organic compounds
3-(2-Amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-5-fluoro-3-hydroxy-1-methylindolin-2-one methanol hemisolvate
aDepartment of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA, and bDepartment of Chemistry, University of Kentucky, Lexington, KY 40506, USA
*Correspondence e-mail: pcrooks@email.uky.edu
In the title compound, C13H13FN4O3·0.5CH3OH, molecules are packed in the by a series of O—H⋯N, N—H⋯O, N—H⋯F and O—H⋯O intermolecular hydrogen bonds. The indole and creatinine units make a dihedral angle of 60.80 (4)°.
Related literature
For the biological activity of isatin and its derivatives, see: Pandeya et al. (2005); The endogenous oxindoles 5-hydroxyoxindole and isatin are antiproliferative and proapoptotic, see: Cane et al. (2000). For the in vitro cytotoxicity evaluation of some substituted isatin derivatives, see: Vine et al. (2007). For 2-indol-3-yl-methylenequinuclidin-3-ols and NADPH oxidase activity, see: Sekhar et al. (2003) and for novel substituted (Z)-2-(N-benzylindol-3-ylmethylene)quinuclidin-3-one and (Z)-(±)-2-(N-benzylindol-3-yl methylene)quinuclidin-3-ol derivatives as potent thermal sensitizing agents, see: Sonar et al. (2007). For the crystal and molecular structure of isatin, see: Frolova et al. (1988), for 3-(2-amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-3-hydroxyindolin-2-one monohydrate, see: Penthala et al. (2009) and for 1,1′-diacetyl-3-hydroxy-2,2′,3,3′-tetrahydro-3,3′-bi(1H-indole)-2,2′-dione, see: Usman et al. (2002). For the aldol condensation enolate mechanism via a six-membered transition state, see: Zimmerman & Traxler (1957).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2006); cell SAINT (Bruker, 2006); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 and local procedures.
Supporting information
https://doi.org/10.1107/S1600536809043797/hg2556sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809043797/hg2556Isup2.hkl
A mixture of 5-fluoro-N-methyl isatin (1 mmol), creatinine (1.1 mmol) and sodium acetate (1.2 mmol) in acetic acid (1 ml) was irradiated in a domestic microwave oven for 30 sec with intermittent cooling every 5 sec. The reaction mixture was allowed to cool to room temperature, 10 ml of saturated sodium bicarbonate solution was added, and the mixture was stirred for 10 minutes. The precipitate thus obtained was collected by filtration, washed with cold water and dried, to afford the crude product. Crystallization from methyl alcohol gave a white crystalline product of 3-(2-amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)- 5-fluoro-3-hydroxy-1-methylindolin-2-one methanolate, which was suitable for X-ray analysis. 1H NMR (DMSO-d6): δ 3.05 (s, 3H), 3.18 (s, 3H), 4.11 (s, 1H), 6.58 (s, 1H, OH), 6.85–6.89 (dd, J=2.7 Hz, J=5.4 Hz, 1H), 6.93–6.97 (dd, J=2.7 Hz, J=4.2 Hz, 1H), 7.11–7.18 (m, 1H), 7.42 (bs, 1H, NH), 7.72 (bs, 1H, NH), p.p.m.; 13C NMR (DMSO-d6): δ 26.08, 32.76, 48.62, 69.87, 76.29, 109.14, 109.25, 111.16, 111.50, 115.42, 115.72, 128.84, 128.95, 140.23, 156.35, 159.49, 171.98, 173.97, 181.85 p.p.m..
H atoms were found in difference Fourier maps and subsequently placed in idealized positions with constrained distances of 0.98Å (RCH3), 1.00 Å (R3CH), 0.95 Å (CArH), 0.84 Å (O—H), 0.88 Å (N—H), and with Uiso(H) values set to either 1.2Ueq or 1.5Ueq (RCH3, OH) of the attached atom.
