Groove binding mediated structural modulation and DNA cleavage by quinoline appended chalcone derivative

The present study embodies the detail DNA binding interaction of a potential bioactive quinoline appended chalcone derivative (E)-3-(anthracen-10-yl)-1-(6,8-dibromo-2-methylquinolin-3-yl)prop-2-en-1-one (ADMQ) with calf thymus DNA (ctDNA) and its consequences by UV-Vis absorption, steady state fluorescence spectroscopy, fluorescence anisotropy, circular dichromism, helix melting, agarose gel electrophoresis, molecular docking, Induced Fit Docking (IFD) and molecular dynamics (MD) simulation. The UV-Vis absorption and fluorescence study reveal that the molecule undergoes considerable interaction with the nucleic acid. The control KI quenching experiment shows the lesser accessibility of ADMQ molecule to the ionic quencher (I(-)) in presence of ctDNA as compared to the bulk aqueous phase. Insignificant change in helix melting temperature as well as in circular dichromism (CD) spectra points toward non-covalent groove binding interaction. The moderate rotational confinement of this chalcone derivative (anisotropy=0.106) trapped in the nucleic acid environment, the comparative displacement assay with well-known minor groove binder Hoechst 33258 and intercalator Ethidium Bromide establishes the minor groove binding interactions of the probe molecule. Molecular docking, IFD and MD simulation reveal that the DNA undergoes prominent morphological changes in terms of helix unwinding and bending to accommodate ADMQ in a crescent shape at an angle of 110° in a sequence specific manner. During interaction, ADMQ rigidifies and bends the sugar phosphate backbone of the nucleic acid and thereby shortens its overall length by 3.02Å. Agarose gel electrophoresis experiment with plasmid pBR 322 reveals that the groove binded ADMQ result in a concentration dependent cleavage of plasmid DNA into its supercoiled and nicked circular form. The consolidated spectroscopic research described herein provides quantitative insight into the interaction of a heterocyclic chalcone derivative with relevant target nucleic acid, which may be useful for the future research on chalcone based therapeutic agents.

Antihypertensive activity of a quinoline appended chalcone derivative and its site specific binding interaction with a relevant target carrier protein

The usefulness of heterocyclic chalcone derivative as a therapeutic target in controlling hypertension and its site specific binding interaction with model transport protein to get a clear picture about its delivery mechanism.

(2E)-3-(2-Chloro-7-methyl-quinolin-3-yl)-1-(6-chloro-2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one ethanol monosolvate

In the title ethanol solvate, C₂₉H₂₀Cl₂N₂O·C₂H₅OH, the quinolinyl residues form a dihedral angle of 46.41 (4)° with each other, and each is inclined [C_p—C—C=O and C=C—C—C_p (p = pyridyl) torsion angles = 54.8 (2) and 144.44 (19)°, respectively] with respect to the almost planar bridging prop-2-en-1-one residue [O=C—C=C torsion angle = −4.1 (3)°]. The ethanol solvent mol­ecule is disordered over two positions of equal occupancy and is located close to a centre of inversion. These mol­ecules reside in cavities defined by the organic mol­ecules, which are connected into a three-dimensional architecture by C—H⋯Cl, C—H⋯O and C—H⋯N inter­actions, as well as π–π contacts [inter-centroid distances = 3.5853 (10) and 3.8268 (11) Å], each involving pyridyl rings.

(2E)-3-(2-Chloro-benzo[h]quinolin-3-yl)-1-(2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one

In the title compound, C32H21ClN2O, an almost planar (r.m.s. deviation = 0.033 Å) prop-2-en-1-one bridge links quinolinyl and benzoquinolinyl residues; the latter are twisted out of the plane of the bridge [dihedral angles = 75.94 (5) and 20.20 (5)°, respectively]. In the crystal, a three-dimensional architecture arises as a result of C-H⋯O, C-H⋯π and π-π [centroid-centroid distances involving pyridine rings = 3.5806 (7)-3.7537 (7) Å] interactions.

