1. For the chemistry of 1-trimthylsilyl-2,3-butadienes, see: Hatakeyama, S.; Kawamura, M.; Takano, S. J. Am. Chem. Soc. 1994, 116, 4081–4082 and earlier papers.
2. Hatakeyama, S.; Sugawara, K.; Takano, S. J. Chem. Soc. Chem. Commun. 1993, 125–127.
3. For example, when 1-trimethylsilyl-2-phenyl-2,3-butadiene 1 (R = Ph) was allowed to react with iodine in CDCl3 at −20 °C in a NMR tube, the 1H NMR spectrum of the reaction mixture showed the existence of the corresponding vic-diiodoallylsilane 2 and 2-iodobuta-1,3-diene 3 in a ratio of 11:1.
4. Ratovelomanana, V.; Hammoud, A.; Linstrumelle, G. Tetrahedron Lett. 1987, 28, 1649–1650. Mitani, M.; Kobayashi, Y.; Koyama, K. J. Chem. Soc. Perkin Trans. 1. 1995, 653–655. Zheng, B.; Srebnik, M. Synth. Commun. 1996, 26, 393–405. Okamoto, S.; Sato, H.; Sato, F. Tetrahedron Lett. 1996, 37, 8865–8868.
5. All new compounds reported herein exhibited satisfactory spectral data (1H and 13C NMR, IR, MS).