Journal
RSC ADVANCES
Volume 3, Issue 43, Pages 20281-20286Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra43515f
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A novel and efficient protocol has been developed for the synthesis of azaarene-substituted 3-hydroxy-2-oxindoles via sp(3) C-H functionalization of 2-methyl azaarenes and (2-azaaryl)methanes with isatin in good to excellent yield. This is the first example in which heterogeneous, reusable silica supported dodecatungstophosphoric acid (DTP/SiO2) catalyzed sp(3) C-H functionalization of 2-substituted azaarenes and (2-azaaryl)methanes.
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