[meso-5,10,15,20-Tetra-kis(3-methyl-thio-phen-2-yl)porphyrinato-κ(4) N,N',N'',N''']nickel(II) benzene hemisolvate

In the title compound, [Ni(C40H28N4S4)]·0.5C6H6, the Ni(II) atom is in a square-planar geometry defined by four pyrrole N atoms. There is considerable buckling in the porphyrin ring with the dihedral angles between the N4 donor set and the pyrrole rings being in the range 16.24 (5)-22.47 (5)°. Each of the six-membered chelate rings is twisted about an Ni-N bond and the dihedral angles between diagonally opposite chelate rings are 21.36 (4) and 23.87 (4)°; each pair of rings is oriented in opposite directions. The methyl-thienyl rings are twisted out of the plane of the central N4 core with dihedral angles in the range 75.98 (2)-88.70 (5)°. All four methyl-thienyl groups are disordered over two sets of sites, as is commonly found with such groups, with occupancies of 0.553 (8):0.447 (8), 0.579 (7):0.421 (7), 0.796 (6):0.204 (6) and 0.956 (7):0.044 (7). The benzene solvent mol-ecule was found to be present in half-occupancy.

(2E)-3-(2-Chloro-8-methyl-quinolin-3-yl)-1-(2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one

In the title compound, C₂₉H₂₁ClN₂O, there is a twist in the bridging prop-2-en-1-one group [C=C—C=O torsion angle = 22.7 (2)°]. The quinolinyl residues form a dihedral angle of 86.92 (4)°, indicating an almost perpendicular relationship. In the crystal, supra­molecular layers in the bc plane are stabilized by C—H⋯π and π–π inter­actions [centroid–centroid distance = 3.4947 (7) Å].

(2E)-3-(6-Chloro-2-meth-oxy-quinolin-3-yl)-1-(2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one acetone monosolvate

In the title solvate, C29H21ClN2O2·C3H6O, a prop-2-en-1-one bridge links two quinolinyl residues; the latter are almost perpendicular [dihedral angle = 78.27 (6)°]. The dihedral angle between the quinonyl ring system and its pendant phenyl group is 59.78 (8)°. A small twist in the bridging prop-2-en-1-one group is noted [O=C-C=C torsion angle = -10.6 (3)°]. In the crystal, a three-dimensional architecture arises as a result of C-H⋯O and π-π stacking [centroid-centroid distances = 3.5504 (12)-3.6623 (12) Å].

(2E)-3-(6-Chloro-2-meth-oxy-quinolin-3-yl)-1-(2,4-di-methyl-quinolin-3-yl)prop-2-en-1-one

The mol­ecule of the title compound, C₂₄H₁₉ClN₂O₂, is bent, with the dihedral angle between the terminal quinoline ring systems being 63.30 (5)°. The quinolinyl residues are connected by an almost planar prop-2-en-1-one bridge (r.m.s. deviation = 0.022 Å), with the dihedral angles between this plane and the appended quinolinyl residues being 75.86 (7) and 38.54 (7)°. The C atom of the meth­oxy group is close to coplanar with its attached ring [deviation = 0.116 (2) Å]. In the crystal, a three-dimensional architecture is constructed by meth­yl–carbonyl C—H⋯O inter­actions and π–π inter­actions between centrosymmetrically related quinolinyl residues [centroid-to-centroid separations 3.5341 (10) and 3.8719 (9) Å].

(2E)-3-(2-Chloro-8-methyl-quinolin-3-yl)-1-(2,4-di-methyl-quinolin-3-yl)prop-2-en-1-one

In the mol­ecule of the title compound, C₂₄H₁₉ClN₂O, the terminal quinolinyl residues are close to perpendicular to each other [dihedral angle 83.72 (4)°]. The quinolinyl residues are connected by and inclined to the prop-2-en-1-one bridge, with the C_ar—C_ar—C—C (ar = aromatic) torsion angles being 71.01 (17) and 20.6 (2)°. The crystal structure features phen­yl–carbonyl C—H⋯O inter­actions and π–π inter­actions between centrosymmetrically related quinolinyl residues [3.5341 (10) and 3.8719 (9) Å], which together lead to a three-dimensional architecture.

3-Acetyl-2,4-dimethylquinolin-1-ium chloride

In the title salt, C₁₃H₁₄NO⁺·Cl⁻, the dihedral angle between the fused ring system (r.m.s. deviation = 0.039 Å) and the attached aldehyde group is 75.27 (16)°. In the crystal, the cation and anion are linked by an N—H⋯Cl hydrogen bond and the resulting pairs are connected into four-ion aggregates by π–π inter­actions between the C₆ and pyridinium rings [3.6450 (9) Å] of inversion-related quinolinium residues.

