Total synthesis of urdamycinone B via C-glycosidation of an unprotected sugar and Diels-Alder reaction of C-glycosyl juglone ... Goh Matsuo, Yuko Miki, Masaya Nakata, Shuichi Matsumura and Kazunobu Toshima* Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan ... The total synthesis of C-glycosyl angucycline, urdamycinone B 1, was achieved via ...