A photocatalytic approach for carbon isotope exchange is reported. Utilizing [¹³C]CO₂ and [¹⁴C]CO₂ as primary C1 sources, this protocol allows the insertion of the desired carbon isotope into phenyl acetic acids without the need for structural modifications or prefunctionalization in one single step. The exceptionally mild conditions required for this traceless transformation are in stark contrast with those for previous methods requiring the use of harsh thermal conditions.

中文翻译：

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CO ₂与碳同位素交换的光化学策略

报道了用于碳同位素交换的光催化方法。利用[ ¹³ C] CO ₂和[ ¹⁴ C] CO ₂作为主要的C1来源，该方案可将所需的碳同位素插入苯基乙酸中，而无需在单个步骤中进行结构修饰或预功能化。这种无痕转化所需要的异常温和的条件与先前要求使用苛刻的热条件的方法形成了鲜明的对比。