Synthesis and Biological Activity of 1H-Pyrrolo[2,3-b]pyridine Derivatives: Correlation between Inhibitory Activity against the Fungus Causing Rice Blast and Ionization Potential
摘要:
Synthesis and biological activity of a variety of 3- and B-substituted 1H-pyrrolo[2,3-b]pyridine (7-azaindole) derivatives are described. Many of the synthesized 7-azaindoles exhibited considerable fungicidal activity toward Pyricularia oryzae, a fungus which causes rice blast, in vivo. When quantum parameters of the tested 7-azaindoles were evaluated by semiempirical molecular orbital calculations, a relationship was observed between the activity and the calculated ionization potentials of the 7-azaindole derivatives.
Selective functionalization of 1H-pyrrolo[2,3-b]pyridine (7-azaindole) at the 6-position was achieved by Reissert-Henze type reaction. Thus, halogeno (Cl, Br, I), cyano and thiocyanato groups were directly introduced to the pyridine ring of 7-azaindole.
Synthesis and Biological Activity of 1<i>H</i>-Pyrrolo[2,3-<i>b</i>]pyridine Derivatives: Correlation between Inhibitory Activity against the Fungus Causing Rice Blast and Ionization Potential
Synthesis and biological activity of a variety of 3- and B-substituted 1H-pyrrolo[2,3-b]pyridine (7-azaindole) derivatives are described. Many of the synthesized 7-azaindoles exhibited considerable fungicidal activity toward Pyricularia oryzae, a fungus which causes rice blast, in vivo. When quantum parameters of the tested 7-azaindoles were evaluated by semiempirical molecular orbital calculations, a relationship was observed between the activity and the calculated ionization potentials of the 7-azaindole derivatives.