Enders, Dieter; Lenzen, Achim; Backes, Michael; Janeck, Carsten; Catlin, Kelly; Lannou, Marie-Isabelle; Runsink, Jan; Raabe, Gerhard Journal of Organic Chemistry, 2005, vol. 70, # 25 p. 10538 - 10551 doi: 10.1021/jo0518093