3-Allyl-1-{[3-(4-nitro­phen­yl)-4,5-dihydro-1,3-oxazol-5-yl]meth­yl}-1H-anthra[1,2-d]imidazole-2,6,11(3H)-trione

The mol­ecular structure of the title compound, C28H20N4O6, consists of three fused six-membered rings (A,B,C) and one five-membered ring (D). The latter is linked to an isoxazole ring (E) via a methyl­ene unit. A 4-nitro-phenyl substituent (F) is attached to the isoxazole. The fused five and six-membered rings (C,D) are almost coplanar with an r.m.s. deviation of 0.0345 Å and make a dihedral angle of 9.40 (8)° with ring A. The isoxazole and 4-nitro-phenyl rings (E,F) are also almost coplanar with the imidazole and the fused adjacent ring (C,D), forming a dihedral angle of 11.4 (6)°. The crystal packing displays inter­molecular C—H⋯O hydrogen bonding. An intra­molecular C—H⋯O inter­action also occurs

Diethyl 2,6,11-trioxo-2,3-dihydro-1H-anthra[1,2-d]imidazole-1,3-diacetate

The title compound, C23H20N2O7, consists of three fused six-membered rings (A, B and C) and one five-membered ring (D), linked to two ethyl acetate groups. The four fused rings are slightly folded around the O=C⋯C=O direction of the anthraquinone system, with a dihedral angle of 3.07 (8)° between the fused five- and six-membered rings (C and D) and the terminal ring (A). The planes through the atoms forming each acetate group are nearly perpendicular to the mean plane of the anthra[1,2-d]imidazole system, as indicated by the dihedral angles between them of 79.94 (9) and 85.90 (9)°. The crystal packing displays non-classical C—H⋯O hydrogen bonds

1,3-Bis(naphthalen-2-ylmeth­yl)-1H-anthra[1,2-d]imidazole-2,6,11(3H)-trione

The title compound, C37H24N2O3, is a 1H-anthra[2,1-d]imidazole-2,6,11(3H)-trione derivative having naphthyl­methyl substitutents attached to the imidazole N atoms. The anthraquinone part of the mol­ecule is somewhat folded along the the line connecting the carbonyl bonds. The dihedral angle between the two benzene rings is 7.8 (1)°. The two naphthyl systems of the substituents of the imidazole ring are positioned on the same side of the five-membered ring; these are approximately coplanar, the dihedral angle between the napthyl systems being 4.3 (2)°

1,3-Bis[3-(1,3-dioxoisoindolin-2-yl)prop­yl]-1H-anthra[1,2-d]imidazole-2,6,11(3H)-trione

The title compound, C37H26N4O7, is a 1H-anthra[2,1-d]imidazole-2,6,11(3H)-trione derivative having isoindolindionylpropyl substitutents attached to the imidazole N atoms. The anthraquinone fragment is buckled, the dihedral angle between the two benzene rings being 1.6 (1)°. The two isoindoline rings of the substituents of the imidazole ring are positioned on opposite sides of the five-membered ring; these are nearly mutually perpendicular [dihedral angle between isoindoline rings = 88.3 (1)°]

8-Bromo-3,4-dihydro-2H-1,3-thia­zino[2,3:2′,1′]imidazo[5′,4′-b]pyridine

The imidazopyridine ring system in the title compound, C9H8BrN3S, is almost planar [r.m.s. deviation of the C and N atoms = 0.007 (1) Å]. The S and methyl­ene C atoms connected to the five-membered ring lie within this plane. The remaining two methyl­ene groups of the thia­zine ring are disordered over two sets of sites in a 0.817 (5):0.183 (5) ratio

trans-Diaqua­bis­[2,5-bis­(pyridin-2-yl)-1,3,4-thia­diazole]cobalt(II) bis­(tetra­fluoridoborate)

The bidentate 1,3,4-thia­diazole ligand substituted by two 2-pyridyl rings (denoted L) has been found to produce the new monomeric title complex, [Co(C12H8N4S)2(H2O)2](BF4)2. The thia­diazole and pyridyl rings surrounding the Co atom are almost coplanar [dihedral angle = 4.35 (7)°]. The mean plane defined by these heterocyclic moieties makes a dihedral angle of 18.72 (6)° with the non-coordinated pyridyl ring. The Co2+ cation, located at a crystallographic center of symmetry, is bonded to two ligands and two water mol­ecules in a trans configuration in an octa­hedral environment. The tetra­fluorido­­borate ions can be regarded as free anions in the crystal lattice. Nevertheless, they are involved in an infinite two-dimensional network along the [010] and [101] directions of O—H⋯F hydrogen bonds

6-Bromo-3-methyl-1H-imidazo[4,5-b]pyridin-2(3H)-one

The title compound, C7H6BrN3O, was obtained from the reaction of 6-bromo-1H-imidazo[4,5-b]pyridin-2(3H)-one with methyl iodide. All non-H atoms lie in a common plane [r.m.s deviation = 0.017 (1) Å]. The amino group is a hydrogen-bond donor to the carbonyl group of an inversion-related mol­ecule, the pair of hydrogen bonds giving rise to a hydrogen-bonded dimer

1,3-Dibenzyl-1H-anthra[1,2-d]imidazole-2,6,11(3H)-trione

The mol­ecule of the title compound, C29H20N2O3, contains four fused rings, three are six-membered rings and one is the five-membered imidazole ring. The fused-ring system is linked to two benzyl groups. The four fused rings are folded around the O=C⋯C=O direction of the anthraquinone, with a dihedral angle of 16.36 (8)° between the two terminal rings (A and D). The imidazole ring (D) is almost perpendicular to the two benzyl groups (E and F) with dihedral angles of 86.69 (17) and 83.15 (13)°, respectively. In the crystal, adjacent mol­ecules are linked by inter­molecular C—H⋯O hydrogen bonding

Synthesis and crystal structures of palladium complexes based on α\alpha -amino-oximes derived from (RR)-limonene and their application in allylic alkylation of 1,3-dioxo compounds

Coordination compounds Pd(L1)Cl$_{2}$, Pd(L2)Cl$_{2}$, and Pd(L3)Cl$_{2}$ have been synthesized from optically pure $\alpha$-amino-oxime ligands L1–L3 based on $(R)$-limonene. Structures of the new palladium complexes are characterized and described by NMR spectroscopy and X-rays. These $\alpha$-amino-oxime ligands were then evaluated in the palladium-catalysed allylation of 1,3-dioxo compounds

Synthesis and crystal structures of palladium complexes based on α\alpha -amino-oximes derived from (RR)-limonene and their application in allylic alkylation of 1,3-dioxo compounds

Coordination compounds Pd(L1)Cl$_{2}$, Pd(L2)Cl$_{2}$, and Pd(L3)Cl$_{2}$ have been synthesized from optically pure $\alpha$-amino-oxime ligands L1–L3 based on $(R)$-limonene. Structures of the new palladium complexes are characterized and described by NMR spectroscopy and X-rays. These $\alpha$-amino-oxime ligands were then evaluated in the palladium-catalysed allylation of 1,3-dioxo compounds