Catalytic C–H Activation of Arylacetylenes: A Fast Assembly of 3-(Arylethynyl)-3-hydroxyindolin-2-ones Using CuI/DBU
摘要:
A highly efficient and atom-economic methodology has been developed for the synthesis of 3-(arylethynyl)-3-hydroxyindolin-2-ones from isatins by C-H activation of arylacetylenes using a catalytic quantity of copper(I) iodide (5 mol%) and DBU (20 mol%) at 25 degrees C, affording the products in excellent yields in very short reaction time (5 min).