organic compounds
tert-Butyl 4-{[2-amino-4-(2-hydroxyphenyl)pyrimidin-5-yl]methyl}piperazine-1-carboxylate
aP. S. Science and H. D. Patel Arts College, S. V. Campus, Kadi, Gujarat, 382 715, India, bDepartment of Physics, Bhavan's Sheth R. A. College of Science, Ahmedabad, Gujarat, 380 001, India, and cDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: Edward.Tiekink@gmail.com
In the title compound, C20H27N5O3, the central piperazine ring adopts a chair conformation, with the N-bound carboxylate and methylene substituents occupying bisectional and equatorial orientations, respectively. A twist is evident between the aromatic rings [dihedral angle = 25.61 (9)°] but an intramolecular O—H⋯N hydrogen bond persists between these. Supramolecular tapes along [1-10] are formed in the crystal packing through N(amino)—H⋯O(hydroxyl) and N(amino)—H⋯N(pyrimidinyl) hydrogen bonds, and these are linked into layers in the ab plane by π–π interactions [inter-centroid distance between pyrimidinyl rings = 3.5919 (9) Å].
CCDC reference: 961681
Related literature
For the biological activity of pyrimidine-containing et al. (2011); Sbardella et al. (2011); Zhang et al. (2011). For the synthesis, see: Patel et al. (2011).
see: TopalisExperimental
Crystal data
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Data collection: APEX2 (Bruker, 2004); cell APEX2 and SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
CCDC reference: 961681
10.1107/S1600536813025774/hg5347sup1.cif
contains datablocks general, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813025774/hg5347Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813025774/hg5347Isup3.cml
The title compound, (I), was prepared according to the procedure reported in the literature (Patel et al., 2011). Crystals were obtained by were obtained by slow evaporation from an ethanol solution of (I).
The C-bound H atoms were geometrically placed (C—H = 0.93–0.97 Å) and refined as riding with Uiso(H) = 1.2–1.5Ueq(C). The O– and N-bound H-atoms were refined with the distance restraints O—H = 0.82±0.01 and N—H = 0.86±0.01 Å, and with Uiso(H) = 1.5Ueq(O) and 1.2Ueq(N).
Data collection: APEX2 (Bruker, 2004); cell
APEX2 and SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. The molecular structure of (I) showing the atom-labelling scheme and displacement ellipsoids at the 35% probability level. | |
Fig. 2. View of the supramolecular tape along [1 - 1 0] in (I) mediated by N—H···O, N hydrogen bonds, shown as orange and blue dashed lines, respectively. | |
