organic compounds
Ethyl 4-(4-hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate monohydrate
aDepartment of Chemistry, Tianjin University, Tianjin 300072, People's Republic of China
*Correspondence e-mail: mjzhangtju@163.com
In the organic molecule of the title compound, C14H16N2O3S·H2O, the two rings are oriented at a dihedral angle of 84.31 (2)°. In the intramolecular O—H⋯O and intermolecular O—H⋯O, N—H⋯O, O—H⋯S and N—H⋯S hydrogen bonds are found.
Related literature
For general background, see: Atwal et al. (1991); Mayer et al. (1999). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
|
Refinement
|
Data collection: SMART (Bruker, 1997); cell SAINT (Bruker, 1997); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1997); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536807065737/hk2363sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536807065737/hk2363Isup2.hkl
For the preparation of the title compound, a solution of ethyl acetoacetate (1.44 g, 10 mmol), 4-hydroxybenzaldehyde (1.38 g, 10 mmol) and thiourea (0.86 g, 10 mmol) in ethanol (5 ml) was heated under reflux in the presence of HCl (three drops) for 2.5 h. After being cooled to room temperature, the reaction mixture was poured onto crushed ice (30 g) and stirred for 5–10 min. The separated solid was filtered under suction (water aspirator), washed with ice-cold water (50 ml), and then recrystallized from hot ethanol to afford the pure product.
H atoms (for H2O and NH) were located in difference synthesis and refined isotropicaly [O—H = 0.864 (10) and 0.855 (10) Å, Uiso(H) = 0.088 (13) and 0.096 (14) Å2; N—H = 0.895 (10) and 0.892 (10) Å, Uiso(H) = 0.047 (8) and 0.061 (9) Å2]. The remaining H atoms were positioned geometrically, with O—H = 0.82 Å (for OH) and C—H = 0.93, 0.98, 0.97 and 0.96 Å, for aromatic, methine, methylene and methyl H atoms and constrained to ride on their parent atoms, with Uiso(H) = xUeq(C,O), where x = 1.5 for OH H and methyl H, and x = 1.2 for all other H atoms.
The title compound, (I), is a kind of polyfunctionalized dihydropyrimidines (DHPMs), which represents a heterocyclic system of remarkable pharmacological efficiency and may exhibit antiviral, antitumor, antibacterial, and anti inflammatory properties (Atwal et al., 1991). It is the only cell-permeable molecule currently known to specifically inhibit mitotic kinesis Eg5 and is considered a lead for the development of new anticancer drugs (Mayer et al., 1999).
In the molecule of the title compound, (I), (Fig.1) the bond lengths and angles are within normal ranges (Allen et al., 1987). Rings A (N1/N2/C1—C4) and B (C9—C14) are, of course, planar and they are oriented at a dihedral angle of A/B = 84.31 (2)°.
In the
intramolecular O—H···O and intermolecular O—H···O, N—H···O, O—H···S and N—H···S hydrogen bonds (Table 1) link the molecules (Fig. 2), in which they seem to be effective in the stabilization of the structure.For general background, see: Atwal et al. (1991); Mayer et al. (1999). For bond-length data, see: Allen et al. (1987).
