Chemoselective Cross-Coupling between Two Different and Unactivated C(aryl)-O Bonds Enabled by Chromium Catalysis.

We report here the first example of cross-coupling between two different and unactivated C(aryl)–O bonds with chromium catalysis. The combination of low-cost Cr(II) salt, 4,4-di-tert-butyl-2,2-dipy...