Fig. 3. A view in projection down the b axis of the unit-cell contents for (I). The N—H···O, N—H···N and π—π interactions are shown as orange, blue and purple dashed lines, respectively. |
C20H27N5O3 | F(000) = 824 |
Mr = 385.47 | Dx = 1.231 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 5662 reflections |
a = 6.1925 (2) Å | θ = 2.5–24.9° |
b = 8.2636 (2) Å | µ = 0.09 mm−1 |
c = 40.7287 (11) Å | T = 293 K |
β = 93.513 (2)° | Block, yellow |
V = 2080.27 (10) Å3 | 0.47 × 0.35 × 0.31 mm |
Z = 4 |
Bruker APEXII CCD diffractometer | 4985 independent reflections |
Radiation source: fine-focus sealed tube | 3339 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.026 |
Detector resolution: 10.0 pixels mm-1 | θmax = 28.1°, θmin = 1.0° |
ω and ϕ scan | h = −8→8 |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | k = −10→10 |
Tmin = 0.980, Tmax = 0.997 | l = −53→53 |
20251 measured reflections |
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)] = 0.050 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.141 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0598P)2 + 0.4709P] where P = (Fo2 + 2Fc2)/3 |
4984 reflections | (Δ/σ)max < 0.001 |
265 parameters | Δρmax = 0.19 e Å−3 |
3 restraints | Δρmin = −0.17 e Å−3 |
C20H27N5O3 | V = 2080.27 (10) Å3 |
Mr = 385.47 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 6.1925 (2) Å | µ = 0.09 mm−1 |
b = 8.2636 (2) Å | T = 293 K |
c = 40.7287 (11) Å | 0.47 × 0.35 × 0.31 mm |
β = 93.513 (2)° |
Bruker APEXII CCD diffractometer | 4985 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | 3339 reflections with I > 2σ(I) |
Tmin = 0.980, Tmax = 0.997 | Rint = 0.026 |
20251 measured reflections |
R[F2 > 2σ(F2)] = 0.050 | 3 restraints |
wR(F2) = 0.141 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.19 e Å−3 |
4984 reflections | Δρmin = −0.17 e Å−3 |
265 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. |
x | y | z | Uiso*/Ueq | ||
O1 | 0.91283 (18) | 0.00416 (15) | 0.20530 (3) | 0.0595 (3) | |
O2 | 1.2654 (2) | 0.03360 (18) | 0.19456 (4) | 0.0730 (4) | |
O3 | 0.7761 (2) | 0.93303 (17) | 0.02308 (4) | 0.0754 (4) | |
H1O | 0.890 (3) | 0.881 (3) | 0.0213 (7) | 0.113* | |
N1 | 1.0148 (2) | 0.2184 (2) | 0.17776 (4) | 0.0570 (4) | |
N2 | 0.89391 (19) | 0.36533 (16) | 0.11658 (3) | 0.0439 (3) | |
N3 | 1.2749 (2) | 0.47841 (18) | 0.02609 (3) | 0.0547 (4) | |
N4 | 1.0670 (2) | 0.71577 (17) | 0.03355 (3) | 0.0485 (3) | |
