Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536809051885/sj2692sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536809051885/sj2692Isup2.hkl |
CCDC reference: 766762
Key indicators
- Single-crystal X-ray study
- T = 100 K
- Mean (C-C) = 0.003 Å
- R factor = 0.049
- wR factor = 0.118
- Data-to-parameter ratio = 12.2
checkCIF/PLATON results
No syntax errors found
Alert level B PLAT420_ALERT_2_B D-H Without Acceptor O4 - H1O4 ... ?
Alert level C SHFSU01_ALERT_2_C Test not performed. _refine_ls_shift/su_max and _refine_ls_shift/esd_max not present. Absolute value of the parameter shift to su ratio given 0.001 PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 9 PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L= 0.600 2
Alert level G REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 30.00 From the CIF: _reflns_number_total 3142 Count of symmetry unique reflns 3153 Completeness (_total/calc) 99.65% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 0 Fraction of Friedel pairs measured 0.000 Are heavy atom types Z>Si present no PLAT960_ALERT_3_G Number of Intensities with I .LT. - 2*sig(I) .. 1 PLAT380_ALERT_4_G Check Incorrectly? Oriented X(sp2)-Methyl Moiety C17 PLAT720_ALERT_4_G Number of Unusual/Non-Standard Labels .......... 4
0 ALERT level A = In general: serious problem 1 ALERT level B = Potentially serious problem 3 ALERT level C = Check and explain 4 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 2 ALERT type 2 Indicator that the structure model may be wrong or deficient 2 ALERT type 3 Indicator that the structure quality may be low 4 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
The air-dried and pulverized root of A. monophylla (6.0 kg) was exhaustively extracted with methylene chloride (2 × 20 l for one week) at room temperature. Removal of the solvent from the methylene chloride extract under reduced pressure gave a yellow viscous residue (52.5 g) which was subjected to quick column chromatography over silica gel using solvents of increasing polarity from n-hexane through EtOAc. The eluents were separated into 18 fractions (F1–F18) on the basis of TLC analysis. Fraction F12 (4.3 g) was further separated by quick column chromatography (QCC) with a gradient of acetone-hexane to afford 6 subfractions (12 A-12 F). Subfraction 12 C (385.0 mg) was further purified by QCC with a gradient of acetone-hexane to give the title compound (22.0 mg). Brown plate-shaped single crystals of the title compound suitable for X-ray structure determination were recrystallized from CHCl3/CH3OH (9:1, v/v) after several days, m.p. 518–520 K.
All H atoms were positioned geometrically and allowed to ride on their parent atoms, with d(O—H) = 0.82 Å, d(N—H) = 0.86 Å and d(C—H) = 0.93 Å for aromatic and CH, 0.97 for CH2 and 0.96 Å for CH3 atoms. The Uiso values were constrained to be 1.5Ueq of the carrier atom for hydroxy and methyl H atoms and 1.2Ueq for the remaining H atoms. A rotating group model was used for the methyl groups. The highest residual electron density peak is located at 0.68 Å from C5 and the deepest hole is located at 1.28 Å from C10. A total of 2260 Friedel pairs were merged before final refinement as there is no large anomalous dispersion for the determination of the absolute configuration.
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); 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).
