6-Methyl-2-oxo-N-(quinolin-6-yl)-2H-chromene-3-carboxamide: crystal structure and Hirshfeld surface analysis

Gomes, L.R.; Low, J.N.; Fonseca, A.; Matos, M.J.; Borges, F.

doi:10.1107/S2056989016011026

research communications

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 72| Part 8| August 2016| Pages 1121-1125

https://doi.org/10.1107/S2056989016011026

Open

access

6-Methyl-2-oxo-N-(quinolin-6-yl)-2H-chromene-3-carboxamide: crystal structure and Hirshfeld surface analysis

Lígia R. Gomes,^a,^b John Nicolson Low,^c ^* André Fonseca,^d Maria João Matos ^d and Fernanda Borges ^d

^aFP–ENAS–Faculdade de Ciências de Saúde, Escola Superior de Saúde da UFP, Universidade Fernando Pessoa, Rua Carlos da Maia, 296, P-4200-150 Porto, Portugal, ^bREQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal, ^cDepartment of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, Scotland, and ^dCIQUP/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
^*Correspondence e-mail: jnlow111@gmail.com

Edited by W. T. A. Harrison, University of Aberdeen, Scotland (Received 1 July 2016; accepted 7 July 2016; online 12 July 2016)

The title coumarin derivative, C₂₀H₁₄N₂O₃, displays intramolecular N—H⋯O and weak C—H⋯O hydrogen bonds, which probably contribute to the approximate planarity of the molecule [dihedral angle between the coumarin and quinoline ring systems = 6.08 (6)°]. The supramolecular structures feature C—H⋯O hydrogen bonds and π–π interactions, as confirmed by Hirshfeld surface analyses.

Keywords: crystal structure; coumarin; carboxamide; Hirshfeld surface analysis.

CCDC reference: 1491340

1. Chemical context

Coumarin and its derivatives are widely recognized by their unique biological properties (Matos et al., 2014 $[Matos, M. J., Janeiro, P., Gonz\'alez Franco, R. M., Vilar, S., Tatonetti, N. P., Santana, L., Uriarte, E., Borges, F., Fontenla, J. A. & Viña, D. (2014). Future Med. Chem. 6, 371-383.]$ ; Vazquez-Rodriguez et al., 2013 ; Chimenti et al., 2010 ). Our work in this area has shown that coumarin is a valid scaffold for the development of new drugs for aging related diseases, specifically within the class of monoamino oxidase B inhibitors (Matos et al., 2009 ). On the other hand, quinoline is a nitrogen heterocycle also often used in drug-discovery programs due to its remarkable biological properties, some of them related to neurodegenerative diseases (Sridharan et al., 2011 ), for instance, as γ-secretase and acetylcholinesterase inhibitors (Camps et al., 2009 ). As part of our ongoing studies in this area (Gomes et al., 2016 ), we describe the synthesis and crystal structure of the title coumarin–quinoline hybrid, 6-methyl-2-oxo-N-(quinolin-6-yl)-2H-chromene-3-carboxamide, (1) (see Scheme).

2. Structural commentary

Fig. 1 shows an ellipsoid plot of the molecular structure of (1). An inspection of the bond lengths shows that there is a slight asymmetry of the electronic distribution around the coumarin ring: the C3—C4 [1.3609 (15) Å] and C3—C2 [1.4600 (18) Å)] bond lengths are shorter and longer, respectively, than those expected for a C_ar—C_ar bond, suggesting that the electronic density is rather located near the C3—C4 bond at the pyrone ring, as occurs in other coumarin-3-carboxamide derivatives (Gomes et al., 2016). Also, the C3—C31 bond length [1.5075 (18) Å] is similar to the mean value displayed by other coumarin-3-carboxamide derivatives previously characterized (Gomes et al., 2016) and is of the same order as a Csp³—Csp³ bond.

Figure 1
A view of the asymmetric unit of (1), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 70% probability level.

The C—N rotamer of the amide group governs the conformation of the molecule: the −anti orientation where the N atom is −cis positioned with respect to the oxo O atom of the coumarin system allows the establishment of an intramolecular N32—H32⋯O2 hydrogen bond between the amino group of the carboxamide and the oxo group of the coumarin system, and of a weak intramolecular C317—H317⋯O31 hydrogen bond that connects the quinoline ring with the O atom of the carboxamide group (Table 1). Both these interactions form S(6) rings and connect the spacer carboxamide group with the heteroaromatic rings, probably constraining the rotation/bending of those rings with respect to the plane formed by the amide atoms. In fact, the molecule is roughly planar, as may be evaluated by the set of values for the dihedral angles which are less than 7° (Table 2).

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C314—H314⋯O31ⁱ	0.95	2.50	3.278 (2)	139
C8—H8⋯N311ⁱⁱ	0.95	2.68	3.394 (3)	133
C317—H317⋯O31	0.95	2.29	2.903 (2)	122
N32—H32⋯O2	0.907 (18)	1.879 (18)	2.686 (2)	147.3 (15)
Symmetry codes: (i) x+1, y, z; (ii) $[x-{\script{1\over 2}}, -y+{\script{1\over 2}}, z-{\script{1\over 2}}]$ ; (iii) x-1, y, z.

