Dialkylation of CF2 unit enabled by cobalt electron-shuttle catalysis

Changqing Rao, Tianze Zhang and Hanmin Huang ()
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Changqing Rao: University of Science and Technology of China
Tianze Zhang: University of Science and Technology of China
Hanmin Huang: University of Science and Technology of China

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract The incorporation of difluoromethylene (CF2) group into chemical molecules often imparts desirable properties such as lipophilicity, binding affinity, and thermal stability. Consequently, the increasing demand for gem-difluoroalkylated compounds in drug discovery and materials science has continued to drive the development of practical methods for their synthesis. However, traditional synthetic methods such as deoxofluorination often confront challenges including complicated substrate synthesis sequences and poor functional group compatibility. In this context, we herein report a metal electron-shuttle catalyzed, modular synthetic methodology for difluoroalkylated compounds by assembling two C(sp3) fragments across CF2 unit in a single step. The approach harnesses a difluoromethylene synthon as a biradical linchpin, achieving the construction of two C(sp3)-CF2 bonds through radical addition to two different π-unsaturated molecules. This catalytic protocol is compatible with broad range of coupling partners including diverse olefins, iminiums, and hydrazones, supporting endeavors in the efficient construction of C(sp3)-rich difluoroalkylated molecules.

Date: 2024
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DOI: 10.1038/s41467-024-51532-1

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