organic compounds
4′-(4-Bromophenyl)-1′-methyldispiro[indan-2,2′-pyrrolidine-3′,2′′-indan]-1,3,1′′-trione
aInstitute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
*Correspondence e-mail: hkfun@usm.my
In the title compound, C27H20BrNO3, the pyrrolidine ring adopts a half-chair conformation, while the other five-membered rings adopt flattened envelope conformations with the spiro C atoms as the flap atoms. An intramolecular C—H⋯O hydrogen bond occurs, generating an S(6) ring. In the crystal, molecules are connected via weak C—H⋯O hydrogen bonds, forming chains along the c axis.
Related literature
For background to tuberculosis, see: Sunduru et al. (2010); Trivedi et al. (2010). For background to anti-tuberculous drugs, see: Moraski et al. (2011); Kumar et al. (2009); Maheswari et al. (2010). For puckering parameters, see: Cremer & Pople (1975). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; 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 and PLATON (Spek, 2009).
Supporting information
10.1107/S1600536811044515/hb6460sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811044515/hb6460Isup2.hkl
A mixture of (E)-2-(4-bromobenzylidene)-2,3-dihydro-1H-indene-1- one (0.001 mmol), ninhydrin (0.001 mmol) and sarcosine (0.002 mmol) (1:1:2) were dissolved in methanol (10 ml) and refluxed for 4 h. After completion of the reaction as evident from TLC, the mixture was poured into crushed ice. The precipitated solid was filtered, washed with water and recrystallised from petroleum ether–ethyl acetate mixture (1:1) to reveal the title compound as yellow blocks.
All hydrogen atoms were positioned geometrically [ C–H = 0.95–1.00 Å] and were refined using a riding model, with Uiso(H) = 1.2 Ueq(C).
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); 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) and PLATON (Spek, 2009).C27H20BrNO3 | F(000) = 992 |
Mr = 486.35 | Dx = 1.510 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 5478 reflections |
a = 7.8392 (1) Å | θ = 2.5–29.8° |
b = 21.5849 (5) Å | µ = 1.95 mm−1 |
c = 12.7823 (3) Å | T = 100 K |
β = 98.422 (1)° | Block, yellow |
V = 2139.55 (8) Å3 | 0.42 × 0.20 × 0.13 mm |
Z = 4 |
Bruker SMART APEXII CCD diffractometer | 6300 independent reflections |
Radiation source: fine-focus sealed tube | 4709 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.036 |
ϕ and ω scans | θmax = 30.2°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −11→11 |
Tmin = 0.492, Tmax = 0.788 | k = −30→21 |
18795 measured reflections | l = −18→18 |
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)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.094 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0387P)2 + 1.0757P] where P = (Fo2 + 2Fc2)/3 |
