The results of research into the chemistry of 7-azaindole during the last t
wenty years are presented. New synthetic methods for the 7-azaindole struct
ures are developed including palladium-catalysed cross-coupling reactions.
Reactivity of 3-formyl-, 3-halogeno- and 2-lithio-7-azaindole derivatives i
s reported. Functionalisation of the pyridine ring via the N-oxide is also
described. In the last part, biological activity of various 7-azaindole der
ivatives is briefly indicated.