Data collection: SMART (Bruker, 1997); cell
SAINT (Bruker, 1997); data reduction: SAINT (Bruker, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1997); software used to prepare material for publication: SHELXTL (Bruker, 1997).Fig. 1. The molecular structure of the title molecule, with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. Hydrogen bond is shown as dashed lines. | |
Fig. 2. A packing diagram of (I). Hydrogen bonds are shown as dashed lines. |
C14H16N2O3S·H2O | Z = 2 |
Mr = 310.36 | F(000) = 328 |
Triclinic, P1 | Dx = 1.362 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 5.6702 (17) Å | Cell parameters from 1137 reflections |
b = 11.212 (3) Å | θ = 3.3–25.0° |
c = 12.343 (4) Å | µ = 0.23 mm−1 |
α = 90.406 (5)° | T = 294 K |
β = 95.251 (5)° | Plate, colorless |
γ = 104.393 (5)° | 0.22 × 0.16 × 0.16 mm |
V = 756.5 (4) Å3 |
Bruker SMART CCD area-detector diffractometer | 2655 independent reflections |
Radiation source: fine-focus sealed tube | 1741 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.025 |
φ and ω scans | θmax = 25.0°, θmin = 2.5° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −6→6 |
Tmin = 0.951, Tmax = 0.964 | k = −10→13 |
3958 measured reflections | l = −14→14 |
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)] = 0.044 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.117 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0529P)2 + 0.1375P] where P = (Fo2 + 2Fc2)/3 |
2655 reflections | (Δ/σ)max = 0.003 |
209 parameters | Δρmax = 0.20 e Å−3 |
5 restraints | Δρmin = −0.21 e Å−3 |
C14H16N2O3S·H2O | γ = 104.393 (5)° |
Mr = 310.36 | V = 756.5 (4) Å3 |
Triclinic, P1 | Z = 2 |
a = 5.6702 (17) Å | Mo Kα radiation |
b = 11.212 (3) Å | µ = 0.23 mm−1 |
c = 12.343 (4) Å | T = 294 K |
α = 90.406 (5)° | 0.22 × 0.16 × 0.16 mm |
β = 95.251 (5)° |
Bruker SMART CCD area-detector diffractometer | 2655 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1741 reflections with I > 2σ(I) |
Tmin = 0.951, Tmax = 0.964 | Rint = 0.025 |
3958 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | 5 restraints |
wR(F2) = 0.117 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | Δρmax = 0.20 e Å−3 |
2655 reflections | Δρmin = −0.21 e Å−3 |
209 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'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 > σ(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. |
x | y | z | Uiso*/Ueq | ||
S1 | 0.30417 (14) | 0.38411 (6) | 0.11066 (6) | 0.0509 (3) | |
O1 | 0.1221 (4) | 0.95058 (17) | 0.15444 (17) | 0.0588 (6) | |
O2 | −0.2131 (3) | 0.83224 (15) | 0.21777 (15) | 0.0464 (5) | |
