Qi Xue , Zheng-Li Fu , Wen-Yu Zhang , Xia-Lu Cheng , Yang Li , Hu Cai , Jin-Heng Li
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Palladium-catalyzed multicomponent [4 + 2] cycloaddition of 1,4-enynes with CO and arylamines to access polycyclic γ-lactams via dearomative rearrangement†
Herein we report a palladium-catalyzed intermolecular dearomative [4 + 2] cycloaddition of 1,4-enynes with CO and arylamines. Compared with the well-known Himbert intramolecular arene/allene cycloaddition, this method provides a facile platform for the synthesis of polycyclic γ-lactams, through the formation of four new chemical bonds (three C–C bonds and one C–N bond) in a single step, with excellent functional-group tolerance and high atom-economy.
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