One-pot Synthesis of 3-Substituted-3-Hydroxyindolin-2-ones: Three Component Coupling of N-Protected isatin, Aryne Precursor and 1, 3-Cyclodione under Metal-free Conditions
An aryne-based synthetic protocol has been developed for the synthesis of 3-substituted-3-hydroxy-indolin-2-ones. A wide variety of 3-hydroxyindolin-2-ones were synthetized in good yields under metal-free conditions via three components coupling of...