| abstract |
Process for ring opening compounds of the formulan in which R¹ is heteroaryl or aryl, R² is a leaving group, R³, R⁴, R⁵ and R⁶ are independently selected from hydrogen, alkyl, aralkyl, aryl, heteroaryl and alkenyl, provided that at least one of the groups R³ to R⁶ is other than hydrogen, by breaking the bond joining the carbon atom attached to R³ and the carbon atom attached to R⁶ in organic solution using silica,giving useful diene or allyl derivatives, certain of which are novel. |