl ethyl amines, β-amino acids and other moieties which are commonly encountered in approved pharmaceuticals, agrochemicals and natural products.


sulfonyl hydrazones
hydrogen atom transfer
C(sp3)-H alkylation
deoxygenative coupling
beta-Amino Acids

Supplementary materials

Supporting Information
Experimental procedures, comnpound characterization and spectroscopical data


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