Palladium-Catalyzed Coupling Reaction of α-Diazocarbonyl Compounds with Aromatic Boronic Acids or Halides
作者:Jianbo Wang、Cheng Peng、Guobin Yan、Yan Wang、Yubo Jiang、Yan Zhang
DOI:10.1055/s-0030-1258322
日期:2010.12
Efficient palladium-catalyzed cross-coupling reactions of α-diazocarbonyl compounds and arylboronic acids or aryl halides have been developed. The reaction proceeds smoothly for a range of diazo compounds, boronic acids, and halides. The coupling reaction conditions tolerate various substituents on the aromatic rings of the substrates, such as chloro, fluoro, acyl, oxo, ester, and nitro groups. This
已经开发出有效的钯催化的α-重氮羰基化合物与芳基硼酸或芳基卤化物的交叉偶联反应。对于多种重氮化合物,硼酸和卤化物,反应可以顺利进行。偶联反应条件容许底物的芳环上的各种取代基,例如氯,氟,酰基,氧代,酯和硝基。该偶联反应构成了对α-芳基取代的α,β-不饱和羰基化合物的新颖获得。从机理上讲,钯-卡宾被认为是关键的中间体。其形成之后,将芳基迁移插入钯-卡宾配合物的碳中,随后消除β-氢化物。 钯催化-交叉偶联-重氮化合物-芳基卤化物-芳基硼酸