Modification of Pseudo-C3-Symmetric Trisoxazoline and Its Application to the Friedel-Crafts Alkylation of Indoles and Pyrrole with Alkylidene Malonates - Zhou, You-Yun; Sun, Xiu-Li; Zhu, Ben-Hu; Zheng, Jun-Cheng; Zhou, Jiao-Long; Tang, Yong (Synlett, 2011)