Butadienyltriphenylphosphonium bromid

CYCLOHEXADIENES frans-l-Butadienyltriphenylphosphonium bromide. CYCLOHEXA-2,5-DIENONES Antimony(V) chloride. 

This method even worked well for 8-carbonylylides of the amide type (130 X = NR, Z = C here) in which case pyrrole derivatives were formed (Scheme 28, top). Enolates were also used as C-nucleophUes in similar reactions with butadienyltriphenylphosphonium bromide 132. An interesting application of this variant was part of the synthesis by White and Kawasaki [78] of the ichthyotoxin (+)-latrunculin A 137, originally isolated from the Red... 

The fused-ring cyclohexadienes (30) have been obtained" by the condensation of (31) with 1,3-butadienyltriphenylphosphonium bromide, prepared in situ from 2-butenylenetriphenylphosphonium bromide or 4-bromo-2-butenyltriphenylphosphon-ium bromide and potassium t-butoxide in ether. 

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