Kimura, Mutsumi; Hamakawa, Takashi; Muto, Tsuyoshi; Hanabusa, Kenji; Shirai, Hirofusa; Kobayashi, Nagao Tetrahedron Letters, 1998, vol. 39, # 46 p. 8471 - 8474 doi: 10.1016/S0040-4039(98)01864-4