6300 reflections | (Δ/σ)max < 0.001 |
290 parameters | Δρmax = 0.78 e Å−3 |
0 restraints | Δρmin = −0.72 e Å−3 |
C27H20BrNO3 | V = 2139.55 (8) Å3 |
Mr = 486.35 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 7.8392 (1) Å | µ = 1.95 mm−1 |
b = 21.5849 (5) Å | T = 100 K |
c = 12.7823 (3) Å | 0.42 × 0.20 × 0.13 mm |
β = 98.422 (1)° |
Bruker SMART APEXII CCD diffractometer | 6300 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 4709 reflections with I > 2σ(I) |
Tmin = 0.492, Tmax = 0.788 | Rint = 0.036 |
18795 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 0 restraints |
wR(F2) = 0.094 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.78 e Å−3 |
6300 reflections | Δρmin = −0.72 e Å−3 |
290 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
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 | ||
Br1 | 0.43113 (3) | 0.100889 (10) | 0.065729 (18) | 0.03000 (8) | |
O1 | −0.22936 (19) | −0.10044 (7) | 0.55329 (11) | 0.0260 (3) | |
O2 | −0.0213 (2) | −0.18954 (7) | 0.22339 (11) | 0.0276 (3) | |
O3 | −0.4454 (2) | −0.15915 (7) | 0.21003 (11) | 0.0290 (4) | |
N1 | −0.3407 (2) | −0.04677 (8) | 0.34244 (13) | 0.0215 (4) | |
C1 | 0.2608 (2) | 0.05064 (9) | 0.11634 (15) | 0.0204 (4) | |
C2 | 0.1755 (3) | 0.07378 (10) | 0.19495 (16) | 0.0219 (4) | |
H2A | 0.2049 | 0.1132 | 0.2254 | 0.026* | |
C3 | 0.0460 (3) | 0.03840 (9) | 0.22887 (15) | 0.0203 (4) | |
H3A | −0.0139 | 0.0542 | 0.2826 | 0.024* | |
C4 | 0.0021 (2) | −0.01977 (9) | 0.18553 (14) | 0.0176 (4) | |
C5 | 0.0949 (3) | −0.04220 (9) | 0.10800 (15) | 0.0203 (4) | |
H5A | 0.0685 | −0.0821 | 0.0785 | 0.024* | |
C6 | 0.2249 (3) | −0.00746 (10) | 0.07308 (15) | 0.0222 (4) | |
H6A | 0.2876 | −0.0233 | 0.0207 | 0.027* | |
C7 | −0.1388 (2) | −0.05921 (9) | 0.21992 (15) | 0.0188 (4) | |
H7A | −0.1739 | −0.0898 | 0.1621 | 0.023* | |
C8 | −0.3039 (3) | −0.02450 (10) | 0.23916 (16) | 0.0224 (4) | |
H8A | −0.2846 | 0.0208 | 0.2408 | 0.027* | |
H8B | −0.4008 | −0.0342 | 0.1828 | 0.027* | |
C9 | −0.2654 (2) | −0.10771 (9) | 0.35915 (15) | 0.0185 (4) | |
C10 | −0.0832 (2) | −0.09696 (9) | 0.32268 (15) | 0.0170 (4) | |
C11 | 0.0410 (2) | −0.06671 (9) | 0.41356 (15) | 0.0182 (4) | |
H11A | 0.1157 | −0.0356 | 0.3859 | 0.022* | |
H11B | −0.0239 | −0.0464 | 0.4650 | 0.022* | |
C12 | 0.1463 (2) | −0.12043 (9) | 0.46402 (15) | 0.0187 (4) | |
C13 | 0.2532 (3) | −0.12312 (11) | 0.56122 (16) | 0.0259 (5) | |
H13A | 0.2694 | −0.0878 | 0.6058 | 0.031* | |
C14 | 0.3353 (3) | −0.17868 (12) | 0.59126 (17) | 0.0320 (5) | |
H14A | 0.4071 | −0.1812 | 0.6578 | 0.038* | |
C15 | 0.3152 (3) | −0.23066 (12) | 0.52644 (18) | 0.0316 (5) | |
H15A | 0.3717 | −0.2682 | 0.5495 | 0.038* | |
C16 | 0.2136 (3) | −0.22802 (10) | 0.42880 (17) | 0.0259 (4) | |
H16A | 0.2018 | −0.2629 | 0.3830 | 0.031* | |
