Crystal structure of 1-{(E)-[(3,4-di-chloro-phen-yl)imino]-meth-yl}naphthalen-2-ol.

In the title compound, C17H11Cl2NO, the dihedral angle between the planes of the naphthalene ring system and the benzene ring is 28.88 (11)°. The main twist in the mol-ecule occurs about the N-Cb (b = benzene ring) bond, as indicated by the C=N-Cb-Cb torsion angle of 31.

Synthesis, biological evaluation and molecular docking of N-phenyl thiosemicarbazones as urease inhibitors.

Urease is an important enzyme which breaks urea into ammonia and carbon dioxide during metabolic processes. However, an elevated activity of urease causes various complications of clinical importance. The inhibition of urease activity with small molecules as inhibitors is an effective strategy for therapeutic intervention.

1-{[(E)-(4-{[(2Z)-2,3-Di-hydro-1,3-thia-zol-2-yl-idene]sulfamo-yl}phen-yl)iminium-yl]meth-yl}naphthalen-2-olate.

In the title zwitterionic compound, C20H15N3O3S2, the 2-hy-droxy-naphthalene-1-carbaldehyde group A, the anilinic unit B and the 1,3-thia-zol-2(3H)-imine group C are each approximately planar with r.m.s.

Crystal structure of 4-chloro-2-{(E)-[(3,4-di-methyl-phen-yl)imino]-meth-yl}phenol.

In the title compound, C15H14ClNO, which is isostructural with its bromo analogue [Tahir et al. (2012 ▶). Acta Cryst.

Crystal structure of 3-{(E)-[(3,4-di-chloro-phen-yl)imino]-meth-yl}benzene-1,2-diol.

In the title Schiff base, C13H9Cl2NO2, which arose from the condensation of 3,4-di-chloro-aniline with 2,3-di-hydroxy-benzaldehyde, the dihedral angle between the aromatic rings is 44.74 (13)°. Intra-molecular O-H⋯O and O-H⋯N hydrogen bonds close S(5) and S(6) rings, respectively.

Crystal structure of 4-(3-carb-oxy-pro-pan-amido)-2-hy-droxy-benzoic acid mono-hydrate.

In the title hydrate, C11H11NO6·H2O, the organic mol-ecule is approximately planar (r.m.s.

Crystal structure of (E)-2-[(4-hy-droxy-benzyl-idene)aza-nium-yl]benzoate.

The title Schiff base, C14H11NO3, crystallizes as a zwitterion (i.e. proton transfer from the carb-oxy-lic acid group to the imine N atom).

N'-[(E)-4-Bromo-benzyl-idene]pyrazine-2-carbohydrazide.

In the title compound, C12H9BrN4O, the N'-methyl-idene-pyrazine-2-carbohydrazide and 4-bromobenzene groups are oriented at a dihedral angle of 10.57 (7)°. The hydrazide N-H group is involved in intra-molecular N-H⋯N inter-action, which generates an S(5) motif.

2-[(E)-({4-[(4,6-Dimethyl-pyrimidin-2-yl)sulfamo-yl]phen-yl}iminio)meth-yl]-6-hy-droxy-phenolate.

The title compound, C(19)H(18)N(4)O(4)S, exists as a zwitterion in the solid state, with nominal proton transfer from a phenol group to the imine N atom. The 2,3-dihy-droxy-benzaldehyde fragment is oriented at a dihedral angle of 35.51 (11)° to the adajacent aniline group and makes a dihedral angle of 76.

(2E)-2-(4-Hy-droxy-3-meth-oxy-benzyl-idene)hydrazinecarboxamide.

In the title compound, C(9)H(11)N(3)O(3), two mol-ecules are present in the asymmetric unit in which the 4-hy-droxy-3-meth-oxy-benzaldehyde and hydrazinecarboxamide units are almost planar [with r.m.s.

3-[(E)-(Pyridin-3-yl-imino)-meth-yl]phenol.

Two independent mol-ecules are present in the asymmetric unit of the title compound, C(12)H(10)N(2)O, in which the 3-hy-droxy-benzaldehyde and the pyridin-3-amine units are almost planar [r.m.s.

2-[(E)-3,4-Dimeth-oxy-benzyl-idene]hydrazinecarboxamide.

In the title compound, C(10)H(13)N(3)O(3), the 3,4-dimeth-oxy-benzyl-idene and hydrazinecarboxamide groups are oriented at a dihedral angle of 53.82 (6)° and an intra-molecular N-H⋯N hydrogen bond generates an S(5) ring motif. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds into sheets propagating in (-201), which feature R(1) (2)(5), R(2) (2)(8) and R(2) (4)(14) loops.

2-{(E)-[(4-Methyl-phen-yl)imino]-meth-yl}-4-nitro-phenol-2-{(E)-[(4-methyl-phen-yl)iminio]meth-yl}-4-nitro-phenolate (0.60/0.40).

The crystal of the title compound, 0.6C(14)H(12)N(2)O(3)·0.4C(14)H(12)N(2)O(3), contains a mixture of its neutral (OH containing) and zwitterionic (NH containing) forms, in a 0.

N-{4-[(E)-(4-Methyl-phen-yl)imino-meth-yl]phen-yl}acetamide.

There are two symmetry-independent mol-ecules in the asymmetric unit of the title compound, C(16)H(16)N(2)O, that differ in conformation. The dihedral angles between the benzene rings in the two mol-ecules are 44.35 (19) and 48.

2-Hy-droxy-5-[(E)-(1H-indol-3-yl-methyl-idene)aza-nium-yl]benzoate.

The zwitterionic title compound, C(16)H(12)N(2)O(3), was obtained as a result of the condensation of 5-amino-salicylic acid and 1H-indole-3-carbaldehyde. The whole mol-ecule is roughly planar: the 4-hy-droxy-anilinic group and the 1H-indole-3-carbaldehyde moieties are only slightly twisted, making a dihedral angle of 7.77 (11)°, whereas, the carboxyl-ate group makes a dihedral angle of 3.

N-[(E)-1,3-Benzodioxol-5-yl-methyl-idene]-4-methyl-aniline.

The two symmetry-independent mol-ecules in the asymmetric unit of the title compound, C(15)H(13)NO(2), differ in conformation, with the virtually planar 4-methyl-aniline (r.m.s.

5-[(E)-(2,6-Dichloro-benzyl-idene)amino]-2-hy-droxy-benzoic acid.

There are two geometrically different mol-ecules in the asymmetric unit of the title compound, C(14)H(9)Cl(2)NO(3). The 5-amino-2-hy-droxy-benzoic acid units [r.m.

(E)-1-(2-Nitro-benzyl-idene)-2-phenyl-hydrazine.

The asymmetric unit of the title compound, C(13)H(11)N(3)O(2), contains two mol-ecules with slightly different conformations: the dihedral angle between the aromatic rings is 13.01 (10)° in one mol-ecule and 14.05 (10)° in the other.

2-{[(E)-1,3-Benzodioxol-5-yl]methyl-idene-amino}-benzoic acid.

In the title compound, C(15)H(11)NO(4), the dihedral angle between the aromatic rings is 23.8 (2)° and an intra-molecular O-H⋯N hydrogen bond generates an S(6) ring. In the crystal, C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.

N-[(E)-2,4-Dichloro-benzyl-idene]-4-methyl-aniline.

In the title compound, C(14)H(11)Cl(2)N, the dihedral angle between the 4-methyl-anilinic and 2,4-dichloro-benzaldehyde moieties is 7.37 (8)°. In the crystal, C-H⋯π inter-actions between the terminal methyl group and a symmetry-related ring of the anilinic group help to establish the packing.