supplementary materials
Loureirin A
The asymmetric unit of the title compound [systematic name: 3-(2,4-dimethoxyphenyl)-1-(4-hydroxyphenyl)propan-1-one], C17H18O4, contains two independent molecules; these have different conformations with respect to the relative orientation of the aromatic ring planes. The dihedral angles formed by the dimethoxyphenyl and hydroxyphenyl rings in the two molecules are 19.61 (10) and 66.37 (9)°. In the crystal structure, intermolecular O-H
O hydrogen-bonding interactions link the molecules into one-dimensional chains running parallel to the c axis.
The title compound was extracted according to the literature method (Zhou et al., 2001) from the herb Sanguis draxonis. Colourless block-shaped crystals suitable for X-ray analysis were obtained by slow evaporation of as DMF:water (1:1 v/v) solution at 298 K over a period of one month.
The hydroxy and aromatic H atoms were located in a difference Fourier map and refined freely with Uiso(H) = 1.2Ueq(C, O). The methyl H atoms were constrained to an ideal geometry with C—H = 0.96 Å and Uiso(H) = 1.5Ueq(C), but each group was allowed to rotate freely about its C—C bond. The methylene H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms with C—H = 0.97 Å and Uiso(H) = 1.2Ueq(C).
Data collection: DENZO (Otwinowski & Minor, 1997); cell refinement: SCALEPACK (Otwinowski & Minor, 1997); data reduction: SCALEPACK; program(s) used to solve structure: SHELXS97 (Sheldrick, 1990); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2001); software used to prepare material for publication: SHELXL97.
3-(2,4-dimethoxyphenyl)-1-(4-hydroxyphenyl)propan-1-one
top
Crystal data top
| C17H18O4 | Z = 4 |
| Mr = 286.31 | F(000) = 608 |
| Triclinic, P1 | Dx = 1.283 Mg m−3 |
| Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
| a = 8.1750 (7) Å | Cell parameters from 5366 reflections |
| b = 12.8971 (8) Å | θ = 2.5–25.6° |
| c = 15.2410 (6) Å | µ = 0.09 mm−1 |
| α = 73.509 (10)° | T = 295 K |
| β = 86.259 (12)° | Block, colourless |
| γ = 74.206 (10)° | 0.20 × 0.20 × 0.10 mm |
| V = 1482.5 (2) Å3 | |
Data collection top
MAC DIP 2030K diffractometer | 3408 reflections with I > 2σ(I) |
| Radiation source: rotating anode | Rint = 0.049 |
| graphite | θmax = 25.6°, θmin = 2.5° |
| Detector resolution: 0 pixels mm-1 | h = −9→9 |