C23H25NO4 | Dx = 1.348 Mg m−3 |
Mr = 379.44 | Melting point = 518–520 K |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 3142 reflections |
a = 5.0650 (1) Å | θ = 1.6–30.0° |
b = 15.0131 (4) Å | µ = 0.09 mm−1 |
c = 24.5813 (5) Å | T = 100 K |
V = 1869.20 (7) Å3 | Plate, brown |
Z = 4 | 0.40 × 0.21 × 0.04 mm |
F(000) = 808 |
Bruker APEXII CCD area-detector diffractometer | 3142 independent reflections |
Radiation source: sealed tube | 2525 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.041 |
ϕ and ω scans | θmax = 30.0°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −6→7 |
Tmin = 0.964, Tmax = 0.996 | k = −21→15 |
17852 measured reflections | l = −34→34 |
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)] = 0.049 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.118 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0588P)2 + 0.5624P] where P = (Fo2 + 2Fc2)/3 |
3142 reflections | (Δ/σ)max < 0.001 |
257 parameters | Δρmax = 0.30 e Å−3 |
0 restraints | Δρmin = −0.26 e Å−3 |
C23H25NO4 | V = 1869.20 (7) Å3 |
Mr = 379.44 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 5.0650 (1) Å | µ = 0.09 mm−1 |
b = 15.0131 (4) Å | T = 100 K |
c = 24.5813 (5) Å | 0.40 × 0.21 × 0.04 mm |
Bruker APEXII CCD area-detector diffractometer | 3142 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 2525 reflections with I > 2σ(I) |
Tmin = 0.964, Tmax = 0.996 | Rint = 0.041 |
17852 measured reflections |
R[F2 > 2σ(F2)] = 0.049 | 0 restraints |
wR(F2) = 0.118 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.30 e Å−3 |
3142 reflections | Δρmin = −0.26 e Å−3 |
257 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 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 | ||
O1 | 0.3340 (3) | 0.33730 (11) | 0.16280 (7) | 0.0193 (4) | |
H1O1 | 0.4552 | 0.3307 | 0.1845 | 0.029* | |
O2 | 0.7218 (3) | 0.37946 (11) | 0.22404 (6) | 0.0183 (4) | |
O3 | 0.9035 (4) | 0.77231 (10) | 0.22808 (6) | 0.0187 (4) | |
H1O3 | 1.0112 | 0.8067 | 0.2415 | 0.028* | |
O4 | −0.0692 (3) | 0.56738 (12) | 0.05943 (7) | 0.0220 (4) | |
H1O4 | −0.1545 | 0.5244 | 0.0487 | 0.026* | |
N1 | 0.6177 (4) | 0.64068 (12) | 0.18267 (8) | 0.0150 (4) | |
H1N1 | 0.6002 | 0.6956 | 0.1734 | 0.018* | |
C1 | 0.1293 (5) | 0.44831 (15) | 0.11046 (9) | 0.0149 (5) | |
C2 | 0.3171 (5) | 0.42414 (15) | 0.14846 (9) | 0.0148 (5) | |
C3 | 0.4888 (4) | 0.48744 (14) | 0.17270 (9) | 0.0137 (4) | |
C4 | 0.6867 (5) | 0.46079 (15) | 0.21169 (9) | 0.0141 (4) | |
C5 | 0.8434 (5) | 0.53044 (15) | 0.23695 (9) | 0.0152 (5) | |
C6 | 1.0356 (5) | 0.51065 (15) | 0.27656 (9) | 0.0193 (5) | |
H6A | 1.0648 | 0.4519 | 0.2868 | 0.023* | |
C7 | 1.1794 (5) | 0.57750 (17) | 0.29992 (10) | 0.0226 (5) | |