N5 | 1.3458 (3) | 0.7126 (2) | −0.00122 (4) | 0.0586 (4) | |
H1N | 1.453 (2) | 0.660 (2) | −0.0085 (5) | 0.070* | |
H2N | 1.313 (3) | 0.8128 (13) | −0.0043 (5) | 0.070* | |
C1 | 0.9389 (3) | −0.1517 (2) | 0.22215 (5) | 0.0643 (5) | |
C2 | 0.7106 (4) | −0.1849 (3) | 0.23163 (7) | 0.0982 (8) | |
H2A | 0.6168 | −0.1958 | 0.2121 | 0.147* | |
H2B | 0.6619 | −0.0968 | 0.2446 | 0.147* | |
H2C | 0.7084 | −0.2833 | 0.2442 | 0.147* | |
C3 | 1.0205 (6) | −0.2767 (3) | 0.19926 (8) | 0.1142 (10) | |
H3A | 0.9265 | −0.2812 | 0.1796 | 0.171* | |
H3B | 1.0233 | −0.3805 | 0.2099 | 0.171* | |
H3C | 1.1640 | −0.2485 | 0.1936 | 0.171* | |
C4 | 1.0877 (4) | −0.1339 (3) | 0.25247 (6) | 0.0862 (7) | |
H4A | 1.2309 | −0.1087 | 0.2462 | 0.129* | |
H4B | 1.0909 | −0.2334 | 0.2647 | 0.129* | |
H4C | 1.0365 | −0.0483 | 0.2659 | 0.129* | |
C5 | 1.0795 (3) | 0.0788 (2) | 0.19248 (4) | 0.0502 (4) | |
C6 | 1.1675 (3) | 0.3157 (3) | 0.16089 (4) | 0.0583 (5) | |
H6A | 1.3126 | 0.2742 | 0.1656 | 0.070* | |
H6B | 1.1633 | 0.4263 | 0.1688 | 0.070* | |
C7 | 1.1151 (2) | 0.3135 (2) | 0.12434 (4) | 0.0505 (4) | |
H7A | 1.2135 | 0.3848 | 0.1136 | 0.061* | |
H7B | 1.1346 | 0.2048 | 0.1160 | 0.061* | |
C8 | 0.7452 (2) | 0.2609 (2) | 0.13308 (4) | 0.0539 (4) | |
H8A | 0.7585 | 0.1509 | 0.1251 | 0.065* | |
H8B | 0.5978 | 0.2965 | 0.1278 | 0.065* | |
C9 | 0.7909 (3) | 0.2634 (2) | 0.16981 (4) | 0.0571 (5) | |
H9A | 0.7641 | 0.3710 | 0.1782 | 0.069* | |
H9B | 0.6955 | 0.1883 | 0.1801 | 0.069* | |
C10 | 0.8377 (3) | 0.3662 (2) | 0.08106 (4) | 0.0501 (4) | |
H10A | 0.6881 | 0.3998 | 0.0774 | 0.060* | |
H10B | 0.8489 | 0.2566 | 0.0728 | 0.060* | |
C11 | 0.9763 (3) | 0.4747 (2) | 0.06151 (4) | 0.0461 (4) | |
C12 | 1.1442 (3) | 0.4048 (2) | 0.04594 (4) | 0.0523 (4) | |
H12 | 1.1684 | 0.2951 | 0.0497 | 0.063* | |
C13 | 1.2268 (3) | 0.6347 (2) | 0.02015 (4) | 0.0482 (4) | |
C14 | 0.9433 (2) | 0.6398 (2) | 0.05486 (4) | 0.0452 (4) | |
C15 | 0.7717 (3) | 0.7411 (2) | 0.06797 (4) | 0.0496 (4) | |
C16 | 0.6802 (3) | 0.7041 (3) | 0.09754 (5) | 0.0661 (5) | |
H16 | 0.7374 | 0.6190 | 0.1102 | 0.079* | |
C17 | 0.5086 (4) | 0.7892 (3) | 0.10848 (6) | 0.0808 (6) | |
H17 | 0.4508 | 0.7621 | 0.1283 | 0.097* | |
C18 | 0.4230 (4) | 0.9149 (3) | 0.08982 (6) | 0.0800 (6) | |
H18 | 0.3016 | 0.9694 | 0.0964 | 0.096* | |
C19 | 0.5151 (3) | 0.9602 (2) | 0.06172 (6) | 0.0712 (6) | |
H19 | 0.4582 | 1.0475 | 0.0497 | 0.085* | |