Table 2
Selected dihedral angles (°)

Compound	θ₁ (°)	θ₂ (°)	θ₃ (°)
(1)	6.08 (6)	5.0 (12)	1.73 (11)
Notes: θ₁ is the dihedral angle between the mean planes of the coumarin and quinoline rings; θ₂ is the dihedral angle between the mean plane of the coumarin ring and the plane defined by atoms O31/C31/N32; θ₃ is the dihedral angle between the mean plane of the quinoline ring and the plane defined by atoms O31/C31/N32.

3. Supramolecular features

In the crystal of (1), molecules are linked by a weak C314—H314⋯O31ⁱ hydrogen bond to form a C(8) chain, which runs parallel to the a axis (Fig. 2 and Table 1). There are several π–π contacts that will be described below.

Figure 2
The simple C4 chain in compound (1) formed by the weak C314—H314⋯O3ⁱ hydrogen bond. This chain extends by unit translation along the a axis. H atoms not involved in the hydrogen bonding have been omitted. [Symmetry codes: (i) x − 1, y, z; (ii) x + 1,y, z.]

4. Hirshfeld surface analyses

The Hirshfeld surfaces and two-dimensional fingerprint (FP) plots (Rohl et al., 2008 ) were generated using Crystal Explorer (Wolff et al., 2012 ). Compound (1) has three O atoms and an N atom that can potentially act as acceptors for hydrogen bonds, but one of the lone pairs of the oxo O atoms of the coumarin nucleus and of the amide moiety are involved in the establishment of intramolecular hydrogen bonds, as discussed above. As such, they contribute to the electronic density of the pro-molecule in the calculation of the Hirshfeld surface, leaving only the remaining pairs available for participation in the supramolecular structure formation. The surface mapped over d_norm displays several red spots that correspond to areas of close contacts between the surface and the neighbouring environment, and the FP plot is presented in Fig. 3.

Figure 3
Views of the Hirshfeld surface mapped over d_norm (left) and fingerprint plot (right, FP) for (1). The highlighted red spots on the top face of the surfaces indicate contact points with the atoms participating in the intermolecular C—H⋯O interactions, whereas those on the middle of the surface corresponds to C⋯C contacts consequent of the π–π stacking. The C⋯C contacts contribute to the higher frequency of the pixels at d_e/d_i at 1.8° on the FP plot (yellow spot). The FP plot displays two light-blue spikes (external ends corresponding to C⋯ H contacts).

The contributions from various contacts, listed in Table 3, were selected by partial analysis of the FP plot. Taking out the H⋯H contacts on the surface that are inherent to organic molecules, the most significant contacts can be divided in three groups: (i) H⋯O/O⋯H together with H⋯N/N⋯H that correspond to weak C—H⋯O/N intermolecular interactions (24.5%); (ii) C⋯C and N⋯C/C⋯N contacts that are related with π–π stacking (17.9%): (iii) H⋯C/C⋯H contacts (14.3%).

Table 3
Percentages of atom–atom contacts for (1) (%)

Contact	H⋯H	H⋯O/O⋯H	H⋯N/N⋯H	C⋯C	N⋯C/C⋯N	H⋯C/C⋯H
(%)	40.6	21.2	3.3	13.2	4.7	14.3

The H⋯N/O contacts appear as three highlighted red spots on the top and bottom edges of the surface which form pairs of spots of comlementary size, indicating the contact points of the labelled atoms participating in the C–H⋯N/O interactions (Fig. 3). The strongest spots correspond to oxo atom O31 of the carboxamide acceptor and donor atom H314, which forms the C314—H314⋯O31ⁱ hydrogen bond (Table 1), and the other spots correspond to very weak hydrogen-bond contacts, one involving pyrone atom O1 and a H atom of the methyl group (C61—H61B⋯O1ⁱⁱ; Table 1), and the other appearing perpendicular to the quinoline N atom indicating a very weak C8—H8⋯N311ⁱⁱ contact (Table 1). In spite of the weakness of these contacts, their relative strength is reflected in the FP plots where the pair of sharp spikes pointing to south-west is highlighted in light blue.

In this structure, C/N⋯C contacts prevail over the C—H⋯C ones. In fact, the packing in (1) is built up by several π–π interactions (Table 4). The red spots in the frontal zone of the surface correspond to these close contacts. Furthermore, the FP plot also reveals an intense cluster at d_e/d_i at 1.8 Å characteristic of C⋯C contacts. Also, when the surface is mapped with shape index, several complementary triangular red hollows and blue bumps appear that are characteristic of the six-ring stacking (Fig. 4). The molecules stack in a column in a head-to-tail fashion along the b axis (Fig. 5). The molecules in these stacks lie across centres of symmetry at ( $[1 \over 2]$ , 1, $[1 \over 2]$ ), a centrosymetrically related contact between the pyran and pyridine rings, and across the centre at ( $[1 \over 2]$ , $[1 \over 2]$ , $[1 \over 2]$ ), which involves three short centrosymmetrically related contacts: (i) between the pyran and pyridine rings, (ii) between the pyran ring and the quinoline phenyl ring and (iii) between the coumarin phenyl ring and the pyridine ring.