H7A | 1.3061 | 0.5639 | 0.3260 | 0.027* | |
C8 | 1.1368 (5) | 0.66664 (16) | 0.28480 (9) | 0.0198 (5) | |
H8A | 1.2342 | 0.7116 | 0.3014 | 0.024* | |
C9 | 0.9534 (5) | 0.68805 (15) | 0.24586 (9) | 0.0159 (5) | |
C10 | 0.8024 (5) | 0.61953 (15) | 0.22133 (9) | 0.0147 (4) | |
C11 | 0.4593 (4) | 0.57851 (14) | 0.15804 (9) | 0.0143 (4) | |
C12 | 0.2707 (5) | 0.60543 (15) | 0.11958 (9) | 0.0149 (5) | |
C13 | 0.1139 (5) | 0.53968 (15) | 0.09674 (9) | 0.0167 (5) | |
C14 | 0.2242 (5) | 0.70302 (15) | 0.10646 (10) | 0.0176 (5) | |
H14A | 0.0747 | 0.7072 | 0.0819 | 0.021* | |
H14B | 0.1765 | 0.7336 | 0.1398 | 0.021* | |
C15 | 0.4547 (5) | 0.75103 (16) | 0.08107 (9) | 0.0185 (5) | |
H15A | 0.5447 | 0.7210 | 0.0537 | 0.022* | |
C16 | 0.5433 (5) | 0.83205 (16) | 0.09377 (10) | 0.0214 (5) | |
C17 | 0.7643 (6) | 0.87496 (19) | 0.06275 (13) | 0.0337 (7) | |
H17A | 0.8238 | 0.8353 | 0.0347 | 0.051* | |
H17B | 0.9077 | 0.8877 | 0.0871 | 0.051* | |
H17C | 0.7028 | 0.9294 | 0.0466 | 0.051* | |
C18 | 0.4340 (6) | 0.88750 (17) | 0.13926 (11) | 0.0284 (6) | |
H18A | 0.2903 | 0.8564 | 0.1562 | 0.043* | |
H18B | 0.3717 | 0.9432 | 0.1250 | 0.043* | |
H18C | 0.5700 | 0.8984 | 0.1656 | 0.043* | |
C19 | −0.0597 (5) | 0.38065 (15) | 0.08666 (9) | 0.0179 (5) | |
H19A | −0.0638 | 0.3287 | 0.1101 | 0.022* | |
H19B | −0.2358 | 0.4060 | 0.0862 | 0.022* | |
C20 | 0.0113 (5) | 0.35141 (15) | 0.02980 (9) | 0.0190 (5) | |
H20A | 0.1620 | 0.3164 | 0.0266 | 0.023* | |
C21 | −0.1154 (5) | 0.36960 (16) | −0.01649 (10) | 0.0219 (5) | |
C22 | −0.0143 (7) | 0.3355 (2) | −0.07035 (10) | 0.0323 (7) | |
H22A | 0.1369 | 0.2982 | −0.0643 | 0.049* | |
H22B | 0.0349 | 0.3850 | −0.0929 | 0.049* | |
H22C | −0.1502 | 0.3017 | −0.0880 | 0.049* | |
C23 | −0.3584 (6) | 0.4259 (2) | −0.02118 (12) | 0.0333 (6) | |
H23A | −0.4316 | 0.4356 | 0.0143 | 0.050* | |
H23B | −0.4859 | 0.3961 | −0.0436 | 0.050* | |
H23C | −0.3134 | 0.4821 | −0.0373 | 0.050* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0209 (8) | 0.0137 (8) | 0.0235 (8) | −0.0020 (7) | −0.0046 (7) | 0.0007 (7) |
O2 | 0.0205 (8) | 0.0100 (7) | 0.0243 (8) | −0.0001 (7) | −0.0030 (7) | 0.0012 (7) |
O3 | 0.0236 (9) | 0.0098 (7) | 0.0227 (8) | −0.0018 (7) | −0.0055 (7) | −0.0001 (6) |
O4 | 0.0206 (8) | 0.0205 (8) | 0.0251 (9) | −0.0028 (8) | −0.0084 (7) | 0.0007 (7) |
N1 | 0.0153 (9) | 0.0083 (9) | 0.0214 (9) | 0.0004 (8) | −0.0029 (8) | 0.0009 (7) |
C1 | 0.0155 (10) | 0.0137 (10) | 0.0155 (10) | −0.0026 (9) | 0.0010 (9) | −0.0029 (9) |
C2 | 0.0167 (11) | 0.0107 (10) | 0.0169 (11) | −0.0015 (9) | 0.0031 (9) | −0.0020 (9) |
C3 | 0.0143 (10) | 0.0110 (9) | 0.0158 (10) | −0.0010 (9) | 0.0004 (9) | −0.0014 (8) |
