organic compounds
1-(6-Methyl-3-phenyl-2-sulfanylidene-1,2,3,4-tetrahydropyrimidin-5-yl)ethanone
aDepartment of Organic Chemistry, Baku State University, Baku, Azerbaijan, and bDepartamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
*Correspondence e-mail: ivanbritob@yahoo.com
In the title compound, C13H14N2OS, four C atoms of the phenyl ring are disordered over two sets of sites in a 0.60 (3):0.40 (3) ratio. The heterocyclic ring is essentially planar (r.m.s. deviation = 0.017 Å) and forms dihedral angles of 82.0 (2) and 79.3 (3)°, respectively, with the major and minor occupancy components of the phenyl ring. The crystal packing features N—H⋯O hydrogen bonds, which link the molecules into C(6) chains running parallel to the b axis.
Related literature
For synthetic methods, see: Kotharkar et al. (2006); Lu et al. (2000); Salehi et al. (2003); Srinivas & Das (2004). For pharmacological properties of related compounds, see: Dalinger et al. (2004). For graph-set notation see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2005); cell SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536811055309/lr2042sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811055309/lr2042Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811055309/lr2042Isup3.cml
Phenylthiourea, 15.2 g (0.1 mol), 37% water solution of formaldehyde (formaline), 3 g (0.1 mol) and 13 g (0.1 mol) of acetoacetic ester were dissolved in 10 ml of ethanol and then 0.5 ml of trifluoroacetic was added. The mixture was vigorously stirred during 4–5 h at room temperature and then cooled and kept one day at 0°C. The white crystals of 1-(6-methyl-3-phenyl-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl) ethanone were filtered and washed with dichloromethane. Suitable crystal for diffraction were obtained by slow evaporation from ethanol. The yield was of 19.2 g (70%). Mp 180°C. Rf = 0.35. Eluent- ethanol:hexane (5:2). 1H NMR (300 MHz, DMSO-d6) δ 1.35 (s, 3H, CH3), 6.8–7.1 (m, H, Ar), 7.4 (m, H, Ar), 9.35 (s, 1H, NH). 13C NMR (75 MHz, DMSO-d6) δ 24, 29, 37, 51, 86, 117, 122, 129, 132, 141, 151, 179 (C=S), 205 (C=O)
H atoms were placed in calculated position and refined using a riding model, with C—H distances in the range 0.95 — 0.99 Å and N—H distance of 0.88 Å, with Uiso(H) = 1.2Ueq(N,Cmethylene and Caromatic) and 1.5Ueq(Cmethyl ).
Data collection: APEX2 (Bruker, 2005); cell
SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus (Bruker, 2001); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C13H14N2OS | F(000) = 520 |
Mr = 246.32 | Dx = 1.325 Mg m−3 |
Orthorhombic, Pna21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2c -2n | Cell parameters from 7985 reflections |
a = 24.3527 (10) Å | θ = 2.9–28.3° |
b = 7.2374 (3) Å | µ = 0.25 mm−1 |
c = 7.0063 (3) Å | T = 100 K |
V = 1234.86 (9) Å3 | Cube, colourless |
Z = 4 | 0.30 × 0.30 × 0.30 mm |
Bruker APEXII CCD diffractometer | 3089 independent reflections |
