Regioselective Copper-Catalyzed Dicarbonylation of Imidazo[1,2-a]pyridines with N,N-Disubstituted Acetamide or Acetone: An Approach to 1,2-Diketones using Molecular Oxygen.
JOURNAL OF ORGANIC CHEMISTRY(2015)
Abstract
A novel copper-catalyzed regioselective double carbonylation of imidazo[1,2-a]pyridines with N,N-disubstituted acetamide or acetone using molecular oxygen has been described. It has provided a new approach to synthesize 1,2-carbonyl imidazo[1,2-a]pyridines, which are important substrates and intermediates in preparation of fine chemicals. The product shares a skeleton similar to that of Zolpidem, one of the most prescribed drugs in the world. O-18-labeling experiments unambiguously established that the oxygen source of products originated from O-2 rather than H2O.
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Key words
acetone,copper-catalyzed,n-disubstituted
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