C4 | 0.0147 (10) | 0.0133 (10) | 0.0141 (10) | 0.0009 (9) | −0.0006 (9) | −0.0013 (9) |
C5 | 0.0169 (11) | 0.0121 (10) | 0.0164 (10) | −0.0003 (9) | 0.0003 (9) | −0.0013 (9) |
C6 | 0.0255 (12) | 0.0112 (10) | 0.0213 (12) | 0.0022 (10) | −0.0066 (10) | 0.0013 (9) |
C7 | 0.0264 (13) | 0.0179 (11) | 0.0236 (12) | 0.0013 (11) | −0.0108 (11) | 0.0011 (10) |
C8 | 0.0246 (12) | 0.0135 (11) | 0.0211 (12) | −0.0040 (10) | −0.0063 (10) | −0.0031 (9) |
C9 | 0.0194 (11) | 0.0113 (10) | 0.0170 (11) | −0.0017 (9) | 0.0008 (10) | −0.0021 (9) |
C10 | 0.0152 (10) | 0.0144 (10) | 0.0145 (10) | 0.0006 (9) | 0.0003 (9) | −0.0003 (9) |
C11 | 0.0125 (10) | 0.0115 (9) | 0.0190 (11) | −0.0019 (9) | 0.0013 (9) | −0.0006 (9) |
C12 | 0.0161 (10) | 0.0099 (10) | 0.0186 (11) | 0.0000 (9) | −0.0008 (9) | 0.0011 (9) |
C13 | 0.0159 (11) | 0.0176 (11) | 0.0167 (10) | 0.0012 (10) | 0.0006 (9) | 0.0014 (9) |
C14 | 0.0154 (11) | 0.0121 (10) | 0.0252 (12) | −0.0004 (9) | −0.0036 (10) | 0.0024 (9) |
C15 | 0.0200 (11) | 0.0174 (11) | 0.0181 (11) | 0.0026 (10) | −0.0021 (9) | 0.0023 (9) |
C16 | 0.0192 (11) | 0.0191 (11) | 0.0258 (12) | −0.0022 (10) | −0.0084 (10) | 0.0073 (10) |
C17 | 0.0237 (13) | 0.0263 (14) | 0.0510 (18) | −0.0056 (13) | −0.0017 (14) | 0.0111 (13) |
C18 | 0.0376 (15) | 0.0150 (11) | 0.0326 (14) | −0.0031 (12) | −0.0083 (13) | −0.0037 (11) |
C19 | 0.0172 (11) | 0.0155 (10) | 0.0211 (11) | −0.0045 (10) | −0.0004 (9) | 0.0005 (9) |
C20 | 0.0202 (11) | 0.0148 (10) | 0.0220 (12) | −0.0034 (10) | 0.0012 (10) | −0.0033 (9) |
C21 | 0.0283 (13) | 0.0170 (11) | 0.0205 (12) | −0.0085 (11) | 0.0017 (11) | −0.0007 (10) |
C22 | 0.0453 (17) | 0.0313 (14) | 0.0204 (13) | −0.0074 (15) | 0.0010 (13) | −0.0022 (11) |
C23 | 0.0268 (14) | 0.0446 (17) | 0.0287 (14) | −0.0006 (14) | −0.0086 (12) | 0.0017 (13) |
O1—C2 | 1.353 (3) | C12—C14 | 1.519 (3) |
O1—H1O1 | 0.8200 | C14—C15 | 1.508 (3) |
O2—C4 | 1.271 (3) | C14—H14A | 0.9700 |
O3—C9 | 1.362 (3) | C14—H14B | 0.9700 |
O3—H1O3 | 0.8200 | C15—C16 | 1.334 (3) |
O4—C13 | 1.369 (3) | C15—H15A | 0.9300 |
O4—H1O4 | 0.8200 | C16—C17 | 1.500 (4) |
N1—C10 | 1.371 (3) | C16—C18 | 1.500 (4) |
N1—C11 | 1.372 (3) | C17—H17A | 0.9600 |
N1—H1N1 | 0.8600 | C17—H17B | 0.9600 |
C1—C2 | 1.381 (3) | C17—H17C | 0.9600 |
C1—C13 | 1.415 (3) | C18—H18A | 0.9600 |
C1—C19 | 1.514 (3) | C18—H18B | 0.9600 |
C2—C3 | 1.419 (3) | C18—H18C | 0.9600 |
C3—C11 | 1.422 (3) | C19—C20 | 1.508 (3) |
C3—C4 | 1.443 (3) | C19—H19A | 0.9700 |
C4—C5 | 1.452 (3) | C19—H19B | 0.9700 |
C5—C10 | 1.407 (3) | C20—C21 | 1.335 (3) |
C5—C6 | 1.408 (3) | C20—H20A | 0.9300 |
C6—C7 | 1.366 (3) | C21—C23 | 1.497 (4) |
C6—H6A | 0.9300 | C21—C22 | 1.509 (3) |
