Indole
= Indole
A fused benzene–pyrrole heteroaromatic ring system. Electrophilic substitution normally favours C3; when that position is occupied, C2 substitution can retain the pyrrolic <nitrogen>–hydrogen bond.
= Indole
A fused benzene–pyrrole heteroaromatic ring system. Electrophilic substitution normally favours C3; when that position is occupied, C2 substitution can retain the pyrrolic <nitrogen>–hydrogen bond.