organic compounds
2-Oxo-2H-chromen-4-yl propionate
aLaboratoire de Cristallographie et Physique Moléculaire, UFR SSMT, Université Félix Houphouët Boigny, 22 BP 582 Abidjan 22, Côte d'Ivoire, bLaboratoire de Chimie Bio-organique et Phytochimie, Université de Ouagadougou 03 BP 7021 Ouagadougou 03, Burkina Faso, and cLaboratoire de Physique des Interactions Ioniques et Moléculaire, UMR–CNRS 7345, Equipe "Spectrometrie et Dynamique Moléculaire", Centre Saint Jérôme, Université Aix-Marseille, Case 542 Avenue Escadrille Normandie Niemen F-13397, Marseille Cedex 20, France
*Correspondence e-mail: bibilamayayabisseyou@yahoo.fr
In the title compound, C12H10O4, the atoms of the 2-oxo-2H-chromene ring system and the non-H atoms of the 4-substituent all lie on a crystallographic mirror plane. The molecular structure exhibits an intramolecular C—H⋯O hydrogen bond, which generates an S(6) ring. In the crystal, molecules form R32(12) trimeric units via C—H⋯O interactions which propagate into layers parallel to the ac plane. These layers are linked by weak C—H⋯O interactions along the [010] direction, generating a three-dimensional network.
Related literature
For the biological activity of coumarin derivatives, see: Abernethy (1969); Wang et al. (2001); Yu et al. (2003, 2007); Vukovic et al. (2010). For industrial applications, see: O'Kennedy & Thornes (1997); Lakshmi et al. (1995). For a related structure, see: Abou et al. (2012). For hydrogen-bond motifs, see: Bernstein et al. (1995). For thermal motion of carbonyl group oxygen atoms, see: Braga & Koetzle (1988).
Experimental
Crystal data
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Data collection: COLLECT (Hooft, 1998); cell DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: publCIF (Westrip, 2010) and WinGX (Farrugia, 2012).
Supporting information
https://doi.org/10.1107/S1600536813016358/zq2203sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813016358/zq2203Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813016358/zq2203Isup3.cml
To a solution of propionic chloride (125 mmol) in dried diethyl ether (300 ml) was added dried pyridine (4 ml) and 4-hydroxycoumarin (120 mmol) in small portions over 30 min. The mixture was then refluxed for 3 h and poured in 300 ml of chloroform. The solution was acidified with dilute hydrochloric acid until the pH was 2–3. The organic layer was extracted, washed with water, dried over MgSO4 and the solvent removed. The crude product was recrystallized from acetone. Colourless single crystals of the title compound were obtained in a good yield: 69.7%; m.p. 358–359 K.
The structure solution program SIR2004 (Burla et al., 2005) was used to solve the structure. The .res file shows that all non H atoms lie on special positions (x, 1/4, z) with a site-occupancy factor of 0.5. As the program SHEIXL97 (Sheldrick, 2008) will automatically work out and apply the appropriate positional, s.o.f. and Uij constraints for any special positions, we have not refined these non H atoms parameters with further constraints. However, omitted from the
because of bad disagreements were (7 0 4), (7 2 4), (4 1 1), (1 0 1), (0 0 2).H atoms were placed in calculated positions [C—H = 0.93 (aromatic), 0.96 (methyl group) or 0.97 Å (methylene group)] and refined using a riding model approximation with Uiso(H) constrained to 1.2 (aromatic and methylene group) or 1.5 (methyl group) times Ueq of the respective parent atom.
The 2-Oxo-2H-chromene ring system derivatives commonly called coumarin derivatives attracted significant attention because of their interesting biological profile including anti-HIV (Yu et al., 2003; Yu et al., 2007), anti-coagulant (Abernethy, 1969), anti-oxidant (Vukovic et al., 2010), anti-tumor (Wang et al., 2001) properties.
They found applications in cosmetic and food industries (O'Kennedy & Thornes, 1997) and are also potential laser dyes (Lakshmi et al., 1995). Owing its versatile properties, coumarin ring system has become a hub nucleus in the developing of new molecules in organic, medicinal and material chemistry. We have synthesized novel coumarin derivatives substituted at position 4 in order to explore the new properties of this compound class. Herein, we report single-crystal structure of title compound.
