Bertram, Anna; Blake, Alexander J.; Gonzalez-Lopez De Turiso, Felix; Hannam, Jeffery S.; Jolliffe, Katrina A.; Pattenden, Gerald; Skae, Michael Tetrahedron, 2003, vol. 59, # 35 p. 6979 - 6990 doi: 10.1016/S0040-4020(03)00821-4