(2E)-1-(4-Bromo-phen-yl)-3-[3-(4-meth-oxy-phen-yl)-1-phenyl-1H-pyrazol-4-yl]prop-2-en-1-one

The pyrazole ring in the title compound, C25H19BrN2O2, is almost planar (r.m.s. deviation = 0.003 Å) and forms dihedral angles of 7.56 (13) and 56.48 (13)° with the N- and C-bound benzene rings, respectively. The prop-2-en-1-one residue has an E conformation about the C=C double bond [1.328 (4) Å] and is almost coplanar with the pyrazole ring [C-C-C-C torsion angle = -174.4 (3)°]. A twist between the prop-2-en-1-one unit and the terminal benzene ring is evident [C-C-C-C torsion angle = -15.4 (4)°]. In the crystal, mol-ecules are consolidated into a three-dimensional architecture by C-H⋯O, C-H⋯π and π-π [centroid-centroid separation = 3.7597 (16) Å] inter-actions.

(2E)-1-(2-Methyl-4-phenyl-quinolin-3-yl)-3-(3-methyl-thio-phen-2-yl)prop-2-en-1-one

In the title compound, C24H19NOS, the quinoline residue (r.m.s. deviation = 0.018 Å) is essentially orthogonal to both the phenyl [dihedral angle = 88.95 (8)°] and 2-thienyl [81.98 (9)°] rings. The carbonyl O atom lies to one side of the quinoline plane, the carbonyl C atom is almost coplanar and the remaining atoms of the chalcone residue lies to the other side, so that overall the mol-ecule has an L-shape. The conformation about the ethyl-ene bond [1.340 (2) Å] is E. In the crystal, a supra-molecular chain with the shape of a square rod aligned along the b-axis direction is sustained by C-H⋯π inter-actions, the π-systems being the heterocyclic rings.

(2E)-1-(2,4-Dimethyl-quinolin-3-yl)-3-phenyl-prop-2-en-1-one

Two independent mol-ecules comprise the asymmetric unit of the title compound, C20H17NO, which differ in the orientation of the terminal phenyl ring with respect to the quinoline ring [the dihedral angles are 75.72 (11) and 84.53 (12)° for the two mol-ecules]. The conformation about each of the ethyl-ene bonds [1.329 (3) and 1.318 (3) Å] is E. The crystal structure features a combination of C-H⋯N, C-H⋯π and π-π contacts [inter-centroid between the phenyl ring and the quinoline benzene ring is 3.6024 (19) Å], generating a three-dimensional network.

(E)-1-(2,4-Dimethyl-quinolin-3-yl)-3-(4-methyl-phen-yl)prop-2-en-1-one

In the title compound, C(21)H(19)NO, there are two mol-ecules in the asymmetric unit (Z' = 2). There are π-π inter-actions between these two mol-ecules [centroid-centroid distance = 3.678 (2) Å], as well as a weak C-H⋯O inter-action. The conformation adopted by the two mol-ecules is such that the quinoline mean plane and the benzene ring are almost perpendicular [89.04 (5) and 76.89 (4)°]. In each mol-ecule, the methyl group of the tolyl ring is disordered over two conformations, with occupancy ratios of 0.56 (3):0.44 (3) and 0.65 (3):0.35 (3).

[meso-5,10,15,20-Tetra-kis(5-bromo-thio-phen-2-yl)porphyrinato-κ(4)N,N',N'',N''']nickel(II)

The Ni(II) atom in the title porphyrin complex, [Ni(C(36)H(16)Br(4)N(4)S(4))], is in a square-planar geometry defined by four pyrrole N atoms. There is considerable buckling in the porphyrin ring with the dihedral angles between the N(4) donor set and the pyrrole rings being in the range 17.0 (3)-18.8 (3)°. Each of the six-membered chelate rings is twisted about an Ni-N bond and the dihedral angles between diagonally opposite chelate rings are 13.08 (15) and 13.45 (11)°; each pair of rings is orientated in opposite directions. The bromo-thienyl rings are twisted out of the plane of the central N(4) core with dihedral angles in the range 51.7 (2)-74.65 (19)°. Supra-molecular chains along [001] are formed through C-H⋯Br inter-actions in the crystal packing. Three of the four bromo-thienyl units are disordered over two coplanar positions of opposite orientation with the major components being in 0.691 (3), 0.738 (3) and 0.929 (9) fractions.