The presence of difference map peaks in the vicinity of the 2-fold axis at ca (1/4,0.62,0) were consistent with a disordered methanol solvent molecule. This methanol was modelled at half occupancy, such that application of the 2-fold
generates a full occupancy for the site. There is an O—H···O hydrogen-bonding interaction between this methanol and O3 of the main molecule (see Table 1).Isatin analogs display diverse biological activities, (Pandeya et al., 2005; Cane et al., 2000 and Vine et al., 2007). In continuation of our work on radiosensitizers (Sekhar et al., 2003; Sonar et al., 2007), we focused on the design, synthesis and structural analysis of a series of 3-(2-amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-3 -hydroxyindolin-2-one analogs with different substituents on the indole moiety. The main aim of X-ray analysis of the title compound was to confirm the stereochemistry of the molecule and to obtain detailed information on the structural conformation, which may be useful in structure-activity relationship (SAR) analysis. The title compound was prepared by the aldol condensation of 5-fluoro-N-methyl indol-2,3-dione with 2-amino- 1-methyl-1H-imidazol-4(5H)-one (creatinine) in the presence of sodium acetate in acetic acid under microwave irradiation. The compound was crystallized from methyl alcohol. This aldol condensation reaction proceeds by the formation of the E-enolate, as per the Zimmerman-Traxler model (Zimmerman & Traxler, 1957). The molecular structure and the atom-numbering scheme are shown in Fig.1. The isatin ring is planar with r.m.s. deviation of 0.0232 (11) Å and the creatinine ring has r.m.s. deviation of 0.0307 (8) Å. with bond distances and angles comparable with those previously reported for other isatin derivatives (Frolova et al., 1988; Usman et al., 2002 and Penthala et al. (2009). The indole and creatinine moieties make a dihedral angle of 60.80 (4) °. Intermolecular O—H···N, N—H···O, N—H···F and O—H···O hydrogen bonds stabilize the
and form a supramolecular aggregation.For the biological activity of isatin and its derivatives, see: Pandeya et al. (2005); The endogenous oxindoles 5-hydroxyoxindole and isatin are antiproliferative and proapoptotic, see: Cane et al. (2000). For the in vitro cytotoxicity evaluation of some substituted isatin derivatives, see: Vine et al. (2007). For 2-indol-3-yl-methylenequinuclidin-3-ols and NADPH oxidase activity, see: Sekhar et al. (2003) and for novel substituted (Z)-2-(N-benzylindol-3-ylmethylene)quinuclidin-3-one and (Z)-(±)-2-(N-benzylindol-3-yl methylene)quinuclidin-3-ol derivatives as potent thermal sensitizing agents, see: Sonar et al. (2007). For the crystal and molecular structure of isatin, see: Frolova et al. (1988), for 3-(2-amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-3-hydroxyindolin-2-one monohydrate, see: Penthala et al. (2009) and for 1,1'-diacetyl-3-hydroxy-2,2',3,3'-tetrahydro-3,3'-bi(1H-indole)-2,2'-dione, see: Usman et al. (2002). For the aldol condensation enolate mechanism via a six-membered transition state, see: Zimmerman & Traxler (1957).
