Synthetic Study on 2,2′-(1,4-Phenylene)bis(3-alkyl-1H-inden-1-ones): The First Application of a Sodium Enolate as a ‘Protecting Group’ in the Grignard Reaction - Pang, Mei-Li; Wang, Ying; Feng, Xiang-Qing; Chen, Yong; Han, Jie; Meng, Ji-Ben (Synthesis, 2008)