Radiation source: fine-focus sealed tube | 2877 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.016 |
ϕ and ω scans | θmax = 28.4°, θmin = 1.7° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | h = −32→32 |
Tmin = 0.930, Tmax = 0.930 | k = −9→9 |
13745 measured reflections | l = −9→9 |
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)] = 0.051 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.141 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0713P)2 + 0.8297P] where P = (Fo2 + 2Fc2)/3 |
3089 reflections | (Δ/σ)max = 0.001 |
150 parameters | Δρmax = 0.40 e Å−3 |
19 restraints | Δρmin = −0.35 e Å−3 |
C13H14N2OS | V = 1234.86 (9) Å3 |
Mr = 246.32 | Z = 4 |
Orthorhombic, Pna21 | Mo Kα radiation |
a = 24.3527 (10) Å | µ = 0.25 mm−1 |
b = 7.2374 (3) Å | T = 100 K |
c = 7.0063 (3) Å | 0.30 × 0.30 × 0.30 mm |
Bruker APEXII CCD diffractometer | 3089 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | 2877 reflections with I > 2σ(I) |
Tmin = 0.930, Tmax = 0.930 | Rint = 0.016 |
13745 measured reflections |
R[F2 > 2σ(F2)] = 0.051 | 19 restraints |
wR(F2) = 0.141 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.40 e Å−3 |
3089 reflections | Δρmin = −0.35 e Å−3 |
150 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 | Occ. (<1) | |
S1 | 0.36824 (2) | 1.18702 (7) | 0.3739 (4) | 0.04639 (18) | |
O1 | 0.51205 (7) | 0.42042 (19) | 0.3715 (9) | 0.0661 (6) | |
N1 | 0.39774 (6) | 0.8325 (2) | 0.3725 (6) | 0.0341 (3) | |
C2 | 0.41226 (7) | 1.0102 (2) | 0.3775 (7) | 0.0314 (3) | |
N3 | 0.46747 (6) | 1.04586 (19) | 0.3735 (7) | 0.0349 (3) | |
H3N | 0.4761 | 1.1644 | 0.3753 | 0.042* | |
C4 | 0.50891 (7) | 0.9147 (2) | 0.3784 (6) | 0.0280 (3) | |
C5 | 0.49517 (7) | 0.7330 (2) | 0.3726 (7) | 0.0327 (4) | |
C6 | 0.43611 (8) | 0.6775 (2) | 0.3775 (11) | 0.0512 (6) | |
H6A | 0.4286 | 0.5959 | 0.2672 | 0.061* | |
H6B | 0.4294 | 0.6051 | 0.4950 | 0.061* | |
C7 | 0.34084 (7) | 0.7781 (2) | 0.3747 (3) | 0.0413 (4) | |
C8 | 0.3095 (2) | 0.7676 (8) | 0.2110 (7) | 0.0577 (9) | 0.60 |
H8A | 0.3243 | 0.8010 | 0.0903 | 0.069* | 0.60 |
C9 | 0.2556 (3) | 0.7066 (7) | 0.2280 (7) | 0.0577 (9) | 0.60 |
H9A | 0.2329 | 0.6976 | 0.1182 | 0.069* | 0.60 |
C8' | 0.3160 (4) | 0.7165 (12) | 0.2081 (8) | 0.0577 (9) | 0.40 |
H8B | 0.3344 | 0.7152 | 0.0885 | 0.069* | 0.40 |
C9' | 0.2620 (4) | 0.6568 (13) | 0.2298 (9) | 0.0577 (9) | 0.40 |
H9B | 0.2427 | 0.6130 | 0.1210 | 0.069* | 0.40 |
C10 | 0.23526 (11) | 0.6591 (3) | 0.4053 (5) | 0.0833 (14) | |
H10A | 0.1983 | 0.6178 | 0.4141 | 0.100* | |
C13 | 0.56501 (7) | 0.9991 (3) | 0.3745 (8) | 0.0406 (4) | |
H13A | 0.5881 | 0.9320 | 0.2833 | 0.061* | |
H13B | 0.5814 | 0.9916 | 0.5020 | 0.061* | |
H13C | 0.5622 | 1.1289 | 0.3358 | 0.061* | |
C14 | 0.53254 (8) | 0.5753 (2) | 0.3726 (8) | 0.0386 (4) | |
C15 | 0.59377 (9) | 0.5914 (3) | 0.3708 (10) | 0.0538 (6) | |
H15A | 0.6101 | 0.4693 | 0.3909 | 0.081* | |
H15B | 0.6055 | 0.6751 | 0.4729 | 0.081* | |
H15C | 0.6058 | 0.6406 | 0.2473 | 0.081* | |
C11 | 0.2664 (2) | 0.6689 (8) | 0.5722 (7) | 0.0577 (9) | 0.60 |