Data collection: APEX2 (Bruker, 2006); cell
SAINT (Bruker, 2006); data reduction: SAINT (Bruker, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and local procedures.Fig. 1. A view of the molecule with the atom numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. |
C13H13FN4O3·0.5CH4O | F(000) = 1288 |
Mr = 308.30 | Dx = 1.536 Mg m−3 |
Monoclinic, I2/a | Cu Kα radiation, λ = 1.54178 Å |
Hall symbol: -I 2ya | Cell parameters from 9961 reflections |
a = 14.3088 (3) Å | θ = 4.8–68.5° |
b = 10.7900 (2) Å | µ = 1.04 mm−1 |
c = 18.1286 (5) Å | T = 90 K |
β = 107.676 (1)° | Rod, colourless |
V = 2666.77 (10) Å3 | 0.15 × 0.03 × 0.02 mm |
Z = 8 |
Bruker X8 Proteum diffractometer | 2448 independent reflections |
Radiation source: fine-focus rotating anode | 2196 reflections with I > 2σ(I) |
Graded multilayer optics monochromator | Rint = 0.041 |
Detector resolution: 5.6 pixels mm-1 | θmax = 68.5°, θmin = 4.8° |
φ and ω scans | h = −17→17 |
Absorption correction: multi-scan (SADABS in APEX2; Bruker, 2006) | k = −13→13 |
Tmin = 0.805, Tmax = 0.979 | l = −17→21 |
19606 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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.092 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0452P)2 + 3.1985P] where P = (Fo2 + 2Fc2)/3 |
2448 reflections | (Δ/σ)max < 0.001 |
211 parameters | Δρmax = 0.25 e Å−3 |
0 restraints | Δρmin = −0.27 e Å−3 |
C13H13FN4O3·0.5CH4O | V = 2666.77 (10) Å3 |
Mr = 308.30 | Z = 8 |
Monoclinic, I2/a | Cu Kα radiation |
a = 14.3088 (3) Å | µ = 1.04 mm−1 |
b = 10.7900 (2) Å | T = 90 K |
c = 18.1286 (5) Å | 0.15 × 0.03 × 0.02 mm |
β = 107.676 (1)° |
Bruker X8 Proteum diffractometer | 2448 independent reflections |
Absorption correction: multi-scan (SADABS in APEX2; Bruker, 2006) | 2196 reflections with I > 2σ(I) |
Tmin = 0.805, Tmax = 0.979 | Rint = 0.041 |
19606 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.092 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.25 e Å−3 |
2448 reflections | Δρmin = −0.27 e Å−3 |
211 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 > 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 | Occ. (<1) | |
F1 | 0.71683 (6) | 0.82226 (8) | 0.40909 (5) | 0.0226 (2) | |
O1 | 0.34944 (7) | 0.34900 (10) | 0.34227 (6) | 0.0220 (2) | |
N1 | 0.40050 (8) | 0.53388 (11) | 0.40330 (7) | 0.0180 (3) | |
C1 | 0.40738 (10) | 0.43524 (13) | 0.35922 (8) | 0.0171 (3) | |
O2 | 0.56972 (7) | 0.35213 (9) | 0.37870 (6) | 0.0182 (2) | |
H2 | 0.5465 | 0.2822 | 0.3628 | 0.027* | |
N2 | 0.48670 (8) | 0.61111 (11) | 0.17484 (7) | 0.0186 (3) | |
C2 | 0.50466 (10) | 0.44565 (13) | 0.33829 (8) | 0.0164 (3) | |