C7—C8 | 1.406 (3) | C22—H22A | 0.9600 |
C7—H7A | 0.9300 | C22—H22B | 0.9600 |
C8—C9 | 1.372 (3) | C22—H22C | 0.9600 |
C8—H8A | 0.9300 | C23—H23A | 0.9600 |
C9—C10 | 1.417 (3) | C23—H23B | 0.9600 |
C11—C12 | 1.404 (3) | C23—H23C | 0.9600 |
C12—C13 | 1.386 (3) | ||
C2—O1—H1O1 | 109.5 | C12—C14—H14A | 108.4 |
C9—O3—H1O3 | 109.5 | C15—C14—H14B | 108.4 |
C13—O4—H1O4 | 109.5 | C12—C14—H14B | 108.4 |
C10—N1—C11 | 123.20 (19) | H14A—C14—H14B | 107.5 |
C10—N1—H1N1 | 118.4 | C16—C15—C14 | 126.8 (2) |
C11—N1—H1N1 | 118.4 | C16—C15—H15A | 116.6 |
C2—C1—C13 | 117.0 (2) | C14—C15—H15A | 116.6 |
C2—C1—C19 | 121.4 (2) | C15—C16—C17 | 121.6 (3) |
C13—C1—C19 | 121.6 (2) | C15—C16—C18 | 123.8 (2) |
O1—C2—C1 | 118.2 (2) | C17—C16—C18 | 114.6 (2) |
O1—C2—C3 | 119.8 (2) | C16—C17—H17A | 109.5 |
C1—C2—C3 | 122.0 (2) | C16—C17—H17B | 109.5 |
C2—C3—C11 | 118.2 (2) | H17A—C17—H17B | 109.5 |
C2—C3—C4 | 121.2 (2) | C16—C17—H17C | 109.5 |
C11—C3—C4 | 120.5 (2) | H17A—C17—H17C | 109.5 |
O2—C4—C3 | 121.5 (2) | H17B—C17—H17C | 109.5 |
O2—C4—C5 | 120.9 (2) | C16—C18—H18A | 109.5 |
C3—C4—C5 | 117.64 (19) | C16—C18—H18B | 109.5 |
C10—C5—C6 | 119.4 (2) | H18A—C18—H18B | 109.5 |
C10—C5—C4 | 119.1 (2) | C16—C18—H18C | 109.5 |
C6—C5—C4 | 121.4 (2) | H18A—C18—H18C | 109.5 |
C7—C6—C5 | 120.3 (2) | H18B—C18—H18C | 109.5 |
C7—C6—H6A | 119.9 | C20—C19—C1 | 113.73 (19) |
C5—C6—H6A | 119.9 | C20—C19—H19A | 108.8 |
C6—C7—C8 | 120.4 (2) | C1—C19—H19A | 108.8 |
C6—C7—H7A | 119.8 | C20—C19—H19B | 108.8 |
C8—C7—H7A | 119.8 | C1—C19—H19B | 108.8 |
C9—C8—C7 | 120.8 (2) | H19A—C19—H19B | 107.7 |
C9—C8—H8A | 119.6 | C21—C20—C19 | 128.0 (2) |
C7—C8—H8A | 119.6 | C21—C20—H20A | 116.0 |
O3—C9—C8 | 124.5 (2) | C19—C20—H20A | 116.0 |
O3—C9—C10 | 116.0 (2) | C20—C21—C23 | 125.2 (2) |
C8—C9—C10 | 119.5 (2) | C20—C21—C22 | 121.0 (2) |
N1—C10—C5 | 120.7 (2) | C23—C21—C22 | 113.8 (2) |
N1—C10—C9 | 119.7 (2) | C21—C22—H22A | 109.5 |
C5—C10—C9 | 119.6 (2) | C21—C22—H22B | 109.5 |
N1—C11—C12 | 119.97 (19) | H22A—C22—H22B | 109.5 |
N1—C11—C3 | 118.7 (2) | C21—C22—H22C | 109.5 |
C12—C11—C3 | 121.3 (2) | H22A—C22—H22C | 109.5 |
C13—C12—C11 | 117.3 (2) | H22B—C22—H22C | 109.5 |
C13—C12—C14 | 120.8 (2) | C21—C23—H23A | 109.5 |
C11—C12—C14 | 121.8 (2) | C21—C23—H23B | 109.5 |
O4—C13—C12 | 116.3 (2) | H23A—C23—H23B | 109.5 |
O4—C13—C1 | 119.5 (2) | C21—C23—H23C | 109.5 |
C12—C13—C1 | 124.2 (2) | H23A—C23—H23C | 109.5 |
C15—C14—C12 | 115.4 (2) | H23B—C23—H23C | 109.5 |
C15—C14—H14A | 108.4 | ||
C13—C1—C2—O1 | 179.2 (2) | O3—C9—C10—C5 | 179.3 (2) |
C19—C1—C2—O1 | 2.1 (3) | C8—C9—C10—C5 | −0.4 (3) |
C13—C1—C2—C3 | −0.3 (3) | C10—N1—C11—C12 | 178.7 (2) |
C19—C1—C2—C3 | −177.5 (2) | C10—N1—C11—C3 | −0.6 (3) |