C20 | 0.6908 (3) | 0.8788 (2) | 0.05086 (5) | 0.0567 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0471 (6) | 0.0574 (7) | 0.0739 (8) | 0.0036 (5) | 0.0027 (6) | 0.0193 (6) |
O2 | 0.0452 (7) | 0.0813 (9) | 0.0922 (10) | 0.0159 (7) | 0.0017 (6) | 0.0178 (8) |
O3 | 0.0799 (10) | 0.0616 (9) | 0.0863 (10) | 0.0078 (7) | 0.0171 (8) | 0.0277 (7) |
N1 | 0.0377 (7) | 0.0774 (10) | 0.0562 (8) | 0.0055 (7) | 0.0054 (6) | 0.0268 (7) |
N2 | 0.0354 (6) | 0.0546 (8) | 0.0422 (7) | 0.0024 (6) | 0.0075 (5) | 0.0110 (6) |
N3 | 0.0592 (8) | 0.0581 (9) | 0.0484 (8) | −0.0008 (7) | 0.0160 (7) | 0.0056 (7) |
N4 | 0.0494 (7) | 0.0532 (8) | 0.0432 (7) | −0.0058 (6) | 0.0048 (6) | 0.0056 (6) |
N5 | 0.0649 (10) | 0.0591 (9) | 0.0535 (9) | −0.0065 (8) | 0.0181 (7) | 0.0079 (7) |
C1 | 0.0691 (12) | 0.0473 (10) | 0.0758 (13) | 0.0031 (9) | −0.0005 (10) | 0.0118 (9) |
C2 | 0.0747 (15) | 0.0852 (16) | 0.134 (2) | −0.0138 (13) | 0.0032 (14) | 0.0445 (16) |
C3 | 0.156 (3) | 0.0629 (15) | 0.124 (2) | 0.0019 (17) | 0.011 (2) | −0.0182 (15) |
C4 | 0.0856 (15) | 0.0896 (16) | 0.0818 (15) | 0.0095 (13) | −0.0074 (12) | 0.0244 (13) |
C5 | 0.0421 (9) | 0.0593 (10) | 0.0487 (9) | 0.0045 (8) | 0.0001 (7) | 0.0036 (8) |
C6 | 0.0403 (8) | 0.0773 (12) | 0.0574 (10) | −0.0038 (8) | 0.0026 (7) | 0.0172 (9) |
C7 | 0.0358 (8) | 0.0628 (10) | 0.0540 (9) | 0.0031 (7) | 0.0112 (7) | 0.0118 (8) |
C8 | 0.0333 (8) | 0.0714 (11) | 0.0573 (10) | 0.0014 (8) | 0.0060 (7) | 0.0216 (8) |
C9 | 0.0411 (8) | 0.0762 (12) | 0.0554 (10) | 0.0142 (8) | 0.0142 (7) | 0.0245 (9) |
C10 | 0.0463 (9) | 0.0600 (10) | 0.0444 (9) | −0.0030 (8) | 0.0053 (7) | 0.0093 (7) |
C11 | 0.0469 (8) | 0.0537 (9) | 0.0378 (8) | −0.0015 (7) | 0.0033 (6) | 0.0070 (7) |
C12 | 0.0597 (10) | 0.0529 (10) | 0.0454 (9) | 0.0014 (8) | 0.0122 (7) | 0.0069 (7) |
C13 | 0.0506 (9) | 0.0558 (10) | 0.0385 (8) | −0.0084 (8) | 0.0047 (7) | 0.0028 (7) |
C14 | 0.0428 (8) | 0.0546 (9) | 0.0377 (8) | −0.0033 (7) | −0.0005 (6) | 0.0035 (7) |
C15 | 0.0475 (9) | 0.0512 (9) | 0.0500 (9) | −0.0018 (7) | 0.0027 (7) | 0.0020 (7) |
C16 | 0.0683 (12) | 0.0707 (12) | 0.0607 (11) | 0.0132 (10) | 0.0153 (9) | 0.0075 (9) |
C17 | 0.0839 (15) | 0.0805 (15) | 0.0813 (15) | 0.0171 (12) | 0.0316 (12) | 0.0045 (12) |
C18 | 0.0726 (13) | 0.0613 (13) | 0.1083 (18) | 0.0137 (11) | 0.0234 (13) | −0.0116 (12) |
C19 | 0.0693 (12) | 0.0494 (11) | 0.0952 (16) | 0.0089 (9) | 0.0092 (11) | 0.0029 (10) |
C20 | 0.0567 (10) | 0.0460 (9) | 0.0672 (11) | −0.0044 (8) | 0.0020 (8) | 0.0042 (8) |
O1—C5 | 1.336 (2) | C4—H4C | 0.9600 |