O3 | 0.1542 (4) | 0.70709 (18) | 0.67773 (14) | 0.0520 (5) | |
H3 | 0.2977 | 0.7438 | 0.6934 | 0.078* | |
O4 | 0.6317 (5) | 0.8288 (2) | 0.72788 (18) | 0.0688 (7) | |
H4A | 0.700 (6) | 0.7722 (19) | 0.753 (3) | 0.088 (13)* | |
H4B | 0.681 (6) | 0.8966 (17) | 0.765 (2) | 0.096 (14)* | |
N1 | 0.2842 (4) | 0.61232 (19) | 0.06966 (18) | 0.0417 (6) | |
H1A | 0.385 (4) | 0.602 (2) | 0.0205 (16) | 0.047 (8)* | |
N2 | 0.0298 (4) | 0.51470 (18) | 0.19204 (17) | 0.0376 (5) | |
H2A | −0.020 (5) | 0.4483 (17) | 0.231 (2) | 0.061 (9)* | |
C1 | 0.1972 (5) | 0.5103 (2) | 0.12598 (19) | 0.0343 (6) | |
C2 | −0.0549 (5) | 0.6237 (2) | 0.2218 (2) | 0.0351 (6) | |
H2 | −0.2327 | 0.6050 | 0.2044 | 0.042* | |
C3 | 0.0627 (4) | 0.7321 (2) | 0.1543 (2) | 0.0334 (6) | |
C4 | 0.2179 (5) | 0.7224 (2) | 0.0817 (2) | 0.0378 (6) | |
C5 | 0.3300 (6) | 0.8169 (2) | 0.0035 (2) | 0.0521 (8) | |
H5A | 0.2437 | 0.8805 | −0.0010 | 0.078* | |
H5B | 0.3197 | 0.7784 | −0.0671 | 0.078* | |
H5C | 0.4986 | 0.8521 | 0.0286 | 0.078* | |
C6 | −0.0012 (5) | 0.8494 (2) | 0.1737 (2) | 0.0401 (6) | |
C7 | −0.2762 (6) | 0.9417 (2) | 0.2582 (3) | 0.0563 (8) | |
H7A | −0.4527 | 0.9281 | 0.2532 | 0.068* | |
H7B | −0.2115 | 1.0112 | 0.2139 | 0.068* | |
C8 | −0.1728 (7) | 0.9697 (3) | 0.3736 (3) | 0.0710 (10) | |
H8A | −0.2140 | 0.8963 | 0.4147 | 0.106* | |
H8B | −0.2398 | 1.0318 | 0.4038 | 0.106* | |
H8C | 0.0018 | 0.9990 | 0.3766 | 0.106* | |
C9 | 0.0011 (4) | 0.6489 (2) | 0.34304 (19) | 0.0319 (6) | |
C10 | 0.2363 (5) | 0.7051 (2) | 0.3872 (2) | 0.0388 (6) | |
H10 | 0.3597 | 0.7294 | 0.3413 | 0.047* | |
C11 | 0.2911 (5) | 0.7258 (2) | 0.4978 (2) | 0.0410 (6) | |
H11 | 0.4501 | 0.7639 | 0.5259 | 0.049* | |
C12 | 0.1096 (5) | 0.6899 (2) | 0.5672 (2) | 0.0371 (6) | |
C13 | −0.1259 (5) | 0.6333 (2) | 0.5247 (2) | 0.0428 (7) | |
H13 | −0.2488 | 0.6088 | 0.5708 | 0.051* | |
C14 | −0.1787 (5) | 0.6130 (2) | 0.4140 (2) | 0.0392 (6) | |
H14 | −0.3377 | 0.5747 | 0.3862 | 0.047* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0668 (5) | 0.0371 (4) | 0.0559 (5) | 0.0198 (4) | 0.0232 (4) | 0.0093 (3) |
O1 | 0.0698 (14) | 0.0296 (11) | 0.0781 (15) | 0.0097 (10) | 0.0198 (12) | 0.0033 (10) |
O2 | 0.0440 (11) | 0.0348 (10) | 0.0620 (13) | 0.0132 (9) | 0.0048 (10) | −0.0021 (9) |
O3 | 0.0695 (14) | 0.0479 (12) | 0.0334 (11) | 0.0024 (11) | 0.0112 (9) | 0.0031 (8) |
O4 | 0.0863 (18) | 0.0457 (14) | 0.0663 (16) | 0.0087 (14) | −0.0142 (12) | 0.0029 (12) |
N1 | 0.0536 (15) | 0.0357 (13) | 0.0396 (14) | 0.0141 (11) | 0.0160 (12) | 0.0062 (10) |
N2 | 0.0493 (14) | 0.0279 (12) | 0.0361 (13) | 0.0082 (11) | 0.0112 (11) | 0.0007 (10) |