O3 | 0.34268 (7) | 0.56370 (9) | 0.20215 (6) | 0.0207 (2) | |
N3 | 0.64656 (9) | 0.58544 (12) | 0.16571 (8) | 0.0230 (3) | |
H3A | 0.7006 | 0.5411 | 0.1762 | 0.028* | |
H3B | 0.6417 | 0.6549 | 0.1393 | 0.028* | |
C3 | 0.54173 (10) | 0.57182 (13) | 0.37146 (8) | 0.0162 (3) | |
N4 | 0.57662 (8) | 0.44285 (11) | 0.22994 (7) | 0.0168 (3) | |
C4 | 0.62309 (10) | 0.64045 (13) | 0.37024 (8) | 0.0168 (3) | |
H4 | 0.6668 | 0.6122 | 0.3436 | 0.020* | |
C5 | 0.63765 (10) | 0.75245 (14) | 0.40985 (8) | 0.0181 (3) | |
C6 | 0.57663 (11) | 0.79772 (14) | 0.44928 (8) | 0.0205 (3) | |
H6 | 0.5904 | 0.8747 | 0.4758 | 0.025* | |
C7 | 0.49419 (11) | 0.72920 (14) | 0.44984 (8) | 0.0206 (3) | |
H7 | 0.4503 | 0.7582 | 0.4762 | 0.025* | |
C8 | 0.47874 (10) | 0.61742 (13) | 0.41062 (8) | 0.0174 (3) | |
C9 | 0.32581 (11) | 0.54673 (15) | 0.44237 (9) | 0.0227 (3) | |
H9A | 0.2715 | 0.5971 | 0.4105 | 0.034* | |
H9B | 0.3544 | 0.5872 | 0.4926 | 0.034* | |
H9C | 0.3013 | 0.4646 | 0.4503 | 0.034* | |
C10 | 0.48606 (10) | 0.43188 (13) | 0.25013 (8) | 0.0158 (3) | |
H10 | 0.4521 | 0.3519 | 0.2308 | 0.019* | |
C11 | 0.42843 (10) | 0.54179 (13) | 0.20572 (8) | 0.0166 (3) | |
C12 | 0.57275 (10) | 0.54783 (13) | 0.18962 (8) | 0.0174 (3) | |
C13 | 0.65283 (10) | 0.34938 (13) | 0.24071 (9) | 0.0200 (3) | |
H13A | 0.6606 | 0.3276 | 0.1904 | 0.030* | |
H13B | 0.6344 | 0.2753 | 0.2644 | 0.030* | |
H13C | 0.7149 | 0.3822 | 0.2746 | 0.030* | |
O1S | 0.2149 (2) | 0.6430 (4) | 0.05671 (19) | 0.0769 (13) | 0.50 |
H1S4 | 0.2574 | 0.6239 | 0.0984 | 0.115* | 0.50 |
C1S | 0.2489 (9) | 0.6226 (3) | −0.0003 (6) | 0.0403 (9) | 0.5 |
H1S1 | 0.3121 | 0.6649 | 0.0091 | 0.060* | 0.50 |
H2S1 | 0.2026 | 0.6540 | −0.0482 | 0.060* | 0.50 |
H3S1 | 0.2580 | 0.5332 | −0.0051 | 0.060* | 0.50 |
U11 | U22 | U33 | U12 | U13 | U23 | |
F1 | 0.0206 (4) | 0.0228 (5) | 0.0262 (5) | −0.0075 (3) | 0.0100 (3) | −0.0027 (3) |
O1 | 0.0189 (5) | 0.0224 (5) | 0.0266 (6) | −0.0049 (4) | 0.0098 (4) | −0.0021 (4) |
N1 | 0.0153 (6) | 0.0215 (6) | 0.0188 (6) | −0.0016 (5) | 0.0076 (5) | −0.0022 (5) |
C1 | 0.0156 (7) | 0.0204 (7) | 0.0158 (7) | 0.0003 (5) | 0.0056 (5) | 0.0016 (5) |
O2 | 0.0172 (5) | 0.0165 (5) | 0.0200 (5) | 0.0007 (4) | 0.0043 (4) | 0.0002 (4) |
N2 | 0.0174 (6) | 0.0192 (6) | 0.0203 (6) | 0.0003 (5) | 0.0073 (5) | 0.0020 (5) |
C2 | 0.0138 (6) | 0.0176 (7) | 0.0180 (7) | −0.0001 (5) | 0.0052 (5) | 0.0006 (5) |
O3 | 0.0153 (5) | 0.0223 (5) | 0.0246 (5) | 0.0007 (4) | 0.0065 (4) | 0.0000 (4) |
N3 | 0.0202 (6) | 0.0225 (6) | 0.0297 (7) | 0.0015 (5) | 0.0129 (5) | 0.0070 (5) |
C3 | 0.0160 (7) | 0.0175 (7) | 0.0145 (6) | 0.0016 (5) | 0.0039 (5) | 0.0012 (5) |
N4 | 0.0158 (6) | 0.0166 (6) | 0.0206 (6) | 0.0013 (4) | 0.0096 (5) | 0.0014 (5) |
C4 | 0.0152 (6) | 0.0196 (7) | 0.0158 (7) | 0.0008 (5) | 0.0050 (5) | 0.0004 (5) |
C5 | 0.0158 (6) | 0.0197 (7) | 0.0180 (7) | −0.0029 (5) | 0.0037 (5) | 0.0029 (5) |
