Inspired by the elegant work of Zhu and Xie, we report herein a visible light-mediated direct deoxygenation activation mechanism of aromatic carboxylic acids 1 with triphenylphosphine, which powers deoxygenative C-C coupling of a wide range of aromatic carboxylic acids with gem diborylalkene 2' and gem-Ar,Bpin-alkene 2 (Figure ). This protocol allows practical and friendly reaction conditions which significantly broadens the substrate scope and emphasizes the synthetic of β-keto-gem-diborylalkane 3-4. Remarkably, the synthetic robustness is supported by the latestage modification and subsequent diversification of several pharmaceutical compounds and bioactive carboxylic acids.