C1 | 0.0404 (15) | 0.0317 (14) | 0.0288 (14) | 0.0062 (12) | 0.0006 (12) | −0.0015 (11) |
C2 | 0.0342 (14) | 0.0324 (14) | 0.0376 (15) | 0.0064 (12) | 0.0038 (11) | 0.0005 (11) |
C3 | 0.0369 (15) | 0.0274 (13) | 0.0339 (14) | 0.0062 (11) | −0.0022 (12) | −0.0007 (10) |
C4 | 0.0474 (17) | 0.0305 (14) | 0.0332 (15) | 0.0077 (12) | −0.0014 (12) | 0.0015 (11) |
C5 | 0.073 (2) | 0.0400 (16) | 0.0440 (17) | 0.0119 (15) | 0.0150 (15) | 0.0102 (13) |
C6 | 0.0445 (17) | 0.0357 (16) | 0.0386 (16) | 0.0103 (13) | −0.0045 (13) | 0.0004 (12) |
C7 | 0.058 (2) | 0.0427 (17) | 0.075 (2) | 0.0245 (15) | 0.0114 (16) | 0.0012 (15) |
C8 | 0.090 (3) | 0.052 (2) | 0.072 (2) | 0.0149 (19) | 0.019 (2) | −0.0077 (16) |
C9 | 0.0351 (15) | 0.0277 (13) | 0.0350 (14) | 0.0106 (11) | 0.0067 (11) | 0.0014 (10) |
C10 | 0.0349 (15) | 0.0436 (16) | 0.0366 (15) | 0.0048 (13) | 0.0110 (12) | 0.0047 (12) |
C11 | 0.0376 (15) | 0.0446 (16) | 0.0358 (16) | 0.0010 (13) | 0.0032 (12) | 0.0015 (12) |
C12 | 0.0518 (18) | 0.0289 (14) | 0.0321 (15) | 0.0098 (13) | 0.0115 (13) | 0.0038 (11) |
C13 | 0.0444 (17) | 0.0397 (15) | 0.0460 (17) | 0.0082 (13) | 0.0206 (13) | 0.0061 (12) |
C14 | 0.0323 (15) | 0.0397 (15) | 0.0451 (17) | 0.0069 (12) | 0.0076 (12) | −0.0018 (12) |
S1—C1 | 1.688 (2) | C5—H5A | 0.9600 |
O1—C6 | 1.213 (3) | C5—H5B | 0.9600 |
O2—C6 | 1.335 (3) | C5—H5C | 0.9600 |
O2—C7 | 1.458 (3) | C7—C8 | 1.489 (4) |
O3—C12 | 1.368 (3) | C7—H7A | 0.9700 |
O3—H3 | 0.8200 | C7—H7B | 0.9700 |
O4—H4A | 0.87 (3) | C8—H8A | 0.9600 |
O4—H4B | 0.855 (10) | C8—H8B | 0.9600 |
N1—C1 | 1.353 (3) | C8—H8C | 0.9600 |
N1—C4 | 1.387 (3) | C9—C10 | 1.385 (3) |
N1—H1A | 0.895 (10) | C9—C14 | 1.390 (3) |
N2—C1 | 1.316 (3) | C10—C11 | 1.377 (3) |
N2—C2 | 1.476 (3) | C10—H10 | 0.9300 |
N2—H2A | 0.892 (10) | C11—C12 | 1.384 (4) |
C2—C9 | 1.510 (3) | C11—H11 | 0.9300 |
C2—C3 | 1.526 (3) | C12—C13 | 1.381 (4) |
C2—H2 | 0.9800 | C13—C14 | 1.376 (4) |
C3—C4 | 1.333 (3) | C13—H13 | 0.9300 |
C3—C6 | 1.472 (3) | C14—H14 | 0.9300 |
C4—C5 | 1.500 (4) | ||
C6—O2—C7 | 117.0 (2) | O2—C7—C8 | 110.0 (2) |
C12—O3—H3 | 109.5 | O2—C7—H7A | 109.7 |
C1—N1—C4 | 124.1 (2) | C8—C7—H7A | 109.7 |
C1—N1—H1A | 114.2 (17) | O2—C7—H7B | 109.7 |
C4—N1—H1A | 121.6 (17) | C8—C7—H7B | 109.7 |
C1—N2—C2 | 127.1 (2) | H7A—C7—H7B | 108.2 |
C1—N2—H2A | 116.3 (18) | C7—C8—H8A | 109.5 |
C2—N2—H2A | 115.7 (18) | C7—C8—H8B | 109.5 |
N2—C1—N1 | 117.3 (2) | H8A—C8—H8B | 109.5 |
N2—C1—S1 | 122.54 (19) | C7—C8—H8C | 109.5 |
N1—C1—S1 | 120.1 (2) | H8A—C8—H8C | 109.5 |
N2—C2—C9 | 108.85 (18) | H8B—C8—H8C | 109.5 |
N2—C2—C3 | 109.3 (2) | C10—C9—C14 | 117.9 (2) |
C9—C2—C3 | 113.4 (2) | C10—C9—C2 | 120.7 (2) |
