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Palladium-catalyzed carbonylative [3+2+1] annulation of N-aryl-pyridine-2-amines with internal alkynes by C-H activation: facile synthesis of 2-quinolinones. 2014
Jianbin Chen, and
Kishore Natte, and
Anke Spannenberg, and
Helfried Neumann, and
Matthias Beller, and
Xiao-Feng Wu
Leibniz-Institut für Katalyse an der Universität Rostock e.V, Albert-Einstein-Str. 29a, 18059 Rostock (Germany).
We describe here a novel procedure for the synthesis of highly substituted 2-quinolinones. By this newly developed approach, 2-quinolinone derivatives were prepared in moderate to good yields by carbonylative cyclization of N-aryl-pyridine-2-amines and internal alkynes by CH activation. Remarkably, [Mo(CO)6 ] was applied as a solid CO source and the reaction proceeded in an atom economic manner.
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