Table 4
Selected π–π contacts

Compound	CgI	CgJ(aru)	Cg–Cg (Å)	CgI_Perp (Å)	CgJ_Perp (Å)	Slippage (Å)
1	Cg1	Cg2(−x + 1, −y, −z − 1)	3.548 (2)	3.1477 (4)	3.3051 (4)	1.290
1	Cg1	Cg2(−x + 1, −y + 1, −z − 1)	3.911 (3)	−3.3848 (4)	−3.3352 (4)	2.043
1	Cg1	Cg4(−x + 1, −y + 1, −z − 1)	3.525 (2)	−3.3851 (4)	−3.2952 (4)	1.252
1	Cg2	Cg1(−x + 1, −y, −z − 1)	3.548 (2)	3.3050 (4)	3.1476 (4)	1.637
1	Cg2	Cg1(−x + 1, −y + 1, −z − 1)	3.911 (3)	−3.3352 (4)	−3.3849 (4)	1.960
1	Cg2	Cg3(−x + 1, −y + 1, −z − 1)	3.797 (3)	−3.3389 (4)	−3.5276 (5)	1.406
1	Cg3	Cg2(−x + 1, −y + 1, −z − 1)	3.798 (3)	−3.5277 (5)	−3.3388 (4)	1.809
1	Cg4	Cg1(−x + 1, −y + 1, −z − 1)	3.525 (2)	−3.2951 (4)	−3.3852 (4)	0.983
Notes: CgI(J) = Plane number I(J); Cg–Cg = distance between ring centroids; CgI_Perp = perpendicular distance of CgI on ring J; CgJ_Perp = perpendicular distance of CgJ on ring I; Slippage = distance between CgI and perpendicular projection of CgJ on ring I.Plane 1 is the plane of the coumarin pyran ring with Cg1 as centroid; Plane 2 is the plane of the quinoline pyridine ring with Cg2 as centroid; Plane 3 is the plane of the coumarin phenyl ring with Cg3 as centroid; Plane 4 is the plane of the quinoline phenyl ring with Cg4 as centroid.Some planes are repeated since they are inclined to each other and as a result give slightly different slippages

Figure 4
Shape index plots showing the interactions arising from π–π stacking. The upper corresponds to the stacking across ( $[1 \over 2]$ , 1, $[1 \over 2]$ ), while the lower corresponds to the stacking across ( $[1 \over 2]$ , $[1 \over 2]$ , $[1 \over 2]$ ).

Figure 5
View of the π–π stacking along the b axis.

5. Database survey

As reported by Gomes et al. (2016), a search made in the Cambridge Structural Database (CSD, Version 35.7; Groom et al., 2016 ) revealed the existence of 35 deposited compounds (42 molecules) containing the coumarin carboxamide unit, all of which contained the same intramolecular hydrogen bonds. The present compound also contains these bonds, as described above.

6. Synthesis and crystallization

6-Methylcoumarin-3-carboxylic acid (Murata et al.., 2005 ) (1 mmol) was dissolved in dichloromethane and 3-[3-(dimethylamino)propyl]-1-ethylcarbodiimide (1.10 mmol) and 4-dimethylaminopyridine (1.10 mmol) were added. The mixture was kept under a flux of argon at 273 K for 5 min. 6-Aminoquinoline (1 mmol) was then added in small portions. The reaction mixture was stirred for 4 h at room temperature. The obtained precipitate was filtered off and recrystallized from methanol to give colourless needles of (1). Overall yield: 53%; m.p. 545–546 K.

7. Refinement

H atoms were treated as riding atoms, with aromatic C—H = 0.95 Å, with U_iso(H) = 1.2U_eq(C), and methyl C—H = 0.98 Å, with U_iso(H) = 1.5U_eq(C). The amino H atoms were freely refined. Crystal data, data collection and structure refinement details are summarized in Table 5.

Table 5
Experimental details

Crystal data
Chemical formula	C₂₀H₁₄N₂O₃
M_r	330.33
Crystal system, space group	Monoclinic, P2₁/n
Temperature (K)	100
a, b, c (Å)	7.799 (3), 7.014 (3), 27.640 (18)
β (°)	90.18 (6)
V (Å³)	1512.0 (13)
Z	4
Radiation type	Synchrotron, λ = 0.68891 Å
μ (mm⁻¹)	0.09
Crystal size (mm)	0.18 × 0.01 × 0.004

Data collection
Diffractometer	Three-circle diffractometer
Absorption correction	Empirical (using intensity measurements) (aimless CCP4; Evans, 2006 )
No. of measured, independent and observed [I > 2σ(I)] reflections	18408, 4587, 3717
R_int	0.060
(sin θ/λ)_max (Å⁻¹)	0.714

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.051, 0.156, 1.13
No. of reflections	4587
No. of parameters	231
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.54, −0.25
Computer programs: GDA https://www.opengda.org/OpenGDA.html, XIA2 0.4.0.370-g47f3bc3 (Winter, 2010 ), SHELXT (Sheldrick, 2015a ), ShelXle (Hübschle et al., 2011 ), SHELXL2014 (Sheldrick, 2015b ), Mercury (Macrae et al., 2006 ) and PLATON (Spek, 2009 ).

Supporting information

CCDC reference: 1491340

Crystal structure: contains datablocks 1, general. DOI: https://doi.org/10.1107/S2056989016011026/hb7596sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989016011026/hb7596Isup2.hkl

checkCIF report

Computing details top

Data collection: GDA https://www.opengda.org/OpenGDA.html; cell refinement: XIA2 0.4.0.370-g47f3bc3, (Winter, 2010; data reduction: XIA2 0.4.0.370-g47f3bc3 (Winter, 2010; program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: ShelXle (Hübschle et al., 2011) SHELXL2014/7 (Sheldrick, 2015b); molecular graphics: Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL2014/17 (Sheldrick, 2015b) PLATON (Spek, 2009).

