Dihydropentalene und 6-Vinylfulvene aus cyclopentadienylcyclopropenen. Notiz zur Umsetzung von 1,2,3-Tris[(tert-butyl)thio]cyclopropenylium-tetrafluoroborat mit cyclopentadienid

Dihydropentalenes and 6-Vinylfulvenes from Cyclopentadienyl-cyctopropenes. Reaction of 1,2,3-Tris(tert-butyl)thio]cyclopropenylium Tetrafluoroborate with Cyclopentadienide . Reaction of 1,2,3-tris(tert-butyl)thio]cyclopropenylium tetrafluoroborate ( 6a ) with sodium Cyclopentadienide gives, besides of 7,8-bis{(tert-buty)thio calicene ( 7a ), rearranged products 7,8,8-tris(tert-butyl)thio]-6-vinylpentafulvene ( 9a ) and 4,5.6-tris(tert-butyl}thio]-1,2-dihydropentalene ( 10a )) in varying amounts depending on reaction conditions. Vinyl-carbenes 12 and 13 are supposed to be possible intermediates.