Nickel-Catalyzed Direct Alkylation of Heterocycles with α-Bromo Carbonyl Compounds: C3-Selective Functionalization of 2-Pyridones
作者:Akihiro Nakatani、Koji Hirano、Tetsuya Satoh、Masahiro Miura
DOI:10.1002/chem.201301350
日期:2013.6.10
Nickel HAS it: A Ni(cod)2/dppp catalyst system promotes the direct alkylation of electron‐rich heterocycles with α‐bromo carbonyl compounds and involves an alkyl radical intermediate (see scheme; cod=1,5‐cyclooctadiene, dppp=1,3‐bis(diphenylphosphino)propane). This homolytic radical aromatic substitution (HAS)‐type reaction enables the C3‐selective direct functionalization of 2‐pyridones.
镍:Ni(cod)2 / dppp催化剂体系促进富电子杂环与α-溴羰基化合物的直接烷基化,并涉及烷基自由基中间体(请参见方案; cod = 1,5-环辛二烯,dppp = 1 ,3-双(二苯基膦基)丙烷)。这种均质的自由基芳香取代(HAS)型反应可实现2-吡啶酮的C3选择性直接官能化。