Several new mono- and difluoromethylation reactions of cinnamic acids using an Eosin Y catalytic system are reported. An efficient alkene fluoromethylation of α,β-unsaturated carboxylic acids was accomplished under ambient temperature and metal-free conditions, with a wide range of functional group tolerance. A mechanism that involves a radical process is proposed for this reaction.

中文翻译：

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无金属条件下肉桂酸的可见光脱羧单和二氟甲基化

报道了使用曙红Y催化系统的肉桂酸的一些新的单和二氟甲基化反应。α，β-不饱和羧酸的有效烯烃氟甲基化是在环境温度和无金属条件下实现的，具有宽泛的官能团耐受性。对于该反应，提出了涉及自由基过程的机理。