O1—C2—C3—C11 | −177.9 (2) | C2—C3—C11—N1 | 177.7 (2) |
C1—C2—C3—C11 | 1.7 (3) | C4—C3—C11—N1 | −1.7 (3) |
O1—C2—C3—C4 | 1.4 (3) | C2—C3—C11—C12 | −1.7 (3) |
C1—C2—C3—C4 | −179.0 (2) | C4—C3—C11—C12 | 179.0 (2) |
C2—C3—C4—O2 | 3.0 (3) | N1—C11—C12—C13 | −179.0 (2) |
C11—C3—C4—O2 | −177.7 (2) | C3—C11—C12—C13 | 0.3 (3) |
C2—C3—C4—C5 | −176.4 (2) | N1—C11—C12—C14 | −3.6 (3) |
C11—C3—C4—C5 | 2.9 (3) | C3—C11—C12—C14 | 175.7 (2) |
O2—C4—C5—C10 | 178.7 (2) | C11—C12—C13—O4 | 179.85 (19) |
C3—C4—C5—C10 | −2.0 (3) | C14—C12—C13—O4 | 4.4 (3) |
O2—C4—C5—C6 | −1.2 (3) | C11—C12—C13—C1 | 1.2 (3) |
C3—C4—C5—C6 | 178.2 (2) | C14—C12—C13—C1 | −174.3 (2) |
C10—C5—C6—C7 | 0.5 (4) | C2—C1—C13—O4 | −179.8 (2) |
C4—C5—C6—C7 | −179.6 (2) | C19—C1—C13—O4 | −2.7 (3) |
C5—C6—C7—C8 | 0.1 (4) | C2—C1—C13—C12 | −1.2 (3) |
C6—C7—C8—C9 | −0.9 (4) | C19—C1—C13—C12 | 176.0 (2) |
C7—C8—C9—O3 | −178.7 (2) | C13—C12—C14—C15 | −120.8 (2) |
C7—C8—C9—C10 | 1.0 (4) | C11—C12—C14—C15 | 64.0 (3) |
C11—N1—C10—C5 | 1.6 (3) | C12—C14—C15—C16 | −136.1 (2) |
C11—N1—C10—C9 | −178.3 (2) | C14—C15—C16—C17 | −175.8 (2) |
C6—C5—C10—N1 | 179.6 (2) | C14—C15—C16—C18 | 4.2 (4) |
C4—C5—C10—N1 | −0.2 (3) | C2—C1—C19—C20 | −103.0 (3) |
C6—C5—C10—C9 | −0.4 (3) | C13—C1—C19—C20 | 79.9 (3) |
C4—C5—C10—C9 | 179.7 (2) | C1—C19—C20—C21 | −110.2 (3) |
O3—C9—C10—N1 | −0.7 (3) | C19—C20—C21—C23 | 1.2 (4) |
C8—C9—C10—N1 | 179.6 (2) | C19—C20—C21—C22 | 179.3 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O1···O2 | 0.82 | 1.82 | 2.554 (2) | 149 |
O3—H1O3···O2i | 0.82 | 1.93 | 2.752 (2) | 175 |
N1—H1N1···O3 | 0.86 | 2.34 | 2.692 (3) | 105 |
C14—H14A···O4 | 0.97 | 2.29 | 2.773 (3) | 110 |
C19—H19A···O1 | 0.97 | 2.40 | 2.811 (3) | 105 |
Symmetry code: (i) −x+2, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C23H25NO4 |
Mr | 379.44 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 100 |
a, b, c (Å) | 5.0650 (1), 15.0131 (4), 24.5813 (5) |
V (Å3) | 1869.20 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.40 × 0.21 × 0.04 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.964, 0.996 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17852, 3142, 2525 |
Rint | 0.041 |
(sin θ/λ)max (Å−1) | 0.703 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.049, 0.118, 1.03 |
No. of reflections | 3142 |
No. of parameters | 257 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.30, −0.26 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O1···O2 | 0.82 | 1.82 | 2.554 (2) | 149 |
O3—H1O3···O2i | 0.82 | 1.93 | 2.752 (2) | 175 |
N1—H1N1···O3 | 0.86 | 2.34 | 2.692 (3) | 105 |
C14—H14A···O4 | 0.97 | 2.29 | 2.773 (3) | 110 |
C19—H19A···O1 | 0.97 | 2.40 | 2.811 (3) | 105 |
