الفهرس 
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Abstract
Alkyl groups attached to aromatic heterocycles behaves very different than alkyl aromatic hydrocarbons. Thus whereas the latter functions are normally inert toward electrophilic reaggents , alkyl aromatic heterocycles, are known to react with a variety of electrophiles under relatively mild conditions.This extra reactivity is attributed to the stabilizing effect of heteroat-olU exerts on the carbanions of alkybeteroarmatic.Howwever, even when alkyl group is linked to a pi-deficient heterrocycle in a posit ion that do not permit this delocalization to occure , extra t:;tability of tbese carbanions is observed. The pi-dificiency of the ring is sufficient to promote and stabilli ze carbanions. In addi t ion to this several subst i tuted al kyllheteroawatics have been reported to react readily with nucleoophilic reagents or at least to exhibit peculiar reactivity tooward these latter reagents.
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