Nitrothienylporphyrins: Synthesis, crystal structure and, the effect of position and number of nitro groups on the spectral and electrochemical properties

This article describes the investigation on the effect of orientation of the meso thienyl groups of porphyrins in deciding the site of nitration. The thienyl rings present at the meso position is found to be more susceptible for electrophilic nitration reaction than the pyrrole β-position in the molecules where there is a better conjugation between the thienyl rings and the porphyrin π-system. Signal corresponding to the imino hydrogens in the proton NMR spectrum of meso nitrothienylporphyrins get shifted to upfield with increase in the number of nitro groups on the porphyrin. This is also due to the extended conjugation of the porphyrins π-system with the meso thienyl rings. The above observations are also supported by the redox potentials of those compounds.

3-(4-Meth-oxy-phen-yl)-1-phenyl-1H-pyrazole-4-carbaldehyde

Four independent mol-ecules comprise the asymmetric unit of the title compound, C(17)H(14)N(2)O(2). The central pyrazoline ring is flanked by an N-bound benzene ring and a C-bound meth-oxy-substituted benzene ring. The greatest difference between the independent mol-ecules is found in the relative orientations of the benzene rings with the range of dihedral angles being 23.59 (6)-42.55 (6)°. In the crystal, extensive C-H⋯O inter-actions link mol-ecules into layers parallel to (02[Formula: see text]) and these are linked by C-H⋯π contacts.

1-(6,8-Dibromo-2-methyl-quinolin-3-yl)ethanone

Two independent mol-ecules,1 and 2, with similar conformations comprise the asymmetric unit in the title compound, C(12)H(9)Br(2)NO. The major difference between the mol-ecules relates to the relative orientation of the ketone-methyl groups [the C-C-C-C torsion angles are -1.7 (6) and -16.8 (6)° for mol-ecules 1 and 2, respectively]; in each case, the ketone O atom is directed towards the ring-bound methyl group. The crystal packing comprises layers of mol-ecules, sustained by C-H⋯O and π-π {ring centroid(C(6)) of molecule 2 with NC(5) of molecule 1 [3.584 (3) Å] and NC(5) of molecule 2 [3.615 (3) Å]} interactions. C-H⋯Br contacts also occur.

3-(4-Bromo-phen-yl)-1-phenyl-1H-pyrazole-4-carbaldehyde

In the title compound, C₁₆H₁₁BrN₂O, the phenyl and chloro­benzene rings are twisted out of the mean plane of the pyrazole ring, forming dihedral angles of 13.70 (10) and 36.48 (10)°, respectively. The carbaldehyde group is also twisted out of the pyrazole plane [the C—C—C—O torsion angle is 7.9 (3)°]. A helical supra­molecular chain along the b axis and mediated by C—H⋯O inter­actions is the most prominent feature of the crystal packing.

(2E)-1-(2,4-Dimethyl-quinolin-3-yl)-3-(thio-phen-2-yl)prop-2-en-1-one

Two independent but virtually identical mol-ecules comprise the asymmetric unit in the title compound, C(18)H(15)NOS. With reference to the quinolin-3-yl group, the 3-(thio-phen-2-yl)prop-2-en-1-one residue is almost perpendicular, with all but the carbonyl O atom lying to one side of the plane. This conformation is reflected by the C-C-C-C torsion angles of -102.2 (3) and 81.1 (3)° in the two independent mol-ecules. The dihedral angle formed between the 13 non-H atoms directly associated with the quinolin-3-yl group and the thio-phen-2-yl ring is 87.70 (11)° [83.85 (10)° for the second independent mol-ecule]. The presence of C-H⋯O, C-H⋯N and π-π inter-actions [centroid-centroid distance = 3.5590 (12) Å] lead to supra-molecular chains along the c-axis direction. These are connected along the a-axis direction by C-H⋯π inter-actions. The resultant supra-molecular layers stack along the b axis.

(E)-3-[4-(Dimethyl-amino)-phen-yl]-1-(2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one 0.7-hydrate

In the title compound, C(27)H(24)N(2)O·0.7H(2)O, the quinoline ring system is approximately planar, with a maximum deviation of 0.011 (1) Å, and forms dihedral angles of 74.70 (4) and 80.14 (4)° with the phenyl and benzene rings, respectively. In the crystal, the mol-ecules are linked to the water mol-ecules via inter-molecular O-H⋯N hydrogen bonds and further stabilized by C-H⋯π inter-actions involving the centroid of the benzene ring of the quinoline group. This benzene ring is observed to form a π-π inter-action with an adjacent pyridine ring [centroid-centroid distance = 3.7120 (6) Å].