Symmetry code: (i) −x+2, y+1/2, −z+1/2. |
Acridone alkaloids display a variety of biological activities such as antiproliferative (Kawii et al., 1999a), induction of human promyelocytic leukemia cell (HL-60) differentiation (Kawii et al., 1999b) and cancer chemopreventive activities (Itoigawa et al., 2003). The title acridone alkaloid (I) known as atalaphylline (Basu & Basa, 1972) was isolated from Atalantia monophylla Corrêa, known locally in Thai as Manao Phi, a mangrove plant which was collected from Trang province in the southern part of Thailand. We previously reported the crystal structure of N-methylataphyllinine, an acridone alkaloid which was isolated from the same plant (Chukaew et al., 2007). As part of our research on the crystal structures of natural product compounds from Thai medicinal plants, the molecular and crystal structure of the title acridone alkaloid was investigated and is reported here.
The title molecule (Fig. 1) has a three-fused planar rings with an r.m.s. deviation of 0.026 (2) Å. The pyridine ring makes the dihedral angles of 1.82 (11) and 1.14 (11)° with the C1–C3/C11–C13 and C5–C10 benzene rings, respectively. All the three hydroxyl groups are co-planar with the attached benzene rings. All C atoms of each of the 3-methylbut-2-enyl substituents lie on the same plane with r.m.s. deviations of 0.018 (2) and 0.004 (3)Å for the C14/C15/C16/C17/C18 and C19/C20/C21/C22/C23 planes, respectively. These two planes make dihedral angles of 88.55 (13) (for the 3-methylbut-2-enyl unit at atom C1) and 69.66 (13)° (for the 3-methylbut-2-enyl unit at atom C12) with the C1–C3/C11–C13 benzene ring. The torsion angles C2–C1–C19–C20 and C13–C12–C14–C15 are -103.0 (3) and -120.8 (2)°, indicating an (-)anti-clinal conformation of both the 3-methylbut-2-enyl units. An intramolecular N—H···O hydrogen bond generates an S(5) ring while an intramolecular O—H···O hydrogen bond generates an S(6) ring motif (Bernstein et al., 1995); these help to maintain the planarity of the acridone skeleton. The bond lengths in (I) are within normal ranges (Allen et al., 1987) and comparable with those found in a related structure (Chukaew et al., 2007).
In the crystal packing (Fig. 2), the molecules are linked into screw chains along the [0 1 0] direction by O3—H1O3···O2 hydrogen bonds (Table 1). These chains are stacked along the a axis (Fig. 2) by π···π interactions with distances Cg1···Cg2 = 3.6696 (13) Å and Cg2···Cg3 = 3.6695 (13) Å (symmetry codes for the interactions: 1 + x, y, z and -1 + x, y, z respectively); Cg1, Cg2 and Cg3 are the centroids of C3–C5/C10–C11/N1, C1–C3/C11–C13 and C5–C10 rings, respectively.