| ω scans | k = −14→15 |
| 10182 measured reflections | l = −18→18 |
| 5366 independent reflections | |
Refinement top
| 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)] = 0.057 | Hydrogen site location: inferred from neighbouring sites |
| wR(F2) = 0.189 | H atoms treated by a mixture of independent and constrained refinement |
| S = 1.02 | w = 1/[σ2(Fo2) + (0.1025P)2 + 0.2205P] where P = (Fo2 + 2Fc2)/3 |
| 5366 reflections | (Δ/σ)max < 0.001 |
| 431 parameters | Δρmax = 0.29 e Å−3 |
| 3 restraints | Δρmin = −0.20 e Å−3 |
Crystal data top
| C17H18O4 | γ = 74.206 (10)° |
| Mr = 286.31 | V = 1482.5 (2) Å3 |
| Triclinic, P1 | Z = 4 |
| a = 8.1750 (7) Å | Mo Kα radiation |
| b = 12.8971 (8) Å | µ = 0.09 mm−1 |
| c = 15.2410 (6) Å | T = 295 K |
| α = 73.509 (10)° | 0.20 × 0.20 × 0.10 mm |
| β = 86.259 (12)° | |
Data collection top
MAC DIP 2030K diffractometer | 3408 reflections with I > 2σ(I) |
| 10182 measured reflections | Rint = 0.049 |
| 5366 independent reflections | θmax = 25.6° |
Refinement top
| R[F2 > 2σ(F2)] = 0.057 | H atoms treated by a mixture of independent and constrained refinement |
| wR(F2) = 0.189 | Δρmax = 0.29 e Å−3 |
| S = 1.02 | Δρmin = −0.20 e Å−3 |
| 5366 reflections | Absolute structure: ? |
| 431 parameters | Flack parameter: ? |
| 3 restraints | Rogers parameter: ? |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top| | x | y | z | Uiso*/Ueq | |
| O1 | 0.8504 (3) | −0.0889 (2) | 0.31936 (15) | 0.0893 (8) | |
| H1A | 0.895 (6) | −0.045 (4) | 0.282 (3) | 0.134* | |
| O2 | 0.6352 (4) | −0.05071 (19) | 0.71439 (14) | 0.0959 (8) | |
| O3 | 0.7430 (3) | 0.34222 (18) | 0.52269 (14) | 0.0849 (7) | |
| O4 | 0.5812 (3) | 0.64527 (17) | 0.65600 (14) | 0.0780 (6) | |
| C1 | 0.8119 (4) | −0.0571 (3) | 0.39738 (19) | 0.0663 (8) | |
| C2 | 0.7716 (4) | −0.1363 (3) | 0.4721 (2) | 0.0675 (8) | |
| H2A | 0.769 (4) | −0.208 (3) | 0.463 (2) | 0.081* | |
| C3 | 0.7254 (4) | −0.1091 (2) | 0.5530 (2) | 0.0663 (8) | |
| H3A | 0.694 (4) | −0.162 (3) | 0.604 (2) | 0.080* | |
| C4 | 0.7268 (4) | −0.0048 (2) | 0.56262 (19) | 0.0663 (8) | |
| C5 | 0.7722 (5) | 0.0726 (3) | 0.4876 (2) | 0.0778 (9) | |
| H5A | 0.780 (4) | 0.149 (3) | 0.493 (2) | 0.093* | |
| C6 | 0.8117 (5) | 0.0463 (3) | 0.4060 (2) | 0.0763 (9) | |
| H6A | 0.839 (4) | 0.098 (3) | 0.358 (2) | 0.092* | |
