Ru<sub>3</sub>(CO)<sub>12</sub>-Catalyzed C−H/CO/Olefin Coupling of <i>N</i>-Pyridylindolines. Direct Carbonylation at a C−H Bond δ to the Pyridine Nitrogen
The reaction of N-pyridylindolines with CO and ethylene in the presence of Ru3(CO)12 results in direct carbonylation at a C-Hbond delta to the pyridine sp2 nitrogen, which represents a new type of C-H/CO/olefin coupling. The presence of a pyridine ring as a directing group on the substrates is essential for the reaction to proceed. The choice of N,N-dimethylacetamide (DMA) as the solvent is crucial
在Ru3(CO)12的存在下,N-吡啶基吡啶啉与CO和乙烯的反应导致在CH键δ上直接羰基化到吡啶sp2氮上,这代表了新型的CH / CO /烯烃偶联。吡啶环作为底物上的导向基团的存在对于反应进行至关重要。选择N,N-二甲基乙酰胺(DMA)作为溶剂对于反应有效进行至关重要。