Kodama, Mitsuaki; Shiobara, Yoshinori; Sumitomo, Hisako; Fukuzumi, Kazuyoshi; Minami, Hiroyuki; Miyamoto, Yasuko Tetrahedron Letters, 1986, vol. 27, # 19 p. 2157 - 2160 doi: 10.1016/S0040-4039(00)84474-3