The molecular structure of title compound (and its atomic numbering scheme) is illustrated in Fig. 1. As expected, the coumarin moiety is planar as shown in the recent X-ray π-electron cloud in this one. In this structure, except the H atoms of the substituent groups, all other atoms lie in a crystallographic mirror plane (x, y = 1/4, z). We also note the existence of an intramolecular C—H···O hydrogen bond which generates a S(6) ring motif (Bernstein et al., 1995).
of 4-substituted coumarin derivative (Abou et al., 2012). Analysis of bond length values of aromatic ring indicate the existence of a delocalizedIn the three-dimensional crystal packing, molecules form cyclic trimers of R32 (12) motifs (Bernstein et al., 1995) via two independent intermolecular C—H···O hydrogen bond interactions along the a axis (Fig. 2). These trimolecular aggregates propagate into parallel layers to the ac plane (Fig. 3). These layers are additionally stabilized by weak intermolecular C—H···O interactions along [010] direction.
For a biological profile of coumarin derivatives, see: Abernethy (1969); Wang et al. (2001); Yu et al. (2003, 2007); Vukovic et al. (2010). For industrial applications, see: O'Kennedy & Thornes (1997); Lakshmi et al. (1995). For a related structure, see: Abou et al. (2012). For hydrogen-bond motifs, see: Bernstein et al. (1995). For thermal motion of carbonyl group oxygen atoms, see: Braga & Koetzle (1988).
Data collection: COLLECT (Hooft, 1998); cell
DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: publCIF (Westrip, 2010) and WinGX (Farrugia, 2012).C12H10O4 | Dx = 1.385 Mg m−3 |
Mr = 218.20 | Melting point = 358–359 K |
Orthorhombic, Pnma | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2n | Cell parameters from 8092 reflections |
a = 9.2834 (3) Å | θ = 3.3–29.0° |
b = 6.7081 (2) Å | µ = 0.11 mm−1 |
c = 16.8068 (6) Å | T = 298 K |
V = 1046.63 (6) Å3 | Parallelepiped, colourless |
Z = 4 | 0.40 × 0.40 × 0.20 mm |
F(000) = 456 |
Nonius KappaCCD diffractometer | 1155 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.037 |
Graphite monochromator | θmax = 29.0°, θmin = 3.3° |
φ and ω scans | h = −12→12 |
8092 measured reflections | k = −8→8 |
1431 independent reflections | l = −22→22 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.056 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.146 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0589P)2 + 0.3235P] where P = (Fo2 + 2Fc2)/3 |
1431 reflections | (Δ/σ)max < 0.001 |
98 parameters | Δρmax = 0.24 e Å−3 |
0 restraints | Δρmin = −0.16 e Å−3 |
88 constraints |
C12H10O4 | V = 1046.63 (6) Å3 |
Mr = 218.20 | Z = 4 |
Orthorhombic, Pnma | Mo Kα radiation |
a = 9.2834 (3) Å | µ = 0.11 mm−1 |
b = 6.7081 (2) Å | T = 298 K |
c = 16.8068 (6) Å | 0.40 × 0.40 × 0.20 mm |
Nonius KappaCCD diffractometer | 1155 reflections with I > 2σ(I) |
8092 measured reflections | Rint = 0.037 |
1431 independent reflections |
R[F2 > 2σ(F2)] = 0.056 | 0 restraints |
wR(F2) = 0.146 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.24 e Å−3 |
1431 reflections | Δρmin = −0.16 e Å−3 |