C6 | 0.0231 (7) | 0.0192 (7) | 0.0184 (7) | −0.0004 (6) | 0.0051 (6) | −0.0032 (6) |
C7 | 0.0199 (7) | 0.0241 (7) | 0.0190 (7) | 0.0013 (6) | 0.0078 (6) | −0.0028 (6) |
C8 | 0.0147 (6) | 0.0211 (7) | 0.0160 (7) | 0.0000 (5) | 0.0039 (5) | 0.0012 (5) |
C9 | 0.0184 (7) | 0.0321 (8) | 0.0206 (7) | −0.0025 (6) | 0.0103 (6) | −0.0039 (6) |
C10 | 0.0133 (7) | 0.0168 (7) | 0.0185 (7) | −0.0015 (5) | 0.0069 (5) | −0.0010 (5) |
C11 | 0.0160 (7) | 0.0176 (7) | 0.0160 (7) | −0.0003 (5) | 0.0044 (5) | −0.0027 (5) |
C12 | 0.0181 (7) | 0.0184 (7) | 0.0160 (7) | −0.0015 (5) | 0.0058 (5) | −0.0016 (5) |
C13 | 0.0183 (7) | 0.0197 (7) | 0.0245 (7) | 0.0034 (6) | 0.0102 (6) | 0.0008 (6) |
O1S | 0.0548 (19) | 0.136 (4) | 0.0458 (18) | 0.060 (2) | 0.0247 (16) | 0.038 (2) |
C1S | 0.0351 (15) | 0.0419 (18) | 0.0384 (17) | 0.012 (4) | 0.0029 (13) | −0.033 (4) |
F1—C5 | 1.3641 (16) | C4—C5 | 1.389 (2) |
O1—C1 | 1.2220 (17) | C4—H4 | 0.9500 |
N1—C1 | 1.3525 (19) | C5—C6 | 1.375 (2) |
N1—C8 | 1.4117 (18) | C6—C7 | 1.395 (2) |
N1—C9 | 1.4570 (18) | C6—H6 | 0.9500 |
C1—C2 | 1.5539 (19) | C7—C8 | 1.383 (2) |
O2—C2 | 1.4168 (16) | C7—H7 | 0.9500 |
O2—H2 | 0.8400 | C9—H9A | 0.9800 |
N2—C11 | 1.3606 (18) | C9—H9B | 0.9800 |
N2—C12 | 1.3615 (18) | C9—H9C | 0.9800 |
C2—C3 | 1.5175 (19) | C10—C11 | 1.5270 (19) |
C2—C10 | 1.546 (2) | C10—H10 | 1.0000 |
O3—C11 | 1.2318 (17) | C13—H13A | 0.9800 |
N3—C12 | 1.3214 (19) | C13—H13B | 0.9800 |
N3—H3A | 0.8800 | C13—H13C | 0.9800 |
N3—H3B | 0.8800 | O1S—C1S | 1.288 (10) |
C3—C4 | 1.386 (2) | O1S—H1S4 | 0.8400 |
C3—C8 | 1.395 (2) | C1S—H1S1 | 0.9800 |
N4—C12 | 1.3401 (19) | C1S—H2S1 | 0.9800 |
N4—C13 | 1.4543 (18) | C1S—H3S1 | 0.9800 |
N4—C10 | 1.4544 (17) | ||
C1—N1—C8 | 111.10 (12) | C7—C8—C3 | 122.81 (13) |
C1—N1—C9 | 123.91 (12) | C7—C8—N1 | 127.11 (13) |
C8—N1—C9 | 124.85 (12) | C3—C8—N1 | 110.08 (12) |
O1—C1—N1 | 125.61 (13) | N1—C9—H9A | 109.5 |
O1—C1—C2 | 125.69 (13) | N1—C9—H9B | 109.5 |
N1—C1—C2 | 108.59 (11) | H9A—C9—H9B | 109.5 |
C2—O2—H2 | 109.5 | N1—C9—H9C | 109.5 |
C11—N2—C12 | 105.90 (12) | H9A—C9—H9C | 109.5 |
O2—C2—C3 | 109.77 (11) | H9B—C9—H9C | 109.5 |
O2—C2—C10 | 110.25 (11) | N4—C10—C11 | 100.60 (11) |
C3—C2—C10 | 115.20 (11) | N4—C10—C2 | 111.45 (11) |
O2—C2—C1 | 108.60 (11) | C11—C10—C2 | 111.49 (11) |
C3—C2—C1 | 101.49 (11) | N4—C10—H10 | 111.0 |
C10—C2—C1 | 111.09 (11) | C11—C10—H10 | 111.0 |
C12—N3—H3A | 120.0 | C2—C10—H10 | 111.0 |
C12—N3—H3B | 120.0 | O3—C11—N2 | 126.72 (13) |
H3A—N3—H3B | 120.0 | O3—C11—C10 | 123.14 (13) |
C4—C3—C8 | 119.69 (13) | N2—C11—C10 | 110.09 (11) |
C4—C3—C2 | 131.87 (13) | N3—C12—N4 | 122.26 (13) |
C8—C3—C2 | 108.42 (12) | N3—C12—N2 | 123.14 (13) |
C12—N4—C13 | 124.37 (12) | N4—C12—N2 | 114.60 (12) |
C12—N4—C10 | 108.28 (11) | N4—C13—H13A | 109.5 |
C13—N4—C10 | 126.78 (11) | N4—C13—H13B | 109.5 |
C3—C4—C5 | 116.85 (13) | H13A—C13—H13B | 109.5 |
C3—C4—H4 | 121.6 | N4—C13—H13C | 109.5 |