O1—C1 | 1.464 (2) | C6—C7 | 1.504 (2) |
O2—C5 | 1.2080 (19) | C6—H6A | 0.9700 |
O3—C20 | 1.354 (2) | C6—H6B | 0.9700 |
O3—H1O | 0.832 (10) | C7—H7A | 0.9700 |
N1—C5 | 1.350 (2) | C7—H7B | 0.9700 |
N1—C6 | 1.447 (2) | C8—C9 | 1.505 (2) |
N1—C9 | 1.453 (2) | C8—H8A | 0.9700 |
N2—C7 | 1.4513 (19) | C8—H8B | 0.9700 |
N2—C8 | 1.4564 (19) | C9—H9A | 0.9700 |
N2—C10 | 1.467 (2) | C9—H9B | 0.9700 |
N3—C12 | 1.326 (2) | C10—C11 | 1.503 (2) |
N3—C13 | 1.345 (2) | C10—H10A | 0.9700 |
N4—C13 | 1.338 (2) | C10—H10B | 0.9700 |
N4—C14 | 1.3476 (19) | C11—C12 | 1.378 (2) |
N5—C13 | 1.339 (2) | C11—C14 | 1.403 (2) |
N5—H1N | 0.861 (9) | C12—H12 | 0.9300 |
N5—H2N | 0.859 (9) | C14—C15 | 1.477 (2) |
C1—C4 | 1.502 (3) | C15—C16 | 1.396 (2) |
C1—C3 | 1.500 (3) | C15—C20 | 1.411 (2) |
C1—C2 | 1.513 (3) | C16—C17 | 1.371 (3) |
C2—H2A | 0.9600 | C16—H16 | 0.9300 |
C2—H2B | 0.9600 | C17—C18 | 1.375 (3) |
C2—H2C | 0.9600 | C17—H17 | 0.9300 |
C3—H3A | 0.9600 | C18—C19 | 1.362 (3) |
C3—H3B | 0.9600 | C18—H18 | 0.9300 |
C3—H3C | 0.9600 | C19—C20 | 1.375 (3) |
C4—H4A | 0.9600 | C19—H19 | 0.9300 |
C4—H4B | 0.9600 | ||
C5—O1—C1 | 121.59 (13) | C6—C7—H7B | 109.5 |
C20—O3—H1O | 106 (2) | H7A—C7—H7B | 108.1 |
C5—N1—C6 | 120.09 (14) | N2—C8—C9 | 111.36 (14) |
C5—N1—C9 | 124.84 (14) | N2—C8—H8A | 109.4 |
C6—N1—C9 | 113.22 (13) | C9—C8—H8A | 109.4 |
C7—N2—C8 | 109.85 (12) | N2—C8—H8B | 109.4 |
C7—N2—C10 | 112.32 (12) | C9—C8—H8B | 109.4 |
C8—N2—C10 | 109.84 (12) | H8A—C8—H8B | 108.0 |
C12—N3—C13 | 114.41 (15) | N1—C9—C8 | 109.68 (13) |
C13—N4—C14 | 119.56 (14) | N1—C9—H9A | 109.7 |
C13—N5—H1N | 116.6 (14) | C8—C9—H9A | 109.7 |
C13—N5—H2N | 115.1 (14) | N1—C9—H9B | 109.7 |
H1N—N5—H2N | 128 (2) | C8—C9—H9B | 109.7 |
O1—C1—C4 | 110.10 (16) | H9A—C9—H9B | 108.2 |
O1—C1—C3 | 110.25 (18) | N2—C10—C11 | 114.62 (13) |
C4—C1—C3 | 111.4 (2) | N2—C10—H10A | 108.6 |
O1—C1—C2 | 101.62 (15) | C11—C10—H10A | 108.6 |
C4—C1—C2 | 110.11 (19) | N2—C10—H10B | 108.6 |
C3—C1—C2 | 112.9 (2) | C11—C10—H10B | 108.6 |
C1—C2—H2A | 109.5 | H10A—C10—H10B | 107.6 |
C1—C2—H2B | 109.5 | C12—C11—C14 | 115.08 (14) |
H2A—C2—H2B | 109.5 | C12—C11—C10 | 117.72 (15) |
C1—C2—H2C | 109.5 | C14—C11—C10 | 126.96 (15) |
H2A—C2—H2C | 109.5 | N3—C12—C11 | 126.47 (17) |
H2B—C2—H2C | 109.5 | N3—C12—H12 | 116.8 |
C1—C3—H3A | 109.5 | C11—C12—H12 | 116.8 |
C1—C3—H3B | 109.5 | N4—C13—N5 | 118.34 (16) |
H3A—C3—H3B | 109.5 | N4—C13—N3 | 124.67 (14) |
C1—C3—H3C | 109.5 | N5—C13—N3 | 116.98 (15) |
H3A—C3—H3C | 109.5 | N4—C14—C11 | 119.68 (14) |
