Oshitari, Tetsuta; Shibasaki, Masakatsu; Yoshizawa, Takeshi; Tomita, Masahiro; Takao, Ken-Ichi; Kobayashi, Susumu Tetrahedron, 1997, vol. 53, # 32 p. 10993 - 11006 doi: 10.1016/S0040-4020(97)00360-8