Ruthenium-Catalyzed C-H Arylation and Alkenylation of Furfural Imines with Boronates
作者:Filipa Siopa、Valérie-Anne Ramis Cladera、Carlos Alberto Mateus Afonso、Julie Oble、Giovanni Poli
DOI:10.1002/ejoc.201800767
日期:2018.12.2
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
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。