H3B—C3—H3C | 109.5 | N4—C14—C15 | 114.77 (14) |
C1—C4—H4A | 109.5 | C11—C14—C15 | 125.46 (14) |
C1—C4—H4B | 109.5 | C16—C15—C20 | 116.87 (16) |
H4A—C4—H4B | 109.5 | C16—C15—C14 | 121.81 (15) |
C1—C4—H4C | 109.5 | C20—C15—C14 | 121.32 (15) |
H4A—C4—H4C | 109.5 | C17—C16—C15 | 122.15 (19) |
H4B—C4—H4C | 109.5 | C17—C16—H16 | 118.9 |
O2—C5—O1 | 125.84 (16) | C15—C16—H16 | 118.9 |
O2—C5—N1 | 123.43 (16) | C16—C17—C18 | 119.2 (2) |
O1—C5—N1 | 110.66 (13) | C16—C17—H17 | 120.4 |
N1—C6—C7 | 110.82 (14) | C18—C17—H17 | 120.4 |
N1—C6—H6A | 109.5 | C19—C18—C17 | 120.32 (19) |
C7—C6—H6A | 109.5 | C19—C18—H18 | 119.8 |
N1—C6—H6B | 109.5 | C17—C18—H18 | 119.8 |
C7—C6—H6B | 109.5 | C18—C19—C20 | 121.1 (2) |
H6A—C6—H6B | 108.1 | C18—C19—H19 | 119.5 |
N2—C7—C6 | 110.82 (13) | C20—C19—H19 | 119.4 |
N2—C7—H7A | 109.5 | O3—C20—C19 | 117.65 (17) |
C6—C7—H7A | 109.5 | O3—C20—C15 | 122.34 (16) |
N2—C7—H7B | 109.5 | C19—C20—C15 | 119.98 (18) |
C5—O1—C1—C4 | 63.7 (2) | C14—N4—C13—N5 | 179.31 (15) |
C5—O1—C1—C3 | −59.6 (2) | C14—N4—C13—N3 | 0.6 (2) |
C5—O1—C1—C2 | −179.57 (18) | C12—N3—C13—N4 | 2.4 (2) |
C1—O1—C5—O2 | −3.9 (3) | C12—N3—C13—N5 | −176.31 (16) |
C1—O1—C5—N1 | 178.86 (16) | C13—N4—C14—C11 | −3.2 (2) |
C6—N1—C5—O2 | 5.5 (3) | C13—N4—C14—C15 | −179.82 (14) |
C9—N1—C5—O2 | 168.93 (18) | C12—C11—C14—N4 | 2.5 (2) |
C6—N1—C5—O1 | −177.24 (15) | C10—C11—C14—N4 | −171.82 (15) |
C9—N1—C5—O1 | −13.8 (2) | C12—C11—C14—C15 | 178.75 (15) |
C5—N1—C6—C7 | 111.09 (18) | C10—C11—C14—C15 | 4.5 (3) |
C9—N1—C6—C7 | −54.2 (2) | N4—C14—C15—C16 | −157.67 (17) |
C8—N2—C7—C6 | −58.01 (19) | C11—C14—C15—C16 | 25.9 (3) |
C10—N2—C7—C6 | 179.42 (14) | N4—C14—C15—C20 | 23.2 (2) |
N1—C6—C7—N2 | 55.5 (2) | C11—C14—C15—C20 | −153.26 (16) |
C7—N2—C8—C9 | 58.83 (18) | C20—C15—C16—C17 | 4.9 (3) |
C10—N2—C8—C9 | −177.15 (14) | C14—C15—C16—C17 | −174.32 (19) |
C5—N1—C9—C8 | −110.40 (19) | C15—C16—C17—C18 | 0.1 (4) |
C6—N1—C9—C8 | 54.0 (2) | C16—C17—C18—C19 | −3.6 (4) |
N2—C8—C9—N1 | −56.0 (2) | C17—C18—C19—C20 | 1.9 (4) |
C7—N2—C10—C11 | −59.36 (19) | C18—C19—C20—O3 | −178.7 (2) |
C8—N2—C10—C11 | 178.07 (14) | C18—C19—C20—C15 | 3.3 (3) |
N2—C10—C11—C12 | 98.42 (18) | C16—C15—C20—O3 | 175.57 (18) |
N2—C10—C11—C14 | −87.4 (2) | C14—C15—C20—O3 | −5.2 (3) |
C13—N3—C12—C11 | −3.1 (3) | C16—C15—C20—C19 | −6.5 (3) |
C14—C11—C12—N3 | 0.8 (3) | C14—C15—C20—C19 | 172.72 (17) |
C10—C11—C12—N3 | 175.61 (16) |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H1O···N4 | 0.83 (1) | 1.80 (2) | 2.560 (2) | 151 (3) |