| C7 | 0.6835 (5) | 0.0173 (3) | 0.6527 (2) | 0.0793 (9) | |
| C8 | 0.7015 (5) | 0.1266 (3) | 0.6695 (2) | 0.0869 (10) | |
| H8A | 0.7163 | 0.1159 | 0.7344 | 0.104* | |
| H8B | 0.8000 | 0.1467 | 0.6379 | 0.104* | |
| C9 | 0.5417 (5) | 0.2186 (3) | 0.6340 (2) | 0.0843 (9) | |
| H9A | 0.4440 | 0.1993 | 0.6672 | 0.101* | |
| H9B | 0.5248 | 0.2270 | 0.5697 | 0.101* | |
| C10 | 0.5596 (4) | 0.3302 (3) | 0.6468 (2) | 0.0768 (9) | |
| C11 | 0.4803 (5) | 0.3731 (3) | 0.7163 (2) | 0.0816 (10) | |
| H11A | 0.417 (5) | 0.333 (3) | 0.759 (2) | 0.098* | |
| C12 | 0.4845 (4) | 0.4774 (3) | 0.7244 (2) | 0.0697 (8) | |
| H12A | 0.431 (4) | 0.499 (3) | 0.776 (2) | 0.084* | |
| C13 | 0.5740 (4) | 0.5393 (2) | 0.65944 (18) | 0.0604 (7) | |
| C14 | 0.6624 (4) | 0.4961 (3) | 0.59190 (19) | 0.0624 (7) | |
| H14A | 0.719 (4) | 0.542 (3) | 0.550 (2) | 0.075* | |
| C15 | 0.6579 (4) | 0.3920 (3) | 0.58686 (19) | 0.0677 (8) | |
| C16 | 0.8440 (5) | 0.3992 (3) | 0.4582 (2) | 0.0955 (11) | |
| H16A | 0.8976 | 0.3537 | 0.4189 | 0.143* | |
| H16B | 0.9295 | 0.4137 | 0.4898 | 0.143* | |
| H16C | 0.7734 | 0.4689 | 0.4222 | 0.143* | |
| C17 | 0.4891 (5) | 0.6949 (3) | 0.7225 (2) | 0.0896 (11) | |
| H17A | 0.5032 | 0.7689 | 0.7123 | 0.134* | |
| H17B | 0.5311 | 0.6500 | 0.7825 | 0.134* | |
| H17C | 0.3707 | 0.6994 | 0.7177 | 0.134* | |
| O1A | 0.4963 (3) | 1.16103 (19) | 1.12874 (15) | 0.0815 (7) | |
| H1B | 0.468 (6) | 1.120 (4) | 1.172 (3) | 0.122* | |
| O2A | 0.9855 (2) | 0.99444 (15) | 0.83152 (12) | 0.0637 (5) | |
| O3A | 1.2335 (3) | 0.58212 (16) | 0.97268 (12) | 0.0666 (5) | |
| O4A | 1.0914 (3) | 0.32784 (16) | 0.83785 (14) | 0.0760 (6) | |
| C1A | 0.5971 (4) | 1.1025 (2) | 1.07499 (18) | 0.0584 (7) | |
| C2A | 0.6605 (4) | 1.1639 (2) | 0.9963 (2) | 0.0664 (8) | |
| H2B | 0.628 (4) | 1.240 (3) | 0.981 (2) | 0.080* | |
| C3A | 0.7646 (4) | 1.1097 (2) | 0.93961 (19) | 0.0613 (7) | |
| H3B | 0.807 (4) | 1.154 (3) | 0.888 (2) | 0.074* | |
| C4A | 0.8053 (3) | 0.9935 (2) | 0.95884 (16) | 0.0519 (6) | |
| C5A | 0.7388 (4) | 0.9331 (2) | 1.03753 (17) | 0.0564 (7) | |
| H5B | 0.773 (4) | 0.853 (3) | 1.0537 (18) | 0.068* | |
| C6A | 0.6373 (4) | 0.9868 (2) | 1.09567 (18) | 0.0587 (7) | |
| H6B | 0.592 (4) | 0.944 (2) | 1.1526 (19) | 0.070* | |
| C7A | 0.9191 (3) | 0.9379 (2) | 0.89583 (17) | 0.0534 (6) | |
