Direct and Facile Bromination at the 5- and 5′-Positions of (R)-6,6′-Dialkyl- and (R)-6,6′-Diaryl-2,2′-Binaphthols - Zhang, Shuwei; Liu, Yan; Huang, Hui; Zheng, Lifei; Wu, Linglin; Cheng, Yixiang (Synlett, 2008)