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Novel method reduces aromatic alkynes and alkenes using phosphonic acid, indicating a cost-effective alternative to metal catalysts.
We report a novel metal-free method for selectively reducing aromatic alkynes and alkenes by using phosphonic acid. When combined with molecular iodine, this system reduces aromatic alkynes to the corresponding (E)-alkenes and alkanes in high yields. Additionally, various aromatic alkenes can be directly reduced with comparable efficiency. This protocol features low cost, simple conditions, and the avoidance of metal catalysts.
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Wang et al. (2026) studied this question.
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