N2—C2—H2 | 108.4 | C14—C9—C2 | 121.4 (2) |
C9—C2—H2 | 108.4 | C11—C10—C9 | 121.3 (2) |
C3—C2—H2 | 108.4 | C11—C10—H10 | 119.3 |
C4—C3—C6 | 121.1 (2) | C9—C10—H10 | 119.3 |
C4—C3—C2 | 122.1 (2) | C10—C11—C12 | 120.0 (2) |
C6—C3—C2 | 116.7 (2) | C10—C11—H11 | 120.0 |
C3—C4—N1 | 119.6 (2) | C12—C11—H11 | 120.0 |
C3—C4—C5 | 127.9 (2) | O3—C12—C13 | 118.0 (2) |
N1—C4—C5 | 112.4 (2) | O3—C12—C11 | 122.5 (2) |
C4—C5—H5A | 109.5 | C13—C12—C11 | 119.5 (2) |
C4—C5—H5B | 109.5 | C14—C13—C12 | 120.0 (2) |
H5A—C5—H5B | 109.5 | C14—C13—H13 | 120.0 |
C4—C5—H5C | 109.5 | C12—C13—H13 | 120.0 |
H5A—C5—H5C | 109.5 | C13—C14—C9 | 121.3 (2) |
H5B—C5—H5C | 109.5 | C13—C14—H14 | 119.4 |
O1—C6—O2 | 122.9 (2) | C9—C14—H14 | 119.4 |
O1—C6—C3 | 125.3 (3) | H4A—O4—H4B | 112.8 (17) |
O2—C6—C3 | 111.7 (2) | ||
C2—N2—C1—N1 | −7.7 (4) | C2—C3—C6—O1 | 156.6 (2) |
C2—N2—C1—S1 | 171.99 (18) | C4—C3—C6—O2 | 158.4 (2) |
C4—N1—C1—N2 | 3.7 (4) | C2—C3—C6—O2 | −22.3 (3) |
C4—N1—C1—S1 | −176.06 (19) | C6—O2—C7—C8 | −88.3 (3) |
C1—N2—C2—C9 | −118.3 (3) | N2—C2—C9—C10 | 77.4 (3) |
C1—N2—C2—C3 | 6.0 (3) | C3—C2—C9—C10 | −44.5 (3) |
N2—C2—C3—C4 | −0.5 (3) | N2—C2—C9—C14 | −100.6 (3) |
C9—C2—C3—C4 | 121.1 (3) | C3—C2—C9—C14 | 137.5 (2) |
N2—C2—C3—C6 | −179.8 (2) | C14—C9—C10—C11 | −0.4 (4) |
C9—C2—C3—C6 | −58.2 (3) | C2—C9—C10—C11 | −178.4 (2) |
C6—C3—C4—N1 | 176.6 (2) | C9—C10—C11—C12 | 0.2 (4) |
C2—C3—C4—N1 | −2.8 (4) | C10—C11—C12—O3 | 179.4 (2) |
C6—C3—C4—C5 | −6.3 (4) | C10—C11—C12—C13 | 0.0 (4) |
C2—C3—C4—C5 | 174.4 (2) | O3—C12—C13—C14 | −179.4 (2) |
C1—N1—C4—C3 | 1.4 (4) | C11—C12—C13—C14 | 0.0 (4) |
C1—N1—C4—C5 | −176.2 (2) | C12—C13—C14—C9 | −0.2 (4) |
C7—O2—C6—O1 | −9.2 (4) | C10—C9—C14—C13 | 0.4 (4) |
C7—O2—C6—C3 | 169.7 (2) | C2—C9—C14—C13 | 178.4 (2) |
C4—C3—C6—O1 | −22.8 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4B···O1i | 0.86 (1) | 2.00 (1) | 2.835 (3) | 166 (3) |
O4—H4A···S1ii | 0.87 (3) | 2.44 (2) | 3.189 (2) | 145 (3) |
N2—H2A···O3iii | 0.89 (1) | 2.10 (1) | 2.988 (3) | 177 (3) |
N1—H1A···S1iv | 0.90 (1) | 2.48 (1) | 3.363 (2) | 170 (2) |
O3—H3···O4 | 0.82 | 1.90 | 2.724 (3) | 179 |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) −x+1, −y+1, −z+1; (iii) −x, −y+1, −z+1; (iv) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C14H16N2O3S·H2O |
Mr | 310.36 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 294 |
a, b, c (Å) | 5.6702 (17), 11.212 (3), 12.343 (4) |
α, β, γ (°) | 90.406 (5), 95.251 (5), 104.393 (5) |
V (Å3) | 756.5 (4) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.23 |
Crystal size (mm) | 0.22 × 0.16 × 0.16 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.951, 0.964 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3958, 2655, 1741 |
