Copper reagents

A new iodine/copper exchange was also developed. This method tolerates even keto-functions and allows the synthesis of polyfunctionalized heterocycles.

• Yang, Xiaoyin; Knochel, Paul.    Selective Functionalization in Positions 2 and 3 of Indole via an Iodine−Copper Exchange Reaction.    Org. Lett. 2004, 6, 1665.