C17 | 0.1288 (2) | −0.17243 (9) | 0.39946 (15) | 0.0192 (4) | |
C18 | 0.0067 (2) | −0.15870 (9) | 0.30345 (15) | 0.0193 (4) | |
C19 | −0.2491 (2) | −0.13185 (10) | 0.47401 (15) | 0.0203 (4) | |
C20 | −0.2659 (2) | −0.20008 (10) | 0.46840 (15) | 0.0193 (4) | |
C21 | −0.2248 (3) | −0.24379 (10) | 0.54822 (16) | 0.0235 (4) | |
H21A | −0.1788 | −0.2315 | 0.6180 | 0.028* | |
C22 | −0.2525 (3) | −0.30551 (11) | 0.52318 (17) | 0.0270 (5) | |
H22A | −0.2236 | −0.3362 | 0.5761 | 0.032* | |
C23 | −0.3230 (3) | −0.32353 (10) | 0.42047 (18) | 0.0274 (5) | |
H23A | −0.3429 | −0.3662 | 0.4053 | 0.033* | |
C24 | −0.3641 (3) | −0.28024 (10) | 0.34061 (17) | 0.0247 (4) | |
H24A | −0.4117 | −0.2926 | 0.2711 | 0.030* | |
C25 | −0.3334 (2) | −0.21820 (10) | 0.36564 (15) | 0.0202 (4) | |
C26 | −0.3611 (3) | −0.16237 (10) | 0.29702 (15) | 0.0214 (4) | |
C27 | −0.5213 (3) | −0.04025 (11) | 0.35822 (17) | 0.0282 (5) | |
H27A | −0.5346 | −0.0545 | 0.4294 | 0.042* | |
H27B | −0.5946 | −0.0652 | 0.3056 | 0.042* | |
H27C | −0.5556 | 0.0034 | 0.3503 | 0.042* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.02737 (12) | 0.02655 (12) | 0.03979 (13) | 0.00148 (9) | 0.01733 (9) | 0.00830 (10) |
O1 | 0.0272 (8) | 0.0313 (8) | 0.0191 (7) | −0.0046 (7) | 0.0025 (6) | −0.0031 (6) |
O2 | 0.0340 (9) | 0.0244 (8) | 0.0241 (7) | −0.0011 (7) | 0.0026 (6) | −0.0056 (6) |
O3 | 0.0289 (8) | 0.0354 (9) | 0.0200 (7) | −0.0075 (7) | −0.0057 (6) | 0.0027 (6) |
N1 | 0.0155 (8) | 0.0263 (9) | 0.0232 (8) | 0.0029 (7) | 0.0047 (7) | 0.0042 (7) |
C1 | 0.0166 (9) | 0.0225 (10) | 0.0228 (10) | 0.0027 (8) | 0.0052 (7) | 0.0073 (8) |
C2 | 0.0239 (10) | 0.0184 (10) | 0.0240 (10) | 0.0013 (8) | 0.0056 (8) | 0.0018 (8) |
C3 | 0.0213 (10) | 0.0209 (10) | 0.0203 (9) | 0.0041 (8) | 0.0079 (8) | 0.0013 (8) |
C4 | 0.0163 (9) | 0.0194 (9) | 0.0164 (8) | 0.0026 (7) | 0.0001 (7) | 0.0046 (7) |
C5 | 0.0214 (10) | 0.0198 (10) | 0.0192 (9) | 0.0039 (8) | 0.0012 (8) | 0.0005 (8) |
C6 | 0.0223 (10) | 0.0253 (10) | 0.0199 (9) | 0.0067 (8) | 0.0061 (8) | 0.0020 (8) |
C7 | 0.0169 (9) | 0.0202 (10) | 0.0187 (9) | 0.0002 (8) | 0.0009 (7) | 0.0021 (7) |
C8 | 0.0166 (10) | 0.0268 (11) | 0.0236 (10) | 0.0014 (8) | 0.0021 (8) | 0.0071 (8) |
C9 | 0.0180 (9) | 0.0207 (10) | 0.0163 (9) | −0.0016 (8) | 0.0009 (7) | 0.0013 (7) |
C10 | 0.0150 (9) | 0.0180 (9) | 0.0177 (8) | −0.0012 (7) | 0.0011 (7) | 0.0015 (7) |
C11 | 0.0164 (9) | 0.0186 (10) | 0.0191 (9) | −0.0025 (7) | 0.0010 (7) | −0.0015 (7) |
C12 | 0.0140 (9) | 0.0244 (10) | 0.0178 (9) | −0.0021 (8) | 0.0024 (7) | 0.0024 (8) |
C13 | 0.0187 (10) | 0.0400 (13) | 0.0190 (10) | −0.0028 (9) | 0.0027 (8) | −0.0010 (9) |
C14 | 0.0204 (11) | 0.0530 (16) | 0.0223 (11) | 0.0053 (10) | 0.0017 (8) | 0.0125 (10) |