C5—C4—H4 | 121.6 | H13A—C13—H13C | 109.5 |
F1—C5—C6 | 118.00 (13) | H13B—C13—H13C | 109.5 |
F1—C5—C4 | 118.03 (12) | C1S—O1S—H1S4 | 109.5 |
C6—C5—C4 | 123.97 (13) | O1S—C1S—H1S1 | 109.5 |
C5—C6—C7 | 119.17 (13) | O1S—C1S—H2S1 | 109.5 |
C5—C6—H6 | 120.4 | H1S1—C1S—H2S1 | 109.5 |
C7—C6—H6 | 120.4 | O1S—C1S—H3S1 | 109.5 |
C8—C7—C6 | 117.51 (13) | H1S1—C1S—H3S1 | 109.5 |
C8—C7—H7 | 121.2 | H2S1—C1S—H3S1 | 109.5 |
C6—C7—H7 | 121.2 | ||
C8—N1—C1—O1 | −179.11 (13) | C2—C3—C8—N1 | −2.46 (15) |
C9—N1—C1—O1 | 5.0 (2) | C1—N1—C8—C7 | 178.43 (14) |
C8—N1—C1—C2 | 4.55 (15) | C9—N1—C8—C7 | −5.7 (2) |
C9—N1—C1—C2 | −171.35 (12) | C1—N1—C8—C3 | −1.40 (16) |
O1—C1—C2—O2 | −66.31 (17) | C9—N1—C8—C3 | 174.45 (13) |
N1—C1—C2—O2 | 110.02 (12) | C12—N4—C10—C11 | 6.11 (14) |
O1—C1—C2—C3 | 178.05 (13) | C13—N4—C10—C11 | −165.51 (13) |
N1—C1—C2—C3 | −5.62 (14) | C12—N4—C10—C2 | −112.18 (13) |
O1—C1—C2—C10 | 55.09 (18) | C13—N4—C10—C2 | 76.20 (17) |
N1—C1—C2—C10 | −128.58 (12) | O2—C2—C10—N4 | −60.19 (14) |
O2—C2—C3—C4 | 68.20 (19) | C3—C2—C10—N4 | 64.70 (15) |
C10—C2—C3—C4 | −56.9 (2) | C1—C2—C10—N4 | 179.38 (11) |
C1—C2—C3—C4 | −177.03 (14) | O2—C2—C10—C11 | −171.72 (10) |
O2—C2—C3—C8 | −110.02 (13) | C3—C2—C10—C11 | −46.83 (16) |
C10—C2—C3—C8 | 124.84 (13) | C1—C2—C10—C11 | 67.85 (14) |
C1—C2—C3—C8 | 4.74 (14) | C12—N2—C11—O3 | −176.78 (14) |
C8—C3—C4—C5 | 0.7 (2) | C12—N2—C11—C10 | 5.73 (15) |
C2—C3—C4—C5 | −177.33 (13) | N4—C10—C11—O3 | 175.06 (13) |
C3—C4—C5—F1 | −179.53 (12) | C2—C10—C11—O3 | −66.68 (17) |
C3—C4—C5—C6 | −0.1 (2) | N4—C10—C11—N2 | −7.34 (14) |
F1—C5—C6—C7 | 178.89 (12) | C2—C10—C11—N2 | 110.92 (13) |
C4—C5—C6—C7 | −0.6 (2) | C13—N4—C12—N3 | −10.8 (2) |
C5—C6—C7—C8 | 0.5 (2) | C10—N4—C12—N3 | 177.36 (13) |
C6—C7—C8—C3 | 0.1 (2) | C13—N4—C12—N2 | 168.57 (12) |
C6—C7—C8—N1 | −179.68 (13) | C10—N4—C12—N2 | −3.30 (16) |
C4—C3—C8—C7 | −0.8 (2) | C11—N2—C12—N3 | 177.68 (13) |
C2—C3—C8—C7 | 177.70 (13) | C11—N2—C12—N4 | −1.65 (16) |
C4—C3—C8—N1 | 179.06 (12) |
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···N2i | 0.84 | 1.97 | 2.8074 (16) | 171 |
N3—H3A···O3ii | 0.88 | 2.25 | 3.1265 (16) | 177 |
N3—H3B···O1iii | 0.88 | 2.12 | 2.8490 (17) | 140 |
N3—H3B···F1iv | 0.88 | 2.45 | 2.8743 (14) | 110 |
O1S—H1S4···O3 | 0.84 | 2.01 | 2.846 (3) | 171 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x+1/2, −y+1, z; (iii) −x+1, y+1/2, −z+1/2; (iv) −x+3/2, −y+3/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C13H13FN4O3·0.5CH4O |
Mr | 308.30 |
Crystal system, space group | Monoclinic, I2/a |
Temperature (K) | 90 |
a, b, c (Å) | 14.3088 (3), 10.7900 (2), 18.1286 (5) |
β (°) | 107.676 (1) |
V (Å3) | 2666.77 (10) |
Z | 8 |
Radiation type | Cu Kα |
µ (mm−1) | 1.04 |
Crystal size (mm) | 0.15 × 0.03 × 0.02 |
Data collection | |
Diffractometer | Bruker X8 Proteum |
Absorption correction | Multi-scan (SADABS in APEX2; Bruker, 2006) |
