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.
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页码:2193 / 2196
页数:4
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[1]
[Anonymous], 2011, [No title captured], Patent No. [PCT/EP2011/054484, 2011054484]