| C8A | 0.9471 (4) | 0.8144 (2) | 0.90919 (18) | 0.0589 (7) | |
| H8C | 0.8383 | 0.7991 | 0.9059 | 0.071* | |
| H8D | 0.9951 | 0.7742 | 0.9698 | 0.071* | |
| C9A | 1.0642 (4) | 0.7713 (2) | 0.83885 (18) | 0.0620 (7) | |
| H9C | 1.0288 | 0.8217 | 0.7787 | 0.074* | |
| H9D | 1.1784 | 0.7735 | 0.8503 | 0.074* | |
| C10A | 1.0694 (3) | 0.6541 (2) | 0.83781 (17) | 0.0550 (7) | |
| C11A | 0.9883 (4) | 0.6345 (2) | 0.76959 (18) | 0.0618 (7) | |
| H11B | 0.925 (4) | 0.699 (3) | 0.722 (2) | 0.074* | |
| C12A | 0.9910 (4) | 0.5275 (2) | 0.76584 (19) | 0.0599 (7) | |
| H12B | 0.928 (4) | 0.518 (2) | 0.719 (2) | 0.072* | |
| C13A | 1.0773 (4) | 0.4372 (2) | 0.83321 (17) | 0.0574 (7) | |
| C14A | 1.1586 (4) | 0.4520 (2) | 0.90420 (18) | 0.0570 (7) | |
| H14B | 1.217 (4) | 0.389 (3) | 0.9520 (19) | 0.068* | |
| C15A | 1.1545 (3) | 0.5599 (2) | 0.90622 (16) | 0.0519 (6) | |
| C16A | 1.3028 (4) | 0.4903 (3) | 1.04937 (19) | 0.0733 (8) | |
| H16D | 1.3500 | 0.5166 | 1.0923 | 0.110* | |
| H16E | 1.3905 | 0.4357 | 1.0293 | 0.110* | |
| H16F | 1.2147 | 0.4566 | 1.0782 | 0.110* | |
| C17A | 1.0131 (6) | 0.3063 (3) | 0.7664 (2) | 0.0924 (11) | |
| H17D | 1.0336 | 0.2268 | 0.7768 | 0.139* | |
| H17E | 1.0601 | 0.3374 | 0.7086 | 0.139* | |
| H17F | 0.8928 | 0.3401 | 0.7655 | 0.139* | |
Atomic displacement parameters (Å2) top| | U11 | U22 | U33 | U12 | U13 | U23 |
| O1 | 0.1167 (19) | 0.0998 (18) | 0.0703 (14) | −0.0473 (15) | 0.0337 (13) | −0.0426 (13) |
| O2 | 0.118 (2) | 0.0785 (15) | 0.0748 (13) | −0.0372 (15) | 0.0304 (14) | −0.0242 (11) |
| O3 | 0.1130 (18) | 0.0782 (14) | 0.0746 (13) | −0.0331 (13) | 0.0349 (13) | −0.0389 (11) |
| O4 | 0.0961 (16) | 0.0659 (13) | 0.0831 (13) | −0.0318 (12) | 0.0251 (12) | −0.0335 (11) |
| C1 | 0.0682 (18) | 0.072 (2) | 0.0625 (16) | −0.0219 (15) | 0.0137 (14) | −0.0250 (14) |
| C2 | 0.083 (2) | 0.0628 (18) | 0.0662 (17) | −0.0297 (16) | 0.0144 (15) | −0.0250 (14) |
| C3 | 0.082 (2) | 0.0545 (17) | 0.0628 (16) | −0.0264 (15) | 0.0137 (15) | −0.0119 (13) |
| C4 | 0.080 (2) | 0.0550 (16) | 0.0636 (16) | −0.0191 (14) | 0.0125 (15) | −0.0170 (13) |
| C5 | 0.109 (3) | 0.0528 (17) | 0.0726 (18) | −0.0291 (17) | 0.0264 (18) | −0.0175 (15) |
| C6 | 0.099 (2) | 0.0647 (19) | 0.0604 (17) | −0.0256 (17) | 0.0238 (17) | −0.0112 (14) |
| C7 | 0.099 (2) | 0.0748 (19) | 0.0734 (19) | −0.0200 (17) | 0.0268 (18) | −0.0228 (16) |