98 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > 2σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. The DENZO image processing package used during process data may have problems with certain strong reflections. These reflections are often excluded from the data set to result in _diffrn_measured_fraction_theta_full Low (0.974 in our nvestigation study). However, it presents no problem in the refinement since the data-to-parameter ratio is superior to 10. In the initial refinement, extinction correction (EXTI) has been applied because SHELXL has suggested it; but in the last cycles of the refinement, the EXTI instruction has been removed because of PLATON checkCIF reports mentioning extinction parameter within range (2.20 σ). The non H atoms lie in the miror plane at y = 1/4. Therefore the Uij constraints (U12 = U23 = 0) generated automatically by SHELXL for this special positions (x, 1/4, z) in the space group Pnma is responsible for the elongated thermal ellipsoids in the [010] direction causing a large U3/U1 ratio for the average U(i,j) tensor (2.4). The low Ueq as compared to neighbors for atom C10 may be caused by the carbonyl bond in which the oxygen atom vibrates more than the carbon atom (Braga & Koetzle, 1988). Moreover, the decrease of Ueq from C12 to C10 of the propanoate substituent originates from the minor unresolved disordered H atoms bonded to the non disordered carbon atom C12 (split H atoms) revealed by manual inspection of PLATON (Spek, 2009) may partly justify this low Ueq of C10. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O3 | 0.06438 (15) | 0.2500 | 0.59531 (8) | 0.0595 (5) | |
O1 | −0.01804 (18) | 0.2500 | 0.35401 (8) | 0.0607 (5) | |
C4 | 0.1469 (2) | 0.2500 | 0.46462 (11) | 0.0434 (4) | |
C3 | 0.0233 (2) | 0.2500 | 0.51696 (10) | 0.0428 (4) | |
C2 | −0.1113 (2) | 0.2500 | 0.48839 (12) | 0.0481 (5) | |
H2 | −0.1890 | 0.2500 | 0.5233 | 0.058* | |
C10 | −0.0290 (2) | 0.2500 | 0.65979 (11) | 0.0460 (5) | |
C5 | 0.1204 (2) | 0.2500 | 0.38352 (12) | 0.0461 (5) | |
O4 | −0.15508 (17) | 0.2500 | 0.65323 (9) | 0.0695 (5) | |
C11 | 0.0580 (2) | 0.2500 | 0.73405 (11) | 0.0616 (7) | |
H11A | 0.1197 | 0.3668 | 0.7343 | 0.074* | 0.50 |
H11B | 0.1197 | 0.1332 | 0.7343 | 0.074* | 0.50 |
C9 | 0.2892 (2) | 0.2500 | 0.49029 (13) | 0.0633 (7) | |
H9 | 0.3096 | 0.2500 | 0.5445 | 0.076* | |
O2 | −0.25262 (19) | 0.2500 | 0.37225 (11) | 0.0921 (8) | |
C1 | −0.1362 (2) | 0.2500 | 0.40383 (13) | 0.0579 (6) | |
C8 | 0.4004 (3) | 0.2500 | 0.43576 (16) | 0.0765 (9) | |
H8 | 0.4954 | 0.2500 | 0.4532 | 0.092* | |
C12 | −0.0325 (3) | 0.2500 | 0.80905 (13) | 0.0723 (8) | |
H12A | −0.0996 | 0.1412 | 0.8072 | 0.108* | 0.50 |
H12B | −0.0842 | 0.3735 | 0.8129 | 0.108* | 0.50 |
H12C | 0.0290 | 0.2352 | 0.8546 | 0.108* | 0.50 |
C6 | 0.2310 (3) | 0.2500 | 0.32839 (13) | 0.0603 (6) | |
H6 | 0.2111 | 0.2500 | 0.2742 | 0.072* | |
C7 | 0.3703 (3) | 0.2500 | 0.35516 (15) | 0.0687 (7) | |
H7 | 0.4457 | 0.2500 | 0.3187 | 0.082* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O3 | 0.0399 (8) | 0.1082 (14) | 0.0304 (7) | 0.000 | 0.0025 (5) | 0.000 |
O1 | 0.0549 (9) | 0.0936 (12) | 0.0336 (7) | 0.000 | −0.0011 (6) | 0.000 |
C4 | 0.0423 (10) | 0.0528 (11) | 0.0351 (9) | 0.000 | 0.0050 (7) | 0.000 |
C3 | 0.0420 (10) | 0.0554 (11) | 0.0311 (8) | 0.000 | 0.0007 (7) | 0.000 |
