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This process demonstrates an innovative cross coupling of CC bonds in biphenylene, suggesting new routes for synthesis with peroxides.
A nickel‐catalyzed carboalkoxylation of the biphenylene CC σ‐bond with arylboronates and peroxides has been developed to form the corresponding ring‐opening difunctionalization products. The key to success is the use of acetal‐based, electron‐deficient peroxides, which enable the otherwise challenging CO cross coupling with nickel catalysts even under thermal conditions. A similar nickel catalysis is applicable to a related borylalkoxylation by replacement of arylboronates with danB–Bpin.
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Inoue et al. (2025) studied this question.
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