(2E)-3-(4-Chloro-phen-yl)-1-(2,4-dimethyl-quinolin-3-yl)prop-2-en-1-one

Two independent mol-ecules comprise the asymmetric unit of the title compound, C(20)H(16)ClNO, which differ in the orientation of the chalcone residue with respect to the quinoline ring [the C-C-C(=O)-C torsion angles are 69.5 (2) and 86.0 (2)°]. The configuration about each of the ethyl-ene bonds [1.342 (2) and 1.338 (2) Å] is E. The three-dimensional crystal structure is stabilized by a combination of C-H⋯O, C-H⋯N, C-H⋯π inter-actions and π-π contacts between the independent mol-ecules [Cg(C(6) of quinoline)⋯Cg(C(6) of quinoline) = 3.6719 (11) Å].

(E)-1-(2-Methyl-4-phenyl-quinolin-3-yl)-3-phenyl-prop-2-en-1-one

In the title compound, C₂₅H₁₉NO, the quinoline ring system is approximately planar, with a maximum deviation of 0.32 (1) Å, and forms dihedral angles of 80.74 (3) and 81.71 (4)° with the two phenyl rings. In the crystal. mol­ecules are stacked along the b axis by way of a C—H⋯π inter­action and a weak π–π inter­action between the pyridine and phenyl rings with a centroid–centroid distance of 3.6924 (5) Å.

2-Acetylanilinium chloride

The cation of the title salt, C₈H₁₀NO⁺·Cl⁻, is essentially planar [C—C—C—C torsion angle = 4.6 (2)°], the conformation being stabilized by an intra­molecular N—H⋯O hydrogen bond. In the crystal, centrosymmetric aggregates are formed via N—H⋯Cl hydrogen bonds. These dimeric aggregates are sustained in the crystal packing by a combination of C—H⋯Cl, C—H⋯O and C—O⋯π [O⋯ring centroid(benzene ring) = 3.1871 (13) and 3.3787 (13) Å] inter­actions.

3-(4-Chloro-phen-yl)-1-(2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one

The crystal structure of the title compound, C(25)H(18)ClNO, shows that the mol-ecules are isolated and not involved in inter-molecular C-H⋯O or C-H⋯Cl inter-actions. However, the phenyl and quinoline rings are involved in π-π inter-actions [centroid-centroid distance = 3.8829 (9) Å].

(2E)-3-(4-Eth-oxy-phen-yl)-1-(2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one monohydrate

The title hydrate, C(27)H(23)NO(2)·H(2)O, features an almost planar quinoline residue (r.m.s. deviation = 0.015 Å) with the benzene [dihedral angle = 63.80 (7) °] and chalcone [C-C-C-O torsion angle = -103.38 (18)°] substituents twisted significantly out of its plane. The configuration about the C=C bond [1.340 (2) Å] is E. In the crystal, mol-ecules related by the 2(1) symmetry operation are linked along the b axis via water mol-ecules that form O-H⋯O(c) and O-H⋯N(q) hydrogen bonds (c = carbonyl and q = quinoline). A C-H⋯O inter-action also occurs.

N,N'-Bis[(E)-(2-chloro-8-methyl-quinolin-3-yl)methyl-idene]ethane-1,2-diamine

The complete mol-ecule of the title compound, C(24)H(20)Cl(2)N(4), is generated by a crystallographic inversion centre. A kink in the mol-ecule is evident [C-N-C-C torsion angle = -147.0 (3)°] owing to the twist in the central ethyl-ene bridge. Further, there is a small twist between the imine [N=C = 1.267 (3) Å] and quinoline residues [N-C-C-C = -12.4 (4)°]. In the crystal, a combination of π-π [pyridine-benzene centroid-centroid distance = 3.5670 (14) Å] and C-H⋯N contacts leads to supra-molecular chains propagating in [010].

N,N'-Bis[(E)-(5-chloro-2-thienyl)methyl-idene]ethane-1,2-diamine

The full mol­ecule of the title compound, C₁₂H₁₀Cl₂N₂S₂, is generated by the application of a centre of inversion. The thio­phene and imine residues are co-planar [the N—C—C—S torsion angle is −2.5 (4)°] and the conformation about the imine bond [1.268 (4) Å] is E. Supra­molecular arrays are formed in the bc plane via C—Cl⋯π inter­actions and these stack along the a axis.