C15 | 0.0246 (11) | 0.0371 (13) | 0.0341 (12) | 0.0091 (10) | 0.0077 (9) | 0.0167 (10) |
C16 | 0.0248 (11) | 0.0234 (11) | 0.0313 (11) | 0.0036 (9) | 0.0095 (9) | 0.0064 (9) |
C17 | 0.0150 (9) | 0.0223 (10) | 0.0209 (9) | −0.0006 (8) | 0.0048 (7) | 0.0044 (8) |
C18 | 0.0182 (9) | 0.0185 (9) | 0.0215 (9) | −0.0037 (8) | 0.0039 (8) | 0.0010 (8) |
C19 | 0.0142 (9) | 0.0274 (11) | 0.0191 (9) | −0.0038 (8) | 0.0022 (7) | 0.0016 (8) |
C20 | 0.0128 (9) | 0.0251 (10) | 0.0197 (9) | −0.0036 (8) | 0.0011 (7) | 0.0011 (8) |
C21 | 0.0188 (10) | 0.0320 (12) | 0.0189 (9) | −0.0050 (8) | 0.0001 (8) | 0.0042 (8) |
C22 | 0.0212 (10) | 0.0300 (12) | 0.0288 (11) | −0.0023 (9) | 0.0009 (9) | 0.0075 (9) |
C23 | 0.0208 (10) | 0.0233 (11) | 0.0374 (12) | −0.0034 (8) | 0.0020 (9) | −0.0006 (9) |
C24 | 0.0188 (10) | 0.0297 (11) | 0.0247 (10) | −0.0044 (9) | 0.0005 (8) | −0.0030 (9) |
C25 | 0.0161 (9) | 0.0249 (10) | 0.0194 (9) | −0.0039 (8) | 0.0019 (7) | 0.0018 (8) |
C26 | 0.0177 (9) | 0.0260 (11) | 0.0198 (9) | −0.0037 (8) | 0.0010 (8) | 0.0005 (8) |
C27 | 0.0194 (10) | 0.0368 (13) | 0.0293 (11) | 0.0021 (9) | 0.0066 (8) | 0.0039 (10) |
Br1—C1 | 1.906 (2) | C11—H11A | 0.9900 |
O1—C19 | 1.210 (2) | C11—H11B | 0.9900 |
O2—C18 | 1.214 (2) | C12—C17 | 1.388 (3) |
O3—C26 | 1.209 (2) | C12—C13 | 1.394 (3) |
N1—C9 | 1.445 (3) | C13—C14 | 1.389 (3) |
N1—C27 | 1.466 (3) | C13—H13A | 0.9500 |
N1—C8 | 1.473 (3) | C14—C15 | 1.390 (4) |
C1—C2 | 1.379 (3) | C14—H14A | 0.9500 |
C1—C6 | 1.383 (3) | C15—C16 | 1.380 (3) |
C2—C3 | 1.390 (3) | C15—H15A | 0.9500 |
C2—H2A | 0.9500 | C16—C17 | 1.396 (3) |
C3—C4 | 1.395 (3) | C16—H16A | 0.9500 |
C3—H3A | 0.9500 | C17—C18 | 1.472 (3) |
C4—C5 | 1.399 (3) | C19—C20 | 1.479 (3) |
C4—C7 | 1.510 (3) | C20—C21 | 1.392 (3) |
C5—C6 | 1.390 (3) | C20—C25 | 1.398 (3) |
C5—H5A | 0.9500 | C21—C22 | 1.380 (3) |
C6—H6A | 0.9500 | C21—H21A | 0.9500 |
C7—C8 | 1.546 (3) | C22—C23 | 1.403 (3) |
C7—C10 | 1.553 (3) | C22—H22A | 0.9500 |
C7—H7A | 1.0000 | C23—C24 | 1.387 (3) |
C8—H8A | 0.9900 | C23—H23A | 0.9500 |
C8—H8B | 0.9900 | C24—C25 | 1.390 (3) |
C9—C19 | 1.545 (3) | C24—H24A | 0.9500 |
C9—C26 | 1.553 (3) | C25—C26 | 1.488 (3) |
C9—C10 | 1.583 (3) | C27—H27A | 0.9800 |
C10—C18 | 1.544 (3) | C27—H27B | 0.9800 |
C10—C11 | 1.546 (3) | C27—H27C | 0.9800 |
C11—C12 | 1.512 (3) | ||
C9—N1—C27 | 116.69 (17) | C17—C12—C13 | 119.36 (19) |
C9—N1—C8 | 107.46 (16) | C17—C12—C11 | 111.48 (16) |
C27—N1—C8 | 114.35 (16) | C13—C12—C11 | 129.16 (19) |
C2—C1—C6 | 121.85 (19) | C14—C13—C12 | 118.4 (2) |
C2—C1—Br1 | 118.66 (16) | C14—C13—H13A | 120.8 |
C6—C1—Br1 | 119.48 (15) | C12—C13—H13A | 120.8 |
C1—C2—C3 | 118.85 (19) | C13—C14—C15 | 121.6 (2) |
C1—C2—H2A | 120.6 | C13—C14—H14A | 119.2 |
C3—C2—H2A | 120.6 | C15—C14—H14A | 119.2 |
C2—C3—C4 | 121.30 (18) | C16—C15—C14 | 120.4 (2) |
