2-Amino-4-benzoyl-1-arylpyrrole-3-carbonitriles react with arylidene malonodinitriles, β-ketoesters and βdiketones to afford pyrrolo[2,3-b]pyridine derivatives.

The title compound, C(9)H(9)N(5), is slightly twisted from planarity, with a maximum deviation of 0.0285 (13) Å from the pyridine plane for the C atom bearing the amino group. The cyano groups are on different sides of the pyridine plane, with C- and N-atom deviations of 0.072 (3)/0.124 (4) and -0.228 (4)/-0.409 (5) Å from the pyridine plane. In the crystal, N-H⋯N and C-H⋯N hydrogen bonds conne...

The reaction of 3-amino-5-bromo-pyridine with N-iodo-succinimide in the presence of acetic acid produces the title compound, C(5)H(4)BrIN, with an iodo substituent in position 2 of the pyridine ring. The crystal structure features rather weak inter-molecular N-H⋯N hydrogen bonds linking the mol-ecules into chains along the z axis of the crystal.

The title 1:1 co-crystal, C(7)H(7)NO(2)·C(10)H(8)N(2)S(2), features a highly twisted 4-(pyridin-4-yldisulfan-yl)pyridine mol-ecule [dihedral angle between the pyridine rings = 89.06 (10)°]. A small twist is evident in the 2-amino-benzoic acid mol-ecule, with the C-C-C-O torsion angle being -7.7 (3)°. An N-H⋯O hydrogen bond occurs in the 2-amino-benzoic acid mol-ecule. In the crystal, mol-ecules...

In the title compound, [HgCl(2)(C(6)H(8)N(2))(2)], the two independent Hg(II) cations are each located on a twofold rotation axis and coordinated by two pyridine N atoms from two 2-amino-3-methyl-pyridine ligands and two Cl(-) anions in a distorted tetra-hedral geometry. An intra-molecular N-H⋯Cl hydrogen bond occurs in each independent complex mol-ecule. Inter-molecular N-H⋯Cl hydrogen bonds o...

In the title compound, [Co(C(7)H(5)O(2))(2)(C(5)H(6)N(2))(2)], the Co(II) atom is hexa-coordinated by four O atoms from two benzoate anions, and two N atoms from two 2-amino-pyridine mol-ecules, resulting in a distorted octa-hedral geometry. Both benzoate anions act as bidentate ligands and both 2-amino-pyridine mol-ecules are coordinated to the metal through their pyridyl N atoms. The crystal ...

In the title compound, [CoCl(2)(C(6)H(8)N(2))(2)], the Co(II) ion is four-coordinated by two pyridine N atoms from the 2-amino-3-methyl-pyridine ligands and two chloride ions in a distorted tetra-hedral geometry. A weak intra-molecular N-H⋯Cl inter-action occurs. The crystal packing is stabilized by inter-molecular N-H⋯Cl and C-H⋯Cl hydrogen-bond inter-actions.