Furfural and its derivatives underwent alkenylation with alkynes via α‐C−H activation in the presence of a palladium/carboxylic acid catalyst to give the corresponding single and double alkenylated products. The reactive aldehyde group remained intact during this reaction. This catalytic system allowed selective alkenylation of furan substrates having electron‐withdrawing substituents.

中文翻译：

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钯/羧酸催化糠醛及其衍生物的炔烃烷基化

糠醛及其衍生物在钯/羧酸催化剂的存在下通过α-CH活化与炔烃进行烯基化反应，得到相应的单和双烯基化产物。在该反应过程中，反应性醛基保持完整。该催化体系可对具有吸电子取代基的呋喃底物进行选择性烯基化。