C2—C3—H3A | 119.4 | C16—C15—H15A | 119.8 |
C4—C3—H3A | 119.4 | C14—C15—H15A | 119.8 |
C3—C4—C5 | 118.01 (18) | C15—C16—C17 | 117.9 (2) |
C3—C4—C7 | 122.69 (18) | C15—C16—H16A | 121.1 |
C5—C4—C7 | 119.30 (18) | C17—C16—H16A | 121.1 |
C6—C5—C4 | 121.49 (19) | C12—C17—C16 | 122.24 (19) |
C6—C5—H5A | 119.3 | C12—C17—C18 | 109.19 (17) |
C4—C5—H5A | 119.3 | C16—C17—C18 | 128.53 (19) |
C1—C6—C5 | 118.46 (18) | O2—C18—C17 | 127.45 (19) |
C1—C6—H6A | 120.8 | O2—C18—C10 | 125.27 (18) |
C5—C6—H6A | 120.8 | C17—C18—C10 | 107.28 (16) |
C4—C7—C8 | 115.99 (17) | O1—C19—C20 | 126.71 (18) |
C4—C7—C10 | 114.55 (15) | O1—C19—C9 | 126.11 (19) |
C8—C7—C10 | 104.92 (15) | C20—C19—C9 | 107.17 (16) |
C4—C7—H7A | 106.9 | C21—C20—C25 | 120.93 (19) |
C8—C7—H7A | 106.9 | C21—C20—C19 | 129.02 (18) |
C10—C7—H7A | 106.9 | C25—C20—C19 | 110.05 (17) |
N1—C8—C7 | 105.26 (15) | C22—C21—C20 | 118.20 (19) |
N1—C8—H8A | 110.7 | C22—C21—H21A | 120.9 |
C7—C8—H8A | 110.7 | C20—C21—H21A | 120.9 |
N1—C8—H8B | 110.7 | C21—C22—C23 | 120.8 (2) |
C7—C8—H8B | 110.7 | C21—C22—H22A | 119.6 |
H8A—C8—H8B | 108.8 | C23—C22—H22A | 119.6 |
N1—C9—C19 | 115.00 (16) | C24—C23—C22 | 121.3 (2) |
N1—C9—C26 | 117.37 (16) | C24—C23—H23A | 119.4 |
C19—C9—C26 | 101.32 (15) | C22—C23—H23A | 119.4 |
N1—C9—C10 | 100.95 (15) | C23—C24—C25 | 117.79 (19) |
C19—C9—C10 | 112.11 (15) | C23—C24—H24A | 121.1 |
C26—C9—C10 | 110.47 (16) | C25—C24—H24A | 121.1 |
C18—C10—C11 | 103.44 (15) | C24—C25—C20 | 120.99 (19) |
C18—C10—C7 | 113.34 (16) | C24—C25—C26 | 129.75 (18) |
C11—C10—C7 | 118.79 (16) | C20—C25—C26 | 109.26 (18) |
C18—C10—C9 | 111.89 (15) | O3—C26—C25 | 126.98 (19) |
C11—C10—C9 | 109.65 (15) | O3—C26—C9 | 125.77 (19) |
C7—C10—C9 | 99.93 (14) | C25—C26—C9 | 107.22 (15) |
C12—C11—C10 | 103.93 (16) | N1—C27—H27A | 109.5 |
C12—C11—H11A | 111.0 | N1—C27—H27B | 109.5 |
C10—C11—H11A | 111.0 | H27A—C27—H27B | 109.5 |
C12—C11—H11B | 111.0 | N1—C27—H27C | 109.5 |
C10—C11—H11B | 111.0 | H27A—C27—H27C | 109.5 |
H11A—C11—H11B | 109.0 | H27B—C27—H27C | 109.5 |
C6—C1—C2—C3 | −2.2 (3) | C14—C15—C16—C17 | −1.9 (3) |
Br1—C1—C2—C3 | 177.23 (14) | C13—C12—C17—C16 | 0.6 (3) |
C1—C2—C3—C4 | 0.5 (3) | C11—C12—C17—C16 | −179.99 (19) |
C2—C3—C4—C5 | 1.2 (3) | C13—C12—C17—C18 | 178.51 (18) |
C2—C3—C4—C7 | −179.53 (18) | C11—C12—C17—C18 | −2.1 (2) |
C3—C4—C5—C6 | −1.2 (3) | C15—C16—C17—C12 | 1.2 (3) |
C7—C4—C5—C6 | 179.50 (17) | C15—C16—C17—C18 | −176.3 (2) |
C2—C1—C6—C5 | 2.2 (3) | C12—C17—C18—O2 | 168.6 (2) |
Br1—C1—C6—C5 | −177.24 (14) | C16—C17—C18—O2 | −13.7 (3) |
C4—C5—C6—C1 | −0.4 (3) | C12—C17—C18—C10 | −11.8 (2) |
C3—C4—C7—C8 | 40.8 (2) | C16—C17—C18—C10 | 165.9 (2) |
C5—C4—C7—C8 | −139.97 (18) | C11—C10—C18—O2 | −160.17 (19) |
C3—C4—C7—C10 | −81.7 (2) | C7—C10—C18—O2 | −30.2 (3) |