C2 | 0.0401 (10) | 0.0665 (13) | 0.0376 (9) | 0.000 | 0.0013 (7) | 0.000 |
C10 | 0.0409 (10) | 0.0616 (12) | 0.0354 (9) | 0.000 | 0.0062 (7) | 0.000 |
C5 | 0.0485 (11) | 0.0532 (11) | 0.0368 (9) | 0.000 | 0.0036 (8) | 0.000 |
O4 | 0.0419 (8) | 0.1227 (16) | 0.0439 (8) | 0.000 | 0.0053 (6) | 0.000 |
C11 | 0.0468 (12) | 0.1050 (19) | 0.0331 (10) | 0.000 | 0.0013 (8) | 0.000 |
C9 | 0.0432 (11) | 0.104 (2) | 0.0432 (10) | 0.000 | 0.0039 (9) | 0.000 |
O2 | 0.0540 (10) | 0.173 (2) | 0.0496 (9) | 0.000 | −0.0147 (8) | 0.000 |
C1 | 0.0493 (12) | 0.0841 (16) | 0.0402 (10) | 0.000 | −0.0031 (9) | 0.000 |
C8 | 0.0440 (12) | 0.126 (3) | 0.0589 (15) | 0.000 | 0.0111 (10) | 0.000 |
C12 | 0.0577 (14) | 0.123 (2) | 0.0363 (10) | 0.000 | 0.0053 (9) | 0.000 |
C6 | 0.0654 (14) | 0.0757 (16) | 0.0397 (10) | 0.000 | 0.0133 (10) | 0.000 |
C7 | 0.0603 (14) | 0.0908 (18) | 0.0550 (13) | 0.000 | 0.0232 (11) | 0.000 |
O3—C3 | 1.371 (2) | C11—H11A | 0.9700 |
O3—C10 | 1.388 (2) | C11—H11B | 0.9700 |
O1—C5 | 1.378 (3) | C9—C8 | 1.380 (3) |
O1—C1 | 1.380 (3) | C9—H9 | 0.9300 |
C4—C5 | 1.385 (3) | O2—C1 | 1.204 (3) |
C4—C9 | 1.390 (3) | C8—C7 | 1.383 (4) |
C4—C3 | 1.446 (3) | C8—H8 | 0.9300 |
C3—C2 | 1.339 (3) | C12—H12A | 0.9600 |
C2—C1 | 1.440 (3) | C12—H12B | 0.9600 |
C2—H2 | 0.9300 | C12—H12C | 0.9600 |
C10—O4 | 1.176 (3) | C6—C7 | 1.370 (4) |
C10—C11 | 1.487 (3) | C6—H6 | 0.9300 |
C5—C6 | 1.383 (3) | C7—H7 | 0.9300 |
C11—C12 | 1.515 (3) | ||
C3—O3—C10 | 125.20 (15) | C12—C11—H11A | 108.9 |
C5—O1—C1 | 121.52 (16) | C10—C11—H11B | 108.9 |
C5—C4—C9 | 118.32 (18) | C12—C11—H11B | 108.9 |
C5—C4—C3 | 117.24 (17) | H11A—C11—H11B | 107.7 |
C9—C4—C3 | 124.44 (18) | C8—C9—C4 | 120.3 (2) |
C2—C3—O3 | 127.17 (17) | C8—C9—H9 | 119.9 |
C2—C3—C4 | 121.50 (17) | C4—C9—H9 | 119.9 |
O3—C3—C4 | 111.33 (16) | O2—C1—O1 | 116.48 (19) |
C3—C2—C1 | 120.26 (18) | O2—C1—C2 | 125.4 (2) |
C3—C2—H2 | 119.9 | O1—C1—C2 | 118.13 (18) |
C1—C2—H2 | 119.9 | C9—C8—C7 | 120.0 (2) |
O4—C10—O3 | 123.27 (18) | C9—C8—H8 | 120.0 |
O4—C10—C11 | 128.30 (18) | C7—C8—H8 | 120.0 |
O3—C10—C11 | 108.43 (16) | C7—C6—C5 | 118.8 (2) |
O1—C5—C6 | 116.82 (19) | C7—C6—H6 | 120.6 |
O1—C5—C4 | 121.34 (18) | C5—C6—H6 | 120.6 |
C6—C5—C4 | 121.8 (2) | C6—C7—C8 | 120.8 (2) |
C10—C11—C12 | 113.39 (19) | C6—C7—H7 | 119.6 |
C10—C11—H11A | 108.9 | C8—C7—H7 | 119.6 |
C10—O3—C3—C2 | 0.0 | C3—C4—C5—C6 | 180.0 |
C10—O3—C3—C4 | 180.0 | O4—C10—C11—C12 | 0.0 |
C5—C4—C3—C2 | 0.0 | O3—C10—C11—C12 | 180.0 |
C9—C4—C3—C2 | 180.0 | C5—C4—C9—C8 | 0.0 |
C5—C4—C3—O3 | 180.0 | C3—C4—C9—C8 | 180.0 |
C9—C4—C3—O3 | 0.0 | C5—O1—C1—O2 | 180.0 |
O3—C3—C2—C1 | 180.0 | C5—O1—C1—C2 | 0.0 |
C4—C3—C2—C1 | 0.0 | C3—C2—C1—O2 | 180.0 |
C3—O3—C10—O4 | 0.0 | C3—C2—C1—O1 | 0.0 |
C3—O3—C10—C11 | 180.0 | C4—C9—C8—C7 | 0.0 |
C1—O1—C5—C6 | 180.0 | O1—C5—C6—C7 | 180.0 |
C1—O1—C5—C4 | 0.0 | C4—C5—C6—C7 | 0.0 |
C9—C4—C5—O1 | 180.0 | C5—C6—C7—C8 | 0.0 |
C3—C4—C5—O1 | 0.0 | C9—C8—C7—C6 | 0.0 |
C9—C4—C5—C6 | 0.0 |
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···O4 | 0.93 | 2.21 | 2.800 (3) | 121 |
C6—H6···O2i | 0.93 | 2.48 | 3.376 (3) | 161 |
C8—H8···O2ii | 0.93 | 2.71 | 3.394 (3) | 131 |
Symmetry codes: (i) x+1/2, y, −z+1/2; (ii) x+1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C12H10O4 |
