P. Aubert et J. Pornet, BIS-PROPARGYLIC BIS-SILANES AS PRECURSORS OF BIS(VINYLIDENE)OXANES AND BIS(VINYLIDENE)OXEPANES, Journal of organometallic chemistry, 538(1-2), 1997, pp. 211-221
The preparation of bis-silanes Me3SiCH2-C=C-(CH2)(n)-C=C-CH2SiMe3 (n =
1, 2) is described. These silanes allow one to prepare bis(vinylidene
)oxanes when n = 1 and bis(vinylidene)oxepanes when n = 2.