H11A | 0.2516 | 0.6354 | 0.6928 | 0.069* | 0.60 |
C12 | 0.3200 (3) | 0.7300 (7) | 0.5526 (6) | 0.0577 (9) | 0.60 |
H12A | 0.3428 | 0.7392 | 0.6622 | 0.069* | 0.60 |
C11' | 0.2596 (4) | 0.7202 (12) | 0.5726 (11) | 0.0577 (9) | 0.40 |
H11B | 0.2413 | 0.7218 | 0.6924 | 0.069* | 0.40 |
C12' | 0.3133 (4) | 0.7788 (13) | 0.5473 (9) | 0.0577 (9) | 0.40 |
H12B | 0.3325 | 0.8225 | 0.6563 | 0.069* | 0.40 |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0357 (3) | 0.0330 (3) | 0.0704 (4) | 0.00649 (18) | 0.0000 (5) | −0.0009 (5) |
O1 | 0.0503 (9) | 0.0230 (6) | 0.1250 (17) | −0.0015 (6) | −0.014 (2) | 0.006 (2) |
N1 | 0.0267 (7) | 0.0277 (7) | 0.0480 (8) | −0.0031 (5) | 0.0033 (14) | 0.0073 (15) |
C2 | 0.0321 (8) | 0.0271 (7) | 0.0351 (8) | 0.0008 (6) | −0.0035 (14) | −0.0005 (15) |
N3 | 0.0302 (7) | 0.0208 (6) | 0.0537 (9) | −0.0025 (5) | −0.0048 (14) | −0.0063 (15) |
C4 | 0.0280 (7) | 0.0246 (7) | 0.0315 (8) | −0.0019 (6) | −0.0049 (12) | 0.0061 (13) |
C5 | 0.0305 (8) | 0.0246 (7) | 0.0429 (9) | −0.0021 (6) | 0.0070 (16) | 0.0091 (17) |
C6 | 0.0315 (9) | 0.0251 (8) | 0.0970 (18) | −0.0036 (7) | −0.010 (2) | 0.002 (2) |
C7 | 0.0277 (8) | 0.0310 (8) | 0.0652 (12) | −0.0041 (7) | 0.0077 (18) | 0.000 (2) |
C8 | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
C9 | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
C8' | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
C9' | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
C10 | 0.0341 (12) | 0.0659 (17) | 0.150 (4) | −0.0103 (12) | 0.026 (2) | 0.002 (3) |
C13 | 0.0316 (8) | 0.0301 (8) | 0.0601 (12) | −0.0051 (7) | −0.0087 (17) | 0.0104 (19) |
C14 | 0.0399 (9) | 0.0255 (8) | 0.0502 (10) | 0.0019 (7) | −0.0041 (17) | −0.0089 (17) |
C15 | 0.0383 (10) | 0.0368 (10) | 0.0864 (17) | 0.0087 (8) | 0.012 (2) | 0.016 (2) |
C11 | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
C12 | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
C11' | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
C12' | 0.0353 (13) | 0.052 (3) | 0.0853 (11) | −0.0022 (15) | −0.0014 (10) | 0.0077 (14) |
S1—C2 | 1.6694 (17) | C9—H9A | 0.9500 |
O1—C14 | 1.227 (2) | C8'—C9' | 1.393 (3) |
N1—C2 | 1.334 (2) | C8'—H8B | 0.9500 |
N1—C7 | 1.441 (2) | C9'—C10 | 1.391 (3) |
N1—C6 | 1.460 (2) | C9'—H9B | 0.9500 |
C2—N3 | 1.369 (2) | C10—C11' | 1.386 (3) |
N3—C4 | 1.386 (2) | C10—C11 | 1.395 (3) |
N3—H3N | 0.8834 | C10—H10A | 0.9500 |
C4—C5 | 1.357 (2) | C13—H13A | 0.9800 |
C4—C13 | 1.497 (2) | C13—H13B | 0.9800 |
C5—C14 | 1.460 (2) | C13—H13C | 0.9800 |
C5—C6 | 1.494 (2) | C14—C15 | 1.496 (3) |
C6—H6A | 0.9900 | C15—H15A | 0.9800 |
C6—H6B | 0.9900 | C15—H15B | 0.9800 |
C7—C8 | 1.380 (3) | C15—H15C | 0.9800 |
C7—C12' | 1.384 (3) | C11—C12 | 1.386 (3) |
C7—C8' | 1.389 (3) | C11—H11A | 0.9500 |
C7—C12 | 1.390 (3) | C12—H12A | 0.9500 |
C8—C9 | 1.391 (3) | C11'—C12' | 1.385 (3) |
C8—H8A | 0.9500 | C11'—H11B | 0.9500 |
C9—C10 | 1.381 (3) | C12'—H12B | 0.9500 |
C2—N1—C7 | 121.21 (14) | C10—C9'—C8' | 122.3 (9) |