N,N'-Bis[(E)-(3-methyl-2-thienyl)methyl-idene]ethane-1,2-diamine

Two independent half-mol­ecules, each being completed by inversion symmetry, comprise the asymmetric unit of the title compound, C₁₄H₁₆N₂S₂. The major difference between the mol­ecules is found in the central C—C bond [the C—N—C—C torsion angles are 114.66 (18) and 128.94 (18)° in the two mol­ecules]. The thio­phene and imine groups are almost co-planar in each case [S—C—C—N torsion angles = −6.9 (2) and −3.6 (2)°]. In the crystal, the mol­ecules aggregate into supra­molecular chains via C—H⋯π inter­actions.

N,N-Bis[(2-chloro-6-methyl-quinolin-3-yl)methyl-idene]ethane-1,2-diamine

The title mol-ecule, C(24)H(20)Cl(2)N(4), lies on an inversion center in an extended trans conformation. In the crystal, weak C-H⋯Cl inter-actions connect the mol-ecules into chains along [010].

(2E)-3-(4-Methyl-phen-yl)-1-(2-methyl-4-phenyl-quinolin-3-yl)prop-2-en-1-one monohydrate

The title hydrate, C₂₆H₂₁NO·H₂O, exhibits significant twists of the benzene ring [dihedral angle = 87.24 (6)°] and chalcone residue [C—C—C—C torsion angle = −94.46 (17)°] out of the plane through the quinoline ring system. The conformation about the C=C bond [1.341 (2) Å] is E. The solvent water mol­ecule forms hydrogen bonds to carbonyl O and quinoline N atoms derived from two mol­ecules and through the application of a centre of inversion, a 16-membered {⋯HOH⋯OC₃N}₂ synthon is formed to stabilize the resulting tetra­meric (two organic mol­ecules plus two water mol­ecules) aggregate. These are connected into a two-dimensional array via two C—H⋯O contacts, also involving the water mol­ecule. The layers stack along the c axis, being linked by C—H⋯π inter­actions.

(2E)-3-(4-Bromo-phen-yl)-1-(2-methyl-4-phenyl-3-quinol-yl)prop-2-en-1-one

The conformation about the ethene bond [1.316 (3) Å] in the title compound, C₂₅H₁₈BrNO, is E. The quinoline ring forms dihedral angles of 67.21 (10) and 71.68 (10)° with the benzene and bromo-substituted benzene rings, respectively. Highlighting the non-planar arrangement of aromatic rings, the dihedral angle formed between the benzene rings is 58.57 (12)°.

6-Chloro-2-methyl-4-phenyl-3-[1-phenyl-5-(2-thien-yl)-4,5-dihydro-1H-pyrazol-3-yl]quinoline

In the title mol-ecule, C(29)H(22)ClN(3)S, the quinoline ring system, thio-phene ring and phenyl ring substituents are inclined at angles of 71.70 (7), 59.26 (9) and 81.61 (9)°, respectively, to the 4,5-dihydro-pyrazole ring. In the 4-phenyl-quinoline ring system, the phenyl ring makes a dihedral angle of 62.49 (7)° with mean plane of quinoline ring system. In the crystal structure, mol-ecules are linked via weak inter-molecular C-H⋯N hydrogen bonds, forming an extended one-dimensional chain along the b axis and are further consolidated by C-H⋯π and π-π stacking inter-actions [centroid-centroid distances = 3.7022 (10) Å].

6-Chloro-3-[5-(3-meth-oxy-8-methyl-4-quinol-yl)-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-2-methyl-4-phenyl-quinoline

In the title compound, C(36)H(29)ClN(4)O, the dihydro-pyrazole ring adopts an envelope conformation. The two quinoline ring systems (r.m.s. deviations = 0.029 and 0.018 Å) are oriented at a dihedral angle of 71.43 (4)°. One of the quinoline rings makes a dihedral angle of 65.40 (7)° with the phenyl substituent. In the crystal, mol-ecules are linked into chains along the b axis by inter-molecular C-H⋯N hydrogen bonds. In addition, C-H⋯π and π-π [centroid-centroid distance = 3.7325 (8) Å] inter-actions are observed.