ChemInform Abstract: Palladium—Copper Catalyzed C(sp3)—C(sp2) Bond C—H Activation Cross‐Coupling Reaction: Selective Arylation to Synthesize 9‐Aryl‐9H‐xanthene and 9, 9‐Diaryl‐xanthene Derivatives. Issue 52 (6th December 2016)