C2—N1—C6 | 124.76 (15) | C10—C9'—H9B | 118.8 |
C7—N1—C6 | 113.90 (14) | C8'—C9'—H9B | 118.8 |
N1—C2—N3 | 116.18 (15) | C9—C10—C11' | 121.9 (6) |
N1—C2—S1 | 124.62 (13) | C9—C10—C9' | 16.3 (4) |
N3—C2—S1 | 119.08 (13) | C11'—C10—C9' | 123.5 (6) |
C2—N3—C4 | 125.84 (14) | C9—C10—C11 | 123.1 (4) |
C2—N3—H3N | 114.6 | C11'—C10—C11 | 16.8 (4) |
C4—N3—H3N | 119.4 | C9'—C10—C11 | 119.2 (6) |
C5—C4—N3 | 118.90 (15) | C9—C10—H10A | 118.4 |
C5—C4—C13 | 128.30 (16) | C11'—C10—H10A | 116.8 |
N3—C4—C13 | 112.62 (14) | C9'—C10—H10A | 119.7 |
C4—C5—C14 | 127.14 (16) | C11—C10—H10A | 118.4 |
C4—C5—C6 | 119.80 (16) | C4—C13—H13A | 109.5 |
C14—C5—C6 | 112.96 (15) | C4—C13—H13B | 109.5 |
N1—C6—C5 | 114.15 (14) | H13A—C13—H13B | 109.5 |
N1—C6—H6A | 108.7 | C4—C13—H13C | 109.5 |
C5—C6—H6A | 108.7 | H13A—C13—H13C | 109.5 |
N1—C6—H6B | 108.7 | H13B—C13—H13C | 109.5 |
C5—C6—H6B | 108.7 | O1—C14—C5 | 117.44 (18) |
H6A—C6—H6B | 107.6 | O1—C14—C15 | 118.47 (18) |
C8—C7—C12' | 117.3 (6) | C5—C14—C15 | 124.08 (16) |
C8—C7—C8' | 16.7 (4) | C14—C15—H15A | 109.5 |
C12'—C7—C8' | 121.6 (6) | C14—C15—H15B | 109.5 |
C8—C7—C12 | 122.0 (4) | H15A—C15—H15B | 109.5 |
C12'—C7—C12 | 16.2 (4) | C14—C15—H15C | 109.5 |
C8'—C7—C12 | 121.0 (6) | H15A—C15—H15C | 109.5 |
C8—C7—N1 | 122.5 (4) | H15B—C15—H15C | 109.5 |
C12'—C7—N1 | 118.4 (5) | C12—C11—C10 | 116.4 (6) |
C8'—C7—N1 | 119.9 (5) | C12—C11—H11A | 121.8 |
C12—C7—N1 | 115.4 (4) | C10—C11—H11A | 121.8 |
C7—C8—C9 | 117.9 (6) | C11—C12—C7 | 120.8 (6) |
C7—C8—H8A | 121.0 | C11—C12—H12A | 119.6 |
C9—C8—H8A | 121.0 | C7—C12—H12A | 119.6 |
C10—C9—C8 | 119.7 (6) | C12'—C11'—C10 | 113.1 (9) |
C10—C9—H9A | 120.2 | C12'—C11'—H11B | 123.4 |
C8—C9—H9A | 120.2 | C10—C11'—H11B | 123.4 |
C7—C8'—C9' | 114.8 (9) | C7—C12'—C11' | 124.7 (10) |
C7—C8'—H8B | 122.6 | C7—C12'—H12B | 117.7 |
C9'—C8'—H8B | 122.6 | C11'—C12'—H12B | 117.7 |
C7—N1—C2—N3 | −179.6 (3) | C12'—C7—C8'—C9' | 0.01 (3) |
C6—N1—C2—N3 | 4.8 (7) | C12—C7—C8'—C9' | 19.0 (5) |
C7—N1—C2—S1 | −3.7 (6) | N1—C7—C8'—C9' | 176.16 (17) |
C6—N1—C2—S1 | −179.4 (4) | C7—C8'—C9'—C10 | 0.00 (3) |
N1—C2—N3—C4 | −4.8 (6) | C8—C9—C10—C11' | 19.9 (5) |
S1—C2—N3—C4 | 179.1 (3) | C8—C9—C10—C9' | −81 (3) |
C2—N3—C4—C5 | 5.2 (6) | C8—C9—C10—C11 | −0.03 (7) |
C2—N3—C4—C13 | −179.3 (4) | C8'—C9'—C10—C9 | 90 (3) |
N3—C4—C5—C14 | 178.7 (4) | C8'—C9'—C10—C11' | 0.01 (7) |
C13—C4—C5—C14 | 4.0 (7) | C8'—C9'—C10—C11 | −19.1 (5) |
N3—C4—C5—C6 | −5.1 (6) | C4—C5—C14—O1 | 178.2 (5) |
C13—C4—C5—C6 | −179.8 (5) | C6—C5—C14—O1 | 1.8 (7) |
C2—N1—C6—C5 | −4.9 (8) | C4—C5—C14—C15 | −2.7 (8) |
C7—N1—C6—C5 | 179.2 (4) | C6—C5—C14—C15 | −179.2 (5) |
C4—C5—C6—N1 | 4.8 (7) | C9—C10—C11—C12 | 0.06 (9) |
C14—C5—C6—N1 | −178.4 (4) | C11'—C10—C11—C12 | −91 (2) |
C2—N1—C7—C8 | 85.5 (4) | C9'—C10—C11—C12 | 18.5 (5) |
C6—N1—C7—C8 | −98.5 (5) | C10—C11—C12—C7 | −0.06 (8) |
C2—N1—C7—C12' | −79.0 (5) | C8—C7—C12—C11 | 0.04 (7) |
C6—N1—C7—C12' | 97.1 (5) | C12'—C7—C12—C11 | 78 (3) |
C2—N1—C7—C8' | 104.8 (5) | C8'—C7—C12—C11 | −19.5 (5) |