C5—C4—C7—C10 | 97.5 (2) | C9—C10—C18—O2 | 81.9 (2) |
C9—N1—C8—C7 | −25.6 (2) | C11—C10—C18—C17 | 20.3 (2) |
C27—N1—C8—C7 | −156.81 (17) | C7—C10—C18—C17 | 150.23 (16) |
C4—C7—C8—N1 | −131.75 (17) | C9—C10—C18—C17 | −97.69 (18) |
C10—C7—C8—N1 | −4.3 (2) | N1—C9—C19—O1 | −29.7 (3) |
C27—N1—C9—C19 | −65.1 (2) | C26—C9—C19—O1 | −157.37 (19) |
C8—N1—C9—C19 | 164.97 (16) | C10—C9—C19—O1 | 84.8 (2) |
C27—N1—C9—C26 | 53.9 (2) | N1—C9—C19—C20 | 149.06 (16) |
C8—N1—C9—C26 | −76.0 (2) | C26—C9—C19—C20 | 21.41 (19) |
C27—N1—C9—C10 | 174.03 (16) | C10—C9—C19—C20 | −96.38 (18) |
C8—N1—C9—C10 | 44.09 (18) | O1—C19—C20—C21 | −16.3 (3) |
C4—C7—C10—C18 | −83.5 (2) | C9—C19—C20—C21 | 164.93 (19) |
C8—C7—C10—C18 | 148.17 (16) | O1—C19—C20—C25 | 163.7 (2) |
C4—C7—C10—C11 | 38.2 (2) | C9—C19—C20—C25 | −15.0 (2) |
C8—C7—C10—C11 | −90.1 (2) | C25—C20—C21—C22 | −0.1 (3) |
C4—C7—C10—C9 | 157.30 (16) | C19—C20—C21—C22 | 180.0 (2) |
C8—C7—C10—C9 | 28.97 (18) | C20—C21—C22—C23 | −1.0 (3) |
N1—C9—C10—C18 | −164.44 (15) | C21—C22—C23—C24 | 1.1 (3) |
C19—C9—C10—C18 | 72.7 (2) | C22—C23—C24—C25 | −0.1 (3) |
C26—C9—C10—C18 | −39.5 (2) | C23—C24—C25—C20 | −1.0 (3) |
N1—C9—C10—C11 | 81.38 (17) | C23—C24—C25—C26 | 178.8 (2) |
C19—C9—C10—C11 | −41.5 (2) | C21—C20—C25—C24 | 1.1 (3) |
C26—C9—C10—C11 | −153.72 (15) | C19—C20—C25—C24 | −178.89 (18) |
N1—C9—C10—C7 | −44.19 (17) | C21—C20—C25—C26 | −178.72 (18) |
C19—C9—C10—C7 | −167.09 (16) | C19—C20—C25—C26 | 1.3 (2) |
C26—C9—C10—C7 | 80.71 (17) | C24—C25—C26—O3 | 14.7 (4) |
C18—C10—C11—C12 | −20.64 (19) | C20—C25—C26—O3 | −165.4 (2) |
C7—C10—C11—C12 | −147.24 (17) | C24—C25—C26—C9 | −166.9 (2) |
C9—C10—C11—C12 | 98.86 (17) | C20—C25—C26—C9 | 13.0 (2) |
C10—C11—C12—C17 | 14.9 (2) | N1—C9—C26—O3 | 31.6 (3) |
C10—C11—C12—C13 | −165.8 (2) | C19—C9—C26—O3 | 157.7 (2) |
C17—C12—C13—C14 | −1.7 (3) | C10—C9—C26—O3 | −83.3 (2) |
C11—C12—C13—C14 | 179.1 (2) | N1—C9—C26—C25 | −146.80 (17) |
C12—C13—C14—C15 | 0.9 (3) | C19—C9—C26—C25 | −20.7 (2) |
C13—C14—C15—C16 | 0.9 (3) | C10—C9—C26—C25 | 98.26 (18) |
D—H···A | D—H | H···A | D···A | D—H···A |
C11—H11B···O1 | 0.99 | 2.40 | 3.053 (2) | 123 |
C15—H15A···O2i | 0.95 | 2.44 | 3.163 (3) | 133 |
C22—H22A···O3i | 0.95 | 2.57 | 3.225 (3) | 126 |
Symmetry code: (i) x+1/2, −y−1/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C27H20BrNO3 |
Mr | 486.35 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 100 |
a, b, c (Å) | 7.8392 (1), 21.5849 (5), 12.7823 (3) |
β (°) | 98.422 (1) |
V (Å3) | 2139.55 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.95 |
Crystal size (mm) | 0.42 × 0.20 × 0.13 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.492, 0.788 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 18795, 6300, 4709 |
Rint | 0.036 |