| C8 | 0.101 (3) | 0.086 (2) | 0.0711 (19) | −0.018 (2) | 0.0080 (18) | −0.0226 (17) |
| C9 | 0.081 (2) | 0.076 (3) | 0.0724 (19) | −0.0160 (19) | 0.0010 (17) | −0.0250 (18) |
| C10 | 0.087 (2) | 0.0630 (19) | 0.088 (2) | −0.0130 (16) | 0.0184 (18) | −0.0231 (16) |
| C11 | 0.100 (2) | 0.067 (2) | 0.083 (2) | −0.0328 (18) | 0.0380 (19) | −0.0268 (17) |
| C12 | 0.079 (2) | 0.0667 (19) | 0.0702 (18) | −0.0232 (16) | 0.0210 (16) | −0.0307 (15) |
| C13 | 0.0681 (18) | 0.0556 (16) | 0.0599 (15) | −0.0184 (13) | 0.0074 (13) | −0.0194 (13) |
| C14 | 0.0677 (18) | 0.0640 (18) | 0.0591 (15) | −0.0223 (14) | 0.0059 (14) | −0.0189 (13) |
| C15 | 0.078 (2) | 0.0697 (19) | 0.0620 (16) | −0.0219 (15) | 0.0143 (15) | −0.0290 (14) |
| C16 | 0.110 (3) | 0.100 (3) | 0.079 (2) | −0.029 (2) | 0.033 (2) | −0.036 (2) |
| C17 | 0.115 (3) | 0.065 (2) | 0.092 (2) | −0.0213 (19) | 0.033 (2) | −0.0362 (18) |
| O1A | 0.1072 (18) | 0.0697 (14) | 0.0769 (14) | −0.0298 (13) | 0.0361 (13) | −0.0369 (11) |
| O2A | 0.0785 (13) | 0.0529 (11) | 0.0602 (10) | −0.0220 (9) | 0.0176 (9) | −0.0155 (9) |
| O3A | 0.0773 (13) | 0.0637 (12) | 0.0616 (11) | −0.0219 (10) | 0.0006 (9) | −0.0186 (9) |
| O4A | 0.1073 (17) | 0.0479 (11) | 0.0773 (13) | −0.0210 (11) | −0.0013 (11) | −0.0235 (10) |
| C1A | 0.0665 (17) | 0.0570 (16) | 0.0572 (14) | −0.0181 (13) | 0.0074 (13) | −0.0240 (12) |
| C2A | 0.087 (2) | 0.0434 (15) | 0.0725 (17) | −0.0185 (15) | 0.0161 (15) | −0.0238 (13) |
| C3A | 0.0778 (19) | 0.0455 (15) | 0.0631 (16) | −0.0210 (13) | 0.0066 (14) | −0.0156 (12) |
| C4A | 0.0604 (15) | 0.0437 (14) | 0.0518 (13) | −0.0146 (12) | 0.0011 (11) | −0.0127 (11) |
| C5A | 0.0694 (17) | 0.0450 (14) | 0.0528 (14) | −0.0155 (13) | 0.0048 (12) | −0.0108 (11) |
| C6A | 0.0664 (17) | 0.0540 (16) | 0.0563 (14) | −0.0182 (13) | 0.0083 (13) | −0.0157 (12) |
| C7A | 0.0582 (15) | 0.0478 (14) | 0.0541 (13) | −0.0159 (12) | 0.0000 (12) | −0.0121 (11) |
| C8A | 0.0657 (17) | 0.0482 (15) | 0.0648 (15) | −0.0161 (13) | 0.0127 (13) | −0.0203 (12) |
| C9A | 0.0787 (19) | 0.0484 (15) | 0.0606 (15) | −0.0200 (14) | 0.0144 (14) | −0.0178 (12) |
| C10A | 0.0653 (16) | 0.0462 (14) | 0.0528 (14) | −0.0142 (12) | 0.0169 (12) | −0.0166 (11) |
| C11A | 0.0764 (19) | 0.0529 (16) | 0.0507 (14) | −0.0118 (14) | 0.0081 (13) | −0.0126 (12) |