(I) top

Crystal data top

C₂₀H₁₄N₂O₃	F(000) = 688
M_r = 330.33	D_x = 1.451 Mg m⁻³
Monoclinic, P2₁/n	Synchrotron' radiation, λ = 0.68891 Å
a = 7.799 (3) Å	Cell parameters from 3773 reflections
b = 7.014 (3) Å	θ = 2.6–33.9°
c = 27.640 (18) Å	µ = 0.09 mm⁻¹
β = 90.18 (6)°	T = 100 K
V = 1512.0 (13) Å³	Needle, colourless
Z = 4	0.18 × 0.01 × 0.004 mm

Data collection top

Three-circle diffractometer	4587 independent reflections
Radiation source: synchrotron, DLS beamline I19, undulator	3717 reflections with I > 2σ(I)
Si 111, double crystal monochromator	R_int = 0.060
Detector resolution: 5.81 pixels mm^-1	θ_max = 29.5°, θ_min = 2.9°
profile data from ω–scans	h = −11→11
Absorption correction: empirical (using intensity measurements) aimless ccp4 (Evans, 2006)	k = −10→10
	l = −39→39
18408 measured reflections

Refinement top

Refinement on F²	0 restraints
Least-squares matrix: full	Hydrogen site location: mixed
R[F² > 2σ(F²)] = 0.051	H atoms treated by a mixture of independent and constrained refinement
wR(F²) = 0.156	w = 1/[σ²(F_o²) + (0.0954P)²] where P = (F_o² + 2F_c²)/3
S = 1.13	(Δ/σ)_max = 0.001
4587 reflections	Δρ_max = 0.54 e Å⁻³
231 parameters	Δρ_min = −0.25 e Å⁻³

Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
O1	0.61633 (10)	0.57511 (12)	0.33247 (3)	0.02193 (19)
O2	0.42390 (10)	0.67655 (12)	0.38475 (3)	0.0244 (2)
O31	0.79011 (10)	0.65810 (12)	0.49728 (3)	0.0240 (2)
N32	0.50968 (12)	0.71842 (13)	0.47835 (3)	0.0186 (2)
N311	0.21868 (12)	0.98576 (13)	0.65151 (3)	0.0204 (2)
C2	0.57274 (14)	0.62613 (16)	0.37867 (4)	0.0196 (2)
C3	0.70619 (13)	0.61438 (15)	0.41571 (4)	0.0177 (2)
C4	0.86585 (13)	0.55411 (15)	0.40316 (4)	0.0180 (2)
H4	0.9519	0.5451	0.4275	0.022*
C5	1.07250 (14)	0.44450 (15)	0.33910 (4)	0.0200 (2)
H5	1.1628	0.4362	0.3622	0.024*
C4A	0.90818 (14)	0.50369 (15)	0.35425 (4)	0.0182 (2)
C6	1.10480 (15)	0.39806 (16)	0.29103 (4)	0.0222 (2)
C7	0.97020 (15)	0.41362 (17)	0.25763 (4)	0.0238 (2)
H7	0.9904	0.3821	0.2247	0.029*
C8	0.80789 (15)	0.47398 (17)	0.27134 (4)	0.0230 (2)
H8	0.7184	0.4858	0.2482	0.028*
C8A	0.77937 (14)	0.51669 (16)	0.31972 (4)	0.0195 (2)
C31	0.67345 (13)	0.66578 (15)	0.46783 (4)	0.0185 (2)
C34A	0.18814 (13)	0.89163 (15)	0.56639 (4)	0.0176 (2)
C38A	0.28705 (13)	0.91692 (15)	0.60890 (4)	0.0178 (2)
C61	1.27981 (16)	0.3329 (2)	0.27477 (5)	0.0312 (3)
H61A	1.3103	0.2147	0.2916	0.047*
H61B	1.3647	0.4316	0.2824	0.047*
H61C	1.2781	0.3101	0.2398	0.047*
C312	0.05500 (14)	1.03063 (16)	0.65149 (4)	0.0219 (2)
H312	0.0075	1.0795	0.6806	0.026*
C313	−0.05445 (14)	1.01098 (16)	0.61122 (4)	0.0219 (2)
H313	−0.1717	1.0466	0.6133	0.026*
C314	0.01123 (13)	0.93934 (16)	0.56876 (4)	0.0199 (2)
H314	−0.0609	0.9220	0.5413	0.024*
C315	0.26757 (13)	0.82186 (15)	0.52375 (4)	0.0183 (2)
H315	0.2006	0.8037	0.4954	0.022*
C316	0.44016 (14)	0.78004 (15)	0.52286 (4)	0.0178 (2)
C317	0.53856 (14)	0.80040 (16)	0.56555 (4)	0.0197 (2)
H317	0.6569	0.7683	0.5655	0.024*
C318	0.46224 (14)	0.86712 (16)	0.60735 (4)	0.0198 (2)
H318	0.5297	0.8798	0.6358	0.024*
H32	0.440 (2)	0.709 (3)	0.4521 (6)	0.042 (5)*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
O1	0.0188 (4)	0.0271 (4)	0.0199 (4)	−0.0001 (3)	0.0003 (3)	−0.0025 (3)
O2	0.0186 (4)	0.0295 (5)	0.0250 (4)	0.0018 (3)	−0.0007 (3)	−0.0027 (3)
O31	0.0209 (4)	0.0295 (5)	0.0216 (4)	0.0024 (3)	−0.0005 (3)	−0.0043 (3)
N32	0.0184 (4)	0.0194 (5)	0.0180 (4)	0.0012 (3)	0.0018 (3)	−0.0009 (3)
N311	0.0226 (4)	0.0201 (5)	0.0186 (5)	−0.0011 (3)	0.0019 (3)	−0.0011 (3)
C2	0.0200 (5)	0.0186 (5)	0.0203 (5)	−0.0020 (4)	0.0014 (4)	−0.0007 (4)
C3	0.0185 (5)	0.0164 (5)	0.0183 (5)	−0.0012 (4)	0.0012 (4)	−0.0004 (4)
C4	0.0192 (5)	0.0155 (5)	0.0193 (5)	−0.0012 (4)	0.0008 (4)	0.0000 (4)
C5	0.0208 (5)	0.0178 (5)	0.0214 (5)	−0.0001 (4)	0.0019 (4)	−0.0001 (4)
C4A	0.0199 (5)	0.0154 (5)	0.0194 (5)	−0.0022 (4)	0.0021 (4)	−0.0006 (4)
C6	0.0242 (5)	0.0197 (5)	0.0227 (5)	−0.0012 (4)	0.0046 (4)	−0.0018 (4)
C7	0.0273 (5)	0.0240 (6)	0.0202 (5)	−0.0030 (4)	0.0042 (4)	−0.0024 (4)
C8	0.0248 (5)	0.0258 (6)	0.0185 (5)	−0.0030 (4)	−0.0011 (4)	−0.0013 (4)
C8A	0.0188 (5)	0.0193 (5)	0.0202 (5)	−0.0024 (4)	0.0021 (4)	−0.0007 (4)
C31	0.0194 (5)	0.0151 (5)	0.0212 (5)	−0.0009 (4)	0.0025 (4)	−0.0005 (4)
C34A	0.0178 (5)	0.0144 (5)	0.0205 (5)	−0.0002 (3)	0.0016 (4)	0.0011 (4)
C38A	0.0194 (5)	0.0158 (5)	0.0181 (5)	−0.0013 (4)	0.0016 (4)	0.0003 (4)
C61	0.0253 (6)	0.0408 (8)	0.0274 (6)	0.0069 (5)	0.0052 (5)	−0.0060 (5)
C312	0.0238 (5)	0.0204 (5)	0.0214 (5)	−0.0012 (4)	0.0057 (4)	−0.0012 (4)
C313	0.0188 (5)	0.0216 (5)	0.0251 (6)	0.0002 (4)	0.0032 (4)	0.0006 (4)
C314	0.0180 (5)	0.0202 (5)	0.0215 (5)	−0.0006 (4)	−0.0001 (4)	0.0015 (4)
C315	0.0195 (5)	0.0167 (5)	0.0188 (5)	0.0004 (4)	−0.0001 (4)	0.0003 (4)
C316	0.0201 (5)	0.0148 (5)	0.0185 (5)	−0.0001 (4)	0.0029 (4)	0.0006 (4)
C317	0.0183 (5)	0.0203 (5)	0.0206 (5)	0.0010 (4)	0.0016 (4)	0.0002 (4)
C318	0.0204 (5)	0.0207 (5)	0.0185 (5)	−0.0005 (4)	−0.0011 (4)	−0.0002 (4)

Geometric parameters (Å, º) top

O1—C2	1.3701 (16)	C7—H7	0.9500
O1—C8A	1.3827 (14)	C8—C8A	1.3887 (18)
O2—C2	1.2255 (14)	C8—H8	0.9500
O31—C31	1.2201 (16)	C34A—C38A	1.4149 (18)
N32—C31	1.3618 (14)	C34A—C315	1.4200 (17)
N32—C316	1.4136 (16)	C34A—C314	1.4214 (15)
N32—H32	0.907 (18)	C38A—C318	1.4111 (16)
N311—C312	1.3147 (15)	C61—H61A	0.9800
N311—C38A	1.3814 (16)	C61—H61B	0.9800
C2—C3	1.4600 (18)	C61—H61C	0.9800
C3—C4	1.3609 (15)	C312—C313	1.4075 (19)
C3—C31	1.5075 (18)	C312—H312	0.9500
C4—C4A	1.4368 (17)	C313—C314	1.3769 (17)
C4—H4	0.9500	C313—H313	0.9500
C5—C6	1.3918 (18)	C314—H314	0.9500
C5—C4A	1.4119 (16)	C315—C316	1.3779 (15)
C5—H5	0.9500	C315—H315	0.9500
C4A—C8A	1.3866 (18)	C316—C317	1.4128 (18)
C6—C7	1.4000 (19)	C317—C318	1.3830 (17)
C6—C61	1.5092 (17)	C317—H317	0.9500
C7—C8	1.3886 (17)	C318—H318	0.9500