Rint | 0.025 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.044, 0.117, 1.01 |
No. of reflections | 2655 |
No. of parameters | 209 |
No. of restraints | 5 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.20, −0.21 |
Computer programs: SMART (Bruker, 1997), SAINT (Bruker, 1997), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Bruker, 1997).
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4B···O1i | 0.855 (10) | 1.999 (14) | 2.835 (3) | 166 (3) |
O4—H4A···S1ii | 0.87 (3) | 2.44 (2) | 3.189 (2) | 145 (3) |
N2—H2A···O3iii | 0.892 (10) | 2.097 (11) | 2.988 (3) | 177 (3) |
N1—H1A···S1iv | 0.895 (10) | 2.479 (11) | 3.363 (2) | 170 (2) |
O3—H3···O4 | 0.82 | 1.90 | 2.724 (3) | 179.3 |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) −x+1, −y+1, −z+1; (iii) −x, −y+1, −z+1; (iv) −x+1, −y+1, −z. |
References
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1–19. CSD CrossRef Web of Science Google Scholar
Atwal, K. S., Swanson, B. N., Unger, S. E., Floyd, D. M., Moreland, S., Hedberg, A. & Reilly, B. C. (1991). J. Med. Chem. 34, 806–811. CrossRef PubMed CAS Web of Science Google Scholar
Bruker (1997). SMART (Version 5.611), SAINT (Version 6.0) and SHELXTL (Version 5.10). Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Mayer, T. M., Kapoor, T. M., Haggarty, S. J., King, R. W., Schreiber, S. L. & Mitchison, T. J. (1999). Science, 286, 971–974. Web of Science CrossRef PubMed CAS Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (1997). SHELXS97 and SHELXL97. University of Göttingen, Germany. 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.
The title compound, (I), is a kind of polyfunctionalized dihydropyrimidines (DHPMs), which represents a heterocyclic system of remarkable pharmacological efficiency and may exhibit antiviral, antitumor, antibacterial, and anti inflammatory properties (Atwal et al., 1991). It is the only cell-permeable molecule currently known to specifically inhibit mitotic kinesis Eg5 and is considered a lead for the development of new anticancer drugs (Mayer et al., 1999).
In the molecule of the title compound, (I), (Fig.1) the bond lengths and angles are within normal ranges (Allen et al., 1987). Rings A (N1/N2/C1—C4) and B (C9—C14) are, of course, planar and they are oriented at a dihedral angle of A/B = 84.31 (2)°.
In the crystal structure, intramolecular O—H···O and intermolecular O—H···O, N—H···O, O—H···S and N—H···S hydrogen bonds (Table 1) link the molecules (Fig. 2), in which they seem to be effective in the stabilization of the structure.