An efficient copper-catalyzed formation of highly substituted pyrazoles using molecular oxygen as the oxidant
作者:Mamta Suri、Thierry Jousseaume、Julia J. Neumann、Frank Glorius
DOI:10.1039/c2gc35476d
日期:——
An efficient Cu-catalyzed formation of tetra-substituted pyrazoles is reported. In this atom economic process, readily available enamines and nitriles are reacted by C–C and N–N bond formation. Oxygen has been successfully used as the oxidant, which has important economic and environmental advantages. A broad scope of enamines and nitriles can be utilized in this process.
Efficient Synthesis of Pyrazoles: Oxidative CC/NN Bond-Formation Cascade
作者:Julia J. Neumann、Mamta Suri、Frank Glorius
DOI:10.1002/anie.201002389
日期:2010.10.11
Golden section: A novel synthetic strategy for the synthesis of tetrasubstituted pyrazoles is provided. In an efficient CC/NNbond‐formation cascade, enamines and nitriles are oxidatively coupled to deliver pyrazoles in good yields (see scheme). The ready availability of the starting materials, the high level of practicability of the reaction and work up, and the avoidance of hydrazine starting materials
黄金部分:提供了一种合成四取代吡唑的新颖合成策略。在有效的C CC / NN键形成级联反应中,烯胺和腈氧化偶联以高产率提供吡唑(请参阅方案)。起始原料的容易获得,反应和后处理的高度实用性以及避免使用肼起始原料,使得该方法具有吸引力。
Palladium-Catalyzed Oxidative Cyclization of<i>N</i>-Aryl Enamines: From Anilines to Indoles
作者:Sebastian Würtz、Souvik Rakshit、Julia J. Neumann、Thomas Dröge、Frank Glorius