C2—O1—C8A	123.10 (10)	N32—C31—C3	115.51 (11)
C31—N32—C316	129.15 (11)	C38A—C34A—C315	119.63 (10)
C31—N32—H32	111.5 (11)	C38A—C34A—C314	117.32 (10)
C316—N32—H32	119.3 (11)	C315—C34A—C314	123.05 (11)
C312—N311—C38A	117.43 (11)	N311—C38A—C318	119.26 (11)
O2—C2—O1	116.17 (11)	N311—C38A—C34A	122.75 (10)
O2—C2—C3	126.42 (11)	C318—C38A—C34A	117.98 (10)
O1—C2—C3	117.42 (10)	C6—C61—H61A	109.5
C4—C3—C2	119.32 (11)	C6—C61—H61B	109.5
C4—C3—C31	118.40 (11)	H61A—C61—H61B	109.5
C2—C3—C31	122.28 (10)	C6—C61—H61C	109.5
C3—C4—C4A	121.96 (11)	H61A—C61—H61C	109.5
C3—C4—H4	119.0	H61B—C61—H61C	109.5
C4A—C4—H4	119.0	N311—C312—C313	124.28 (11)
C6—C5—C4A	121.27 (12)	N311—C312—H312	117.9
C6—C5—H5	119.4	C313—C312—H312	117.9
C4A—C5—H5	119.4	C314—C313—C312	118.92 (10)
C8A—C4A—C5	118.13 (11)	C314—C313—H313	120.5
C8A—C4A—C4	117.61 (11)	C312—C313—H313	120.5
C5—C4A—C4	124.25 (11)	C313—C314—C34A	119.27 (11)
C5—C6—C7	118.28 (11)	C313—C314—H314	120.4
C5—C6—C61	121.45 (12)	C34A—C314—H314	120.4
C7—C6—C61	120.28 (11)	C316—C315—C34A	121.13 (11)
C8—C7—C6	121.73 (11)	C316—C315—H315	119.4
C8—C7—H7	119.1	C34A—C315—H315	119.4
C6—C7—H7	119.1	C315—C316—C317	119.45 (11)
C7—C8—C8A	118.52 (12)	C315—C316—N32	117.26 (11)
C7—C8—H8	120.7	C317—C316—N32	123.29 (10)
C8A—C8—H8	120.7	C318—C317—C316	119.86 (10)
O1—C8A—C4A	120.59 (10)	C318—C317—H317	120.1
O1—C8A—C8	117.36 (11)	C316—C317—H317	120.1
C4A—C8A—C8	122.06 (11)	C317—C318—C38A	121.90 (11)
O31—C31—N32	124.57 (11)	C317—C318—H318	119.0
O31—C31—C3	119.91 (10)	C38A—C318—H318	119.0

C8A—O1—C2—O2	179.41 (9)	C4—C3—C31—O31	2.12 (16)
C8A—O1—C2—C3	−0.94 (15)	C2—C3—C31—O31	−178.23 (10)
O2—C2—C3—C4	179.54 (11)	C4—C3—C31—N32	−177.74 (9)
O1—C2—C3—C4	−0.06 (15)	C2—C3—C31—N32	1.91 (15)
O2—C2—C3—C31	−0.09 (18)	C312—N311—C38A—C318	179.98 (10)
O1—C2—C3—C31	−179.70 (9)	C312—N311—C38A—C34A	−0.77 (16)
C2—C3—C4—C4A	0.81 (16)	C315—C34A—C38A—N311	179.40 (10)
C31—C3—C4—C4A	−179.54 (9)	C314—C34A—C38A—N311	−0.32 (16)
C6—C5—C4A—C8A	−0.76 (16)	C315—C34A—C38A—C318	−1.34 (15)
C6—C5—C4A—C4	−179.86 (10)	C314—C34A—C38A—C318	178.94 (10)
C3—C4—C4A—C8A	−0.58 (16)	C38A—N311—C312—C313	0.74 (17)
C3—C4—C4A—C5	178.52 (10)	N311—C312—C313—C314	0.39 (18)
C4A—C5—C6—C7	0.76 (17)	C312—C313—C314—C34A	−1.51 (16)
C4A—C5—C6—C61	−179.40 (11)	C38A—C34A—C314—C313	1.45 (15)
C5—C6—C7—C8	0.15 (18)	C315—C34A—C314—C313	−178.25 (10)
C61—C6—C7—C8	−179.69 (11)	C38A—C34A—C315—C316	−0.68 (16)
C6—C7—C8—C8A	−1.03 (18)	C314—C34A—C315—C316	179.02 (10)
C2—O1—C8A—C4A	1.19 (16)	C34A—C315—C316—C317	2.29 (16)
C2—O1—C8A—C8	−178.25 (10)	C34A—C315—C316—N32	−177.58 (9)
C5—C4A—C8A—O1	−179.57 (9)	C31—N32—C316—C315	−178.87 (10)
C4—C4A—C8A—O1	−0.41 (15)	C31—N32—C316—C317	1.27 (18)
C5—C4A—C8A—C8	−0.15 (17)	C315—C316—C317—C318	−1.86 (16)
C4—C4A—C8A—C8	179.00 (10)	N32—C316—C317—C318	178.01 (10)
C7—C8—C8A—O1	−179.54 (10)	C316—C317—C318—C38A	−0.20 (17)
C7—C8—C8A—C4A	1.03 (18)	N311—C38A—C318—C317	−178.93 (10)
C316—N32—C31—O31	2.43 (19)	C34A—C38A—C318—C317	1.78 (16)
C316—N32—C31—C3	−177.72 (10)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C314—H314···O31ⁱ	0.95	2.50	3.278 (2)	139
C8—H8···N311ⁱⁱ	0.95	2.68	3.394 (3)	133
C317—H317···O31	0.95	2.29	2.903 (2)	122
N32—H32···O2	0.907 (18)	1.879 (18)	2.686 (2)	147.3 (15)

Symmetry codes: (i) x−1, y, z; (ii) x+1/2, −y+3/2, z−1/2.