Mr | 218.20 |
Crystal system, space group | Orthorhombic, Pnma |
Temperature (K) | 298 |
a, b, c (Å) | 9.2834 (3), 6.7081 (2), 16.8068 (6) |
V (Å3) | 1046.63 (6) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.40 × 0.40 × 0.20 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8092, 1431, 1155 |
Rint | 0.037 |
(sin θ/λ)max (Å−1) | 0.681 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.056, 0.146, 1.06 |
No. of reflections | 1431 |
No. of parameters | 98 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.24, −0.16 |
Computer programs: COLLECT (Hooft, 1998), DENZO/SCALEPACK (Otwinowski & Minor, 1997), SIR2004 (Burla et al., 2005), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009), publCIF (Westrip, 2010) and WinGX (Farrugia, 2012).
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···O4 | 0.93 | 2.21 | 2.800 (3) | 120.9 |
C6—H6···O2i | 0.93 | 2.48 | 3.376 (3) | 160.8 |
C8—H8···O2ii | 0.93 | 2.71 | 3.394 (3) | 131.4 |
Symmetry codes: (i) x+1/2, y, −z+1/2; (ii) x+1, y, z. |
Acknowledgements
The authors thank the Laboratoire de Physique des Interactions Ioniques et Moléculaires and the Spectropôle of Aix-Marseille Université (France) for the use of their diffractometer.
References
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The 2-Oxo-2H-chromene ring system derivatives commonly called coumarin derivatives attracted significant attention because of their interesting biological profile including anti-HIV (Yu et al., 2003; Yu et al., 2007), anti-coagulant (Abernethy, 1969), anti-oxidant (Vukovic et al., 2010), anti-tumor (Wang et al., 2001) properties.
They found applications in cosmetic and food industries (O'Kennedy & Thornes, 1997) and are also potential laser dyes (Lakshmi et al., 1995). Owing its versatile properties, coumarin ring system has become a hub nucleus in the developing of new molecules in organic, medicinal and material chemistry. We have synthesized novel coumarin derivatives substituted at position 4 in order to explore the new properties of this compound class. Herein, we report single-crystal structure of title compound.
The molecular structure of title compound (and its atomic numbering scheme) is illustrated in Fig. 1. As expected, the coumarin moiety is planar as shown in the recent X-ray diffraction analysis of 4-substituted coumarin derivative (Abou et al., 2012). Analysis of bond length values of aromatic ring indicate the existence of a delocalized π-electron cloud in this one. In this structure, except the H atoms of the substituent groups, all other atoms lie in a crystallographic mirror plane (x, y = 1/4, z). We also note the existence of an intramolecular C—H···O hydrogen bond which generates a S(6) ring motif (Bernstein et al., 1995).
In the three-dimensional crystal packing, molecules form cyclic trimers of R32 (12) motifs (Bernstein et al., 1995) via two independent intermolecular C—H···O hydrogen bond interactions along the a axis (Fig. 2). These trimolecular aggregates propagate into parallel layers to the ac plane (Fig. 3). These layers are additionally stabilized by weak intermolecular C—H···O interactions along [010] direction.