... As for the Diels-Alder reactions of 2-[(trimethylsilyl)methyl]-1,3-buta- dine, see: Hosomi, A.; Saito, M.; Sasaki, J.; Iguchi, H.; Sakurai, H. Ab- stracts of the 27th Symposium on Organometallic Chemistry Japan, Osaka, Oct 14-15, 1980; p ... 11) Danishefsky, S.; Kitahara, T. J. Am ... Chem. ...