Furfural activated again: a Ru‐catalyzed arylation and alkenylation of furfural imines with aryl‐ or alkenyl‐boronates, involving a directed C‐H activation occurring at C3 of the furan ring, was developed. It was revealed that an electron‐rich aromatic imine, such as a p‐dimethylaminophenyl‐imine, enables the coupling with good yields. After the coupling, a smooth hydrolytic removal of the imine directing‐group releases the C3‐functionalized furfurals.

中文翻译：

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钌催化的糠醛亚胺与硼酸酯的CH-H芳基化和烯基化

糠醛再次被活化：开发了Ru催化的糠醛亚胺与芳基或链烯基硼酸酯的芳基化和烯基化反应，涉及在呋喃环的C3处发生直接的CH活化。结果表明，富电子的芳族亚胺，例如对二甲氨基苯基亚胺，能够以良好的收率进行偶合。偶联后，平滑水解除去亚胺导向基团，释放出C3功能化的糠醛。