(sin θ/λ)max (Å−1) | 0.708 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.094, 1.02 |
No. of reflections | 6300 |
No. of parameters | 290 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.78, −0.72 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C11—H11B···O1 | 0.99 | 2.40 | 3.053 (2) | 123 |
C15—H15A···O2i | 0.95 | 2.44 | 3.163 (3) | 133 |
C22—H22A···O3i | 0.95 | 2.57 | 3.225 (3) | 126 |
Symmetry code: (i) x+1/2, −y−1/2, z+1/2. |
Footnotes
‡Thomson Reuters ResearcherID: A-3561-2009.
Acknowledgements
ACW, MAA and RI thank the Pharmacogenetic and Novel Therapeutic Research, Institute for Research in Molecular Medicine, Universiti of Sains Malaysia, Penang. This work was funded through Research Grant No. RUC (1001/PSK/8620012). HKF and MH thank the Malaysian Government and Universiti Sains Malaysia for the Research University Grant No. 1001/PFIZIK/811160. MH also thanks Universiti Sains Malaysia for a post-doctoral research fellowship.
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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.
Tuberculosis (TB) is one of the most common chronic infections caused by Mycobacterium tuberculosis and is the world's second common cause of death from infectious diseases after AIDS (Sunduru et al., 2010). Among HIV infected patients, TB is the leading killer epidemic. About 2 million people living with HIV/AIDS die from TB every year (Trivedi et al., 2010). To make things even worse, the emergence of multiple drug resistant TB (MDR-TB), extensively drug resistant TB (XDR-TB) and extremely drug resistant TB (XXDR-TB) are on the rise (Moraski et al., 2011). These lead to the need for development of more potent drugs of new structures and with novel mechanisms of action (Trivedi et al., 2010). In our study, spiro nuclei were used as the core structure due to their potential antimycobacterial properties. Some studies have shown that many of these compounds displayed comparable or even better activities than some of the first-line TB drugs (Kumar et al., 2009; Maheswari et al., 2010).
The asymmetric unit of the title compound is shown in Fig. 1. The pyrrolidine ring (N1/C7–C10) is twisted about the C9–C10 bond, with puckering parameters (Cremer & Pople, 1975) Q = 0.449 (2) Å and f = 317.8 (3)°, and adopting a half-chair conformation. The two five- membered carbocyclic rings, C9/C19,C20/C25,C26 and C10–C12/C17–C18, are in envelope conformations: puckering parameters Q = 0.222 (2) Å and f = 182.7 (5)° with atom C9 at the flap; and Q = 0.216 (2) Å and f = 4.9 (5)° with atom C10 at the flap, respectively.
In the crystal packing, (Fig. 2), the molecules are connected via weak intermolecular C—H···O (Table 1) hydrogen bonds, forming one-dimensional chains along the c-axis.