N5—H1N···N3i | 0.86 (1) | 2.19 (1) | 3.054 (2) | 179 (2) |
N5—H2N···O3ii | 0.86 (1) | 2.29 (1) | 3.139 (2) | 169 (2) |
Symmetry codes: (i) −x+3, −y+1, −z; (ii) −x+2, −y+2, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H1O···N4 | 0.832 (10) | 1.802 (17) | 2.560 (2) | 151 (3) |
N5—H1N···N3i | 0.861 (9) | 2.193 (10) | 3.054 (2) | 179 (2) |
N5—H2N···O3ii | 0.859 (9) | 2.292 (10) | 3.139 (2) | 168.9 (19) |
Symmetry codes: (i) −x+3, −y+1, −z; (ii) −x+2, −y+2, −z. |
Footnotes
‡Additional correspondence author, e-mail: mmjotani@rediffmail.com.
Acknowledgements
The authors are grateful to the Department of Science and Technology (DST), and SAIF, IIT Madras, Chennai, India, for the X-ray data collection. MCP is thankful to the University Grant Commission, New Delhi, India, for research funding under research project No. 39–715/2010(SR). The authors also thank the Ministry of Higher Education, Malaysia, for funding structural studies through the High-Impact Research scheme (UM.C/HIR-MOHE/SC/03).
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Pyrimidine-containing heterocyclic compounds show significant biological importance through various activities such as anti-viral, anti-tumour, anti-proliferative, anti-diabatic, anti-bacterial, etc. (Topalis et al., 2011; Sbardella et al., 2011; Zhang et al., 2011). It was the effectiveness of these derivatives against anti-microbial strains, such as S. aureus and P. aeruginosa, that motivated the present structural studies of a title compound, (I).
Despite there being a twist between the two aromatic rings in (I), Fig. 1, manifested in a dihedral angle of 25.61 (9)°, an intramolecular O—H···N hydrogen bond persists, Table 1. The piperazine ring adopts a chair conformation, and the N1- and N2-bound carboxylate and methylene substituents have bisectional and equatorial orientations, respectively.
In the crystal packing molecules assemble into supramolecular tapes along [1 - 1 0]. The amino-H atoms form hydrogen bonds (Table 1) to pyrimidinyl-N and hydroxyl-O atoms from different molecules, forming centrosymmetric eight-membered {···HNCN}2 and 16-membered {···HNCNC3O}2 synthons, respectively, Fig. 2. Layers in the ab plane are formed by π—π interactions occurring between centrosymmetrically related pyrimidinyl ring [inter-centroid distance = 3.5919 (9) Å for symmetry operation 2 - x, 1 - y, -z], with the layers being associated via hydrophobic interactions, Fig. 3.