Selected dihedral angles (°) top

Compound	θ₁ (°)	θ₂ (°)	θ₃ (°)
(1)	6.08 (6)	5.0 (12)	1.73 (11)

Notes: θ₁ is the dihedral angle between the mean planes of the coumarin ring and quinoline ring; θ₂ is the dihedral angle between the mean plane of the coumarin ring and the plane defined by atoms O31/C31/N32; θ₃ is the dihedral angle between the mean plane of the quinoline ring and the plane defined by atoms O31/C31/N32.

Selected π–π contacts top

Compound	CgI	CgJ(aru)	Cg–Cg (Å)	CgI_Perp (Å)	CgJ_Perp (Å)	Slippage (Å)
1	Cg1	Cg2(-x+1, -y, -z-1)	3.548 (2)	3.1477 (4)	3.3051 (4)	1.290
1	Cg1	Cg2(-x+1, -y+1, -z-1)	3.911 (3)	-3.3848 (4)	-3.3352 (4)	2.043
1	Cg1	Cg4(-x+1, -y+1, -z-1)	3.525 (2)	-3.3851 (4)	-3.2952 (4)	1.252
1	Cg2	Cg1(-x+1, -y, -z-1)	3.548 (2)	3.3050 (4)	3.1476 (4)	1.637
1	Cg2	Cg1(-x+1, -y+1, -z-1)	3.911 (3)	-3.3352 (4)	-3.3849 (4)	1.960
1	Cg2	Cg3(-x+1, -y+1, -z-1)	3.797 (3)	-3.3389 (4)	-3.5276 (5)	1.406
1	Cg3	Cg2(-x+1, -y+1, -z-1)	3.798 (3)	-3.5277 (5)	-3.3388 (4)	1.809
1	Cg4	Cg1(-x+1, -y+1, -z-1)	3.525 (2)	-3.2951 (4)	-3.3852 (4)	0.983

Notes: CgI(J) = Plane number I(J); Cg–Cg = distance between ring centroids; CgI_Perp = perpendicular distance of CgI on ring J; CgJ_Perp = perpendicular distance of CgJ on ring I; Slippage = distance between CgI and perpendicular projection of CgJ on ring I.

Plane 1 is the plane of the coumarin pyran ring with Cg1 as centroid; Plane 2 is the plane of the quinoline pyridine ring with Cg2 as centroid; Plane 3 is the plane of the coumarin phenyl ring with Cg3 as centroid; Plane 4 is the plane of the quinoline phenyl ring with Cg4 as centroid.

Some planes are repeated since they are inclined to each other and as a result give slightly different slippages

Percentages of atom–atom contacts for (1) (%) top

Contact	H···H	H···O/O···H	H···N/N···H	C···C	N···C/C···N	H···C/C···H
(%)	40.6	21.2	3.3	13.2	4.7	14.3

Selected dihedral angles (°) top

Compound	θ₁ (°)	θ₂ (°)	θ₃ (°)
(1)	6.08 (6)	5.0 (12)	1.73 (11)

Selected π–π contacts top

Compound	CgI	CgJ(aru)	Cg–Cg (Å)	CgI_Perp (Å)	CgJ_Perp (Å)	Slippage (Å)
1	Cg1	Cg2(-x+1, -y, -z-1)	3.548 (2)	3.1477 (4)	3.3051 (4)	1.290
1	Cg1	Cg2(-x+1, -y+1, -z-1)	3.911 (3)	-3.3848 (4)	-3.3352 (4)	2.043
1	Cg1	Cg4(-x+1, -y+1, -z-1)	3.525 (2)	-3.3851 (4)	-3.2952 (4)	1.252
1	Cg2	Cg1(-x+1, -y, -z-1)	3.548 (2)	3.3050 (4)	3.1476 (4)	1.637
1	Cg2	Cg1(-x+1, -y+1, -z-1)	3.911 (3)	-3.3352 (4)	-3.3849 (4)	1.960
1	Cg2	Cg3(-x+1, -y+1, -z-1)	3.797 (3)	-3.3389 (4)	-3.5276 (5)	1.406
1	Cg3	Cg2(-x+1, -y+1, -z-1)	3.798 (3)	-3.5277 (5)	-3.3388 (4)	1.809
1	Cg4	Cg1(-x+1, -y+1, -z-1)	3.525 (2)	-3.2951 (4)	-3.3852 (4)	0.983

Percentages of atom–atom contacts for (1) (%) top

Contact	H···H	H···O/O···H	H···N/N···H	C···C	N···C/C···N	H···C/C···H
(%)	40.6	21.2	3.3	13.2	4.7	14.3

Acknowledgements

The authors thank the staff at the National Crystallographic Service, University of Southampton, for the data collection, help and advice (Coles & Gale, 2012 ), and the Foundation for Science and Technology (FCT) and FEDER/COMPETE2020 (UID/QUι00081/2015 and POCI-01–0145-FEDER-006980). AF (SFRH/BD/80831/2011) and MJM (SFRH/BPD/95345/2013) were supported by grants from FCT, POPH and QREN.

