Bicyclo[3.10]Hex. I(6)-enes: Reactivity of the 3-oxa derivative
作者:Brian Halton、Janet H Bridle、Eva G. Lovett
DOI:10.1016/s0040-4039(00)88794-8
日期:1990.1
Treatment of the dihalo-3-oxabicyclohexane 1 with excess t-butoxide leads to the ring strained cyclopropene 3. This is captured by diphenylisobenzofuran as Diels-Alder adduct 7, whereas with furan only the ring expanded vinylcarbene 9 is intercepted and spirocycle 11 results.
Treatment of gem-dichlorocyclopropanecarboxylic acids with SF4 yields many rearranged products, i.e. 1,1-difluoro-substituted olefins. The mechanism of the rearrangement is discussed.