Tmin, Tmax | 0.805, 0.979 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 19606, 2448, 2196 |
Rint | 0.041 |
(sin θ/λ)max (Å−1) | 0.604 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.092, 1.04 |
No. of reflections | 2448 |
No. of parameters | 211 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.25, −0.27 |
Computer programs: APEX2 (Bruker, 2006), SAINT (Bruker, 2006), SHELXS97 (Sheldrick, 2008), XP in SHELXTL (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008) and local procedures.
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2···N2i | 0.84 | 1.97 | 2.8074 (16) | 170.9 |
N3—H3A···O3ii | 0.88 | 2.25 | 3.1265 (16) | 177.1 |
N3—H3B···O1iii | 0.88 | 2.12 | 2.8490 (17) | 139.9 |
N3—H3B···F1iv | 0.88 | 2.45 | 2.8743 (14) | 110.0 |
O1S—H1S4···O3 | 0.84 | 2.01 | 2.846 (3) | 171.2 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x+1/2, −y+1, z; (iii) −x+1, y+1/2, −z+1/2; (iv) −x+3/2, −y+3/2, −z+1/2. |
Acknowledgements
This investigation was supported by NIH/National Cancer Institute grant PO1 CA104457 (PAC) and by NSF MRI grant CHE 0319176 (SP).
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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.
Isatin analogs display diverse biological activities, (Pandeya et al., 2005; Cane et al., 2000 and Vine et al., 2007). In continuation of our work on radiosensitizers (Sekhar et al., 2003; Sonar et al., 2007), we focused on the design, synthesis and structural analysis of a series of 3-(2-amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-5-yl)-3 -hydroxyindolin-2-one analogs with different substituents on the indole moiety. The main aim of X-ray analysis of the title compound was to confirm the stereochemistry of the molecule and to obtain detailed information on the structural conformation, which may be useful in structure-activity relationship (SAR) analysis. The title compound was prepared by the aldol condensation of 5-fluoro-N-methyl indol-2,3-dione with 2-amino- 1-methyl-1H-imidazol-4(5H)-one (creatinine) in the presence of sodium acetate in acetic acid under microwave irradiation. The compound was crystallized from methyl alcohol. This aldol condensation reaction proceeds by the formation of the E-enolate, as per the Zimmerman-Traxler model (Zimmerman & Traxler, 1957). The molecular structure and the atom-numbering scheme are shown in Fig.1. The isatin ring is planar with r.m.s. deviation of 0.0232 (11) Å and the creatinine ring has r.m.s. deviation of 0.0307 (8) Å. with bond distances and angles comparable with those previously reported for other isatin derivatives (Frolova et al., 1988; Usman et al., 2002 and Penthala et al. (2009). The indole and creatinine moieties make a dihedral angle of 60.80 (4) °. Intermolecular O—H···N, N—H···O, N—H···F and O—H···O hydrogen bonds stabilize the crystal structure and form a supramolecular aggregation.