References

Camps, P., Formosa, X., Galdeano, C., Muñoz-Torrero, D., Ramírez, L., Gómez, E., Isambert, N., Lavilla, R., Badia, A., Clos, M. V., Bartolini, M., Mancini, F., Andrisano, V., Arce, M. P., Rodríguez-Franco, M. I., Huertas, O., Dafni, T. & Luque, F. J. (2009). J. Med. Chem. 52, 5365–5379. Web of Science CrossRef PubMed CAS Google Scholar
Chimenti, F., Bizzarri, B., Bolasco, A., Secci, D., Chimenti, P., Granese, A., Carradori, S., Rivanera, D., Zicari, A., Scaltrito, M. M. & Sisto, F. (2010). Bioorg. Med. Chem. Lett. 20, 4922–4926. Web of Science CrossRef CAS PubMed Google Scholar
Coles, S. J. & Gale, P. A. (2012). Chem. Sci. 3, 683–689. Web of Science CSD CrossRef CAS Google Scholar
Evans, P. (2006). Acta Cryst. D62, 72–82. Web of Science CrossRef CAS IUCr Journals Google Scholar
Gomes, L. R., Low, J. N., Fonseca, A., Matos, M. J. & Borges, F. (2016). Acta Cryst. E72, 926–932. Web of Science CSD CrossRef IUCr Journals Google Scholar
Groom, C. R., Bruno, I. J., Lightfoot, M. P. & Ward, S. C. (2016). Acta Cryst. B72, 171–179. Web of Science CSD CrossRef IUCr Journals Google Scholar
Hübschle, C. B., Sheldrick, G. M. & Dittrich, B. (2011). J. Appl. Cryst. 44, 1281–1284. Web of Science CrossRef IUCr Journals Google Scholar
Macrae, C. F., Edgington, P. R., McCabe, P., Pidcock, E., Shields, G. P., Taylor, R., Towler, M. & van de Streek, J. (2006). J. Appl. Cryst. 39, 453–457. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Matos, M. J., Janeiro, P., Gonz\'alez Franco, R. M., Vilar, S., Tatonetti, N. P., Santana, L., Uriarte, E., Borges, F., Fontenla, J. A. & Viña, D. (2014). Future Med. Chem. 6, 371–383. Google Scholar
Matos, M. J., Viña, D., Quezada, E., Picciau, C., Delogu, G., Orallo, F., Santana, L. & Uriarte, E. (2009). Bioorg. Med. Chem. Lett. 19, 3268–3270. Web of Science CrossRef PubMed CAS Google Scholar
Murata, C., Masuda, T., Kamochi, Y., Todoroki, K., Yoshida, H., Nohta, H., Yamaguchi, M. & Takadate, A. (2005). Chem. Pharm. Bull. (Tokyo), 53, 750–758. Web of Science CrossRef PubMed CAS Google Scholar
Rohl, A. L., Moret, M., Kaminsky, W., Claborn, K., McKinnon, J. J. & Kahr, B. (2008). Cryst. Growth Des. 8, 451–4525. Web of Science CSD CrossRef Google Scholar
Sheldrick, G. M. (2015a). Acta Cryst. A71, 3–8. Web of Science CrossRef IUCr Journals Google Scholar
Sheldrick, G. M. (2015b). Acta Cryst. C71, 3–8. Web of Science CrossRef IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
Sridharan, V., Suryavanshi, P. & Menéndez, J. C. (2011). Chem. Rev. 111, 7157–7259. Web of Science CrossRef CAS PubMed Google Scholar
Vazquez-Rodriguez, S., Matos, M. J., Santana, L., Uriarte, E., Borges, F., Kachler, S. & Klotz, K. N. (2013). J. Pharm. Pharmacol. 65, 607–703. Google Scholar
Winter, G. (2010). J. Appl. Cryst. 43, 186–190. Web of Science CrossRef CAS IUCr Journals Google Scholar
Wolff, S. K., Grimwood, D. J., McKinnon, J. J., Turner, M. J., Jayatilaka, D. & Spackman, M. A. (2012). Crystal Explorer. The University of Western Australia. Google Scholar

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 72| Part 8| August 2016| Pages 1121-1125

https://doi.org/10.1107/S2056989016011026

Open

access

Format		BIBTeX
		EndNote
		RefMan
		Refer
		Medline
		CIF
		SGML
		Plain Text

Format		BIBTeX
		EndNote
		RefMan
		Refer
		Medline
		CIF
		SGML
		Plain Text

Search IUCr Journals		doi		Advanced search
Author		volume	page

research communications\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

6-Methyl-2-oxo-N-(quinolin-6-yl)-2H-chromene-3-carboxamide: crystal structure and Hirshfeld surface analysis

1. Chemical context

2. Structural commentary

3. Supra­molecular features

4. Hirshfeld surface analyses

5. Database survey

6. Synthesis and crystallization

7. Refinement

Supporting information

Acknowledgements

References

research communications

3. Supramolecular features