ChemInform Abstract: Synthesis of Benzopyran[4,3-b](N-arylsulfonyl)indoles and Benzopyrano[3,4-b](N-arylsulfonyl)indoles via Intramolecular Palladium-Catalyzed Aryl-Aryl Coupling Reaction - Fan, Ling-ling; Che, Zhi-ping; Zhang, Rui; Yu, Xiang; Zhi, Xiao-yan; Xu, H. (ChemInform, 2012)