C6—N1—C7—C8' | −79.2 (6) | N1—C7—C12—C11 | −177.66 (16) |
C2—N1—C7—C12 | −96.8 (4) | C9—C10—C11'—C12' | −19.3 (5) |
C6—N1—C7—C12 | 79.2 (5) | C9'—C10—C11'—C12' | −0.02 (8) |
C12'—C7—C8—C9 | −17.9 (5) | C11—C10—C11'—C12' | 80 (2) |
C8'—C7—C8—C9 | 92 (2) | C8—C7—C12'—C11' | 18.5 (5) |
C12—C7—C8—C9 | −0.01 (3) | C8'—C7—C12'—C11' | −0.03 (7) |
N1—C7—C8—C9 | 177.52 (17) | C12—C7—C12'—C11' | −93 (3) |
C7—C8—C9—C10 | 0.01 (3) | N1—C7—C12'—C11' | −176.23 (17) |
C8—C7—C8'—C9' | −80 (2) | C10—C11'—C12'—C7 | 0.04 (8) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3N···O1i | 0.88 | 2.05 | 2.920 (2) | 168 |
Symmetry code: (i) x, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | C13H14N2OS |
Mr | 246.32 |
Crystal system, space group | Orthorhombic, Pna21 |
Temperature (K) | 100 |
a, b, c (Å) | 24.3527 (10), 7.2374 (3), 7.0063 (3) |
V (Å3) | 1234.86 (9) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.25 |
Crystal size (mm) | 0.30 × 0.30 × 0.30 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2003) |
Tmin, Tmax | 0.930, 0.930 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13745, 3089, 2877 |
Rint | 0.016 |
(sin θ/λ)max (Å−1) | 0.668 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.141, 1.00 |
No. of reflections | 3089 |
No. of parameters | 150 |
No. of restraints | 19 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.40, −0.35 |
Computer programs: APEX2 (Bruker, 2005), SAINT-Plus (Bruker, 2001), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3N···O1i | 0.88 | 2.05 | 2.920 (2) | 168 |
Symmetry code: (i) x, y+1, z. |
Acknowledgements
The authors thank Baku State University and the Universidad de Antofagasta for supporting this study. Thanks are also given to the Consejo Superior de Investigaciones Científicas (CSIC) of Spain for the award of a license for the use of the Cambridge Structural Database (CSD).
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The dihydropyrimidinethiones display many pharmacological properties (Dalinger et al. 2004), as part of our interest in this kind of materials, we report here the synthesis and crystal structure determination of the title compound. Our synthesis is based in the Bidjinelli reaction, which consists on a three-component condensation of an aldehyde, a methylene active compound and an thiourea derivative in acidic media. This procedure is the most simple and useful for the preparation of 3,4-dihydropyrimidene-2(1H) thiones (Kotharkar et al. 2006; Lu et al. 2000; Srinivas & Das, 2004; Salehi et al. 2003).
In the compound, the C8, C9, C11 and C12 atoms of the phenyl ring are disordered over two sets of sites in a 0.60 (3):0.40 (3) ratio. The heterocycle ring is essentially planar (r.m.s.= 0.017 Å) and form a dihedral angle of 82.0 (2)° with the phenyl ring.The crystal packing is stabilized by intermolecular N3—H3N···O1 hydrogen bonds (Table 1), which link the molecules into chains running parallel to the b axis (Fig.2), with graph-set notation C(6), (Bernstein et al. 1995).