| C12A | 0.0727 (19) | 0.0578 (17) | 0.0535 (14) | −0.0195 (14) | 0.0037 (13) | −0.0207 (13) |
| C13A | 0.0731 (18) | 0.0466 (14) | 0.0555 (14) | −0.0193 (13) | 0.0161 (13) | −0.0191 (12) |
| C14A | 0.0636 (17) | 0.0468 (15) | 0.0552 (14) | −0.0103 (12) | 0.0100 (13) | −0.0118 (12) |
| C15A | 0.0554 (15) | 0.0523 (15) | 0.0493 (13) | −0.0141 (12) | 0.0113 (11) | −0.0189 (11) |
| C16A | 0.0719 (19) | 0.087 (2) | 0.0608 (16) | −0.0233 (17) | −0.0011 (14) | −0.0180 (15) |
| C17A | 0.133 (3) | 0.069 (2) | 0.093 (2) | −0.041 (2) | 0.007 (2) | −0.0393 (19) |
Geometric parameters (Å, °) top
| O1—C1 | 1.356 (3) | O1A—C1A | 1.358 (3) |
| O1—H1A | 0.82 (4) | O1A—H1B | 0.79 (4) |
| O2—C7 | 1.217 (3) | O2A—C7A | 1.236 (3) |
| O3—C15 | 1.370 (3) | O3A—C15A | 1.370 (3) |
| O3—C16 | 1.415 (4) | O3A—C16A | 1.423 (4) |
| O4—C13 | 1.369 (3) | O4A—C13A | 1.365 (3) |
| O4—C17 | 1.418 (3) | O4A—C17A | 1.426 (4) |
| C1—C6 | 1.375 (4) | C1A—C6A | 1.384 (4) |
| C1—C2 | 1.387 (4) | C1A—C2A | 1.392 (4) |
| C2—C3 | 1.378 (4) | C2A—C3A | 1.373 (4) |
| C2—H2A | 0.98 (3) | C2A—H2B | 0.91 (3) |
| C3—C4 | 1.396 (4) | C3A—C4A | 1.390 (4) |
| C3—H3A | 0.96 (3) | C3A—H3B | 0.94 (3) |
| C4—C5 | 1.393 (4) | C4A—C5A | 1.398 (3) |
| C4—C7 | 1.482 (4) | C4A—C7A | 1.488 (3) |
| C5—C6 | 1.376 (4) | C5A—C6A | 1.375 (4) |
| C5—H5A | 1.03 (3) | C5A—H5B | 0.95 (3) |
| C6—H6A | 0.90 (3) | C6A—H6B | 1.00 (3) |
| C7—C8 | 1.548 (5) | C7A—C8A | 1.501 (3) |
| C8—C9 | 1.514 (5) | C8A—C9A | 1.514 (3) |
| C8—H8A | 0.9700 | C8A—H8C | 0.9700 |
| C8—H8B | 0.9700 | C8A—H8D | 0.9700 |
| C9—C10 | 1.552 (5) | C9A—C10A | 1.506 (3) |
| C9—H9A | 0.9700 | C9A—H9C | 0.9700 |
| C9—H9B | 0.9700 | C9A—H9D | 0.9700 |
| C10—C11 | 1.377 (4) | C10A—C11A | 1.383 (4) |
| C10—C15 | 1.398 (4) | C10A—C15A | 1.400 (4) |
| C11—C12 | 1.395 (4) | C11A—C12A | 1.392 (4) |
| C11—H11A | 0.93 (3) | C11A—H11B | 0.98 (3) |
| C12—C13 | 1.389 (4) | C12A—C13A | 1.370 (4) |
| C12—H12A | 0.94 (3) | C12A—H12B | 0.96 (3) |
| C13—C14 | 1.379 (4) | C13A—C14A | 1.389 (4) |
| C14—C15 | 1.376 (4) | C14A—C15A | 1.392 (4) |
| C14—H14A | 0.93 (3) | C14A—H14B | 0.96 (3) |
| C16—H16A | 0.9600 | C16A—H16D | 0.9600 |
| C16—H16B | 0.9600 | C16A—H16E | 0.9600 |
| C16—H16C | 0.9600 | C16A—H16F | 0.9600 |
| C17—H17A | 0.9600 | C17A—H17D | 0.9600 |
| C17—H17B | 0.9600 | C17A—H17E | 0.9600 |
