Brønsted Acid‐Catalyzed Regioselective (4+2) Cyclization of 2,3‐Indolyldimethanols With 3‐Vinylindoles for Synthesis of Bisindole‐Fused Six‐Membered Rings. - Yu, Xian‐Yang; Zhang, Yong‐Bo; Yu, Hao‐Lei; Wang, Jing‐Kai; Shi, Ke‐Wen; Guo, Xin‐Yan; Ni, Shao‐Fei; Tan, Wei (Chemistry - A European Journal, 2026)