| C17—H17C | 0.9600 | C17A—H17F | 0.9600 |
| | | |
| C1—O1—H1A | 111 (3) | C1A—O1A—H1B | 110 (3) |
| C15—O3—C16 | 118.8 (2) | C15A—O3A—C16A | 117.1 (2) |
| C13—O4—C17 | 117.5 (2) | C13A—O4A—C17A | 117.5 (2) |
| O1—C1—C6 | 124.3 (3) | O1A—C1A—C6A | 122.7 (2) |
| O1—C1—C2 | 116.1 (3) | O1A—C1A—C2A | 117.2 (2) |
| C6—C1—C2 | 119.6 (3) | C6A—C1A—C2A | 120.1 (2) |
| C3—C2—C1 | 119.6 (3) | C3A—C2A—C1A | 120.1 (3) |
| C3—C2—H2A | 123.0 (18) | C3A—C2A—H2B | 120.1 (19) |
| C1—C2—H2A | 117.3 (18) | C1A—C2A—H2B | 119.8 (19) |
| C2—C3—C4 | 121.1 (3) | C2A—C3A—C4A | 120.7 (2) |
| C2—C3—H3A | 120.4 (18) | C2A—C3A—H3B | 117.1 (18) |
| C4—C3—H3A | 118.5 (18) | C4A—C3A—H3B | 122.2 (18) |
| C5—C4—C3 | 118.4 (3) | C3A—C4A—C5A | 118.6 (2) |
| C5—C4—C7 | 123.2 (3) | C3A—C4A—C7A | 119.0 (2) |
| C3—C4—C7 | 118.4 (2) | C5A—C4A—C7A | 122.4 (2) |
| C6—C5—C4 | 120.1 (3) | C6A—C5A—C4A | 121.0 (3) |
| C6—C5—H5A | 119.3 (18) | C6A—C5A—H5B | 119.6 (16) |
| C4—C5—H5A | 120.6 (18) | C4A—C5A—H5B | 119.1 (16) |
| C1—C6—C5 | 121.2 (3) | C5A—C6A—C1A | 119.6 (2) |
| C1—C6—H6A | 120 (2) | C5A—C6A—H6B | 121.3 (16) |
| C5—C6—H6A | 119 (2) | C1A—C6A—H6B | 119.1 (16) |
| O2—C7—C4 | 120.4 (3) | O2A—C7A—C4A | 119.6 (2) |
| O2—C7—C8 | 119.4 (3) | O2A—C7A—C8A | 120.8 (2) |
| C4—C7—C8 | 120.2 (3) | C4A—C7A—C8A | 119.6 (2) |
| C9—C8—C7 | 108.2 (3) | C7A—C8A—C9A | 113.0 (2) |
| C9—C8—H8A | 110.1 | C7A—C8A—H8C | 109.0 |
| C7—C8—H8A | 110.1 | C9A—C8A—H8C | 109.0 |
| C9—C8—H8B | 110.1 | C7A—C8A—H8D | 109.0 |
| C7—C8—H8B | 110.1 | C9A—C8A—H8D | 109.0 |
| H8A—C8—H8B | 108.4 | H8C—C8A—H8D | 107.8 |
| C8—C9—C10 | 109.1 (3) | C10A—C9A—C8A | 114.8 (2) |
| C8—C9—H9A | 109.9 | C10A—C9A—H9C | 108.6 |
| C10—C9—H9A | 109.9 | C8A—C9A—H9C | 108.6 |
| C8—C9—H9B | 109.9 | C10A—C9A—H9D | 108.6 |
| C10—C9—H9B | 109.9 | C8A—C9A—H9D | 108.6 |
| H9A—C9—H9B | 108.3 | H9C—C9A—H9D | 107.5 |
| C11—C10—C15 | 117.1 (3) | C11A—C10A—C15A | 116.9 (2) |
| C11—C10—C9 | 122.3 (3) | C11A—C10A—C9A | 121.4 (2) |
| C15—C10—C9 | 120.6 (3) | C15A—C10A—C9A | 121.7 (3) |
| C10—C11—C12 | 122.8 (3) | C10A—C11A—C12A | 123.1 (3) |
| C10—C11—H11A | 119 (2) | C10A—C11A—H11B | 118.2 (18) |
| C12—C11—H11A | 118 (2) | C12A—C11A—H11B | 118.7 (18) |
| C13—C12—C11 | 117.9 (3) | C13A—C12A—C11A | 118.4 (3) |
| C13—C12—H12A | 124.9 (19) | C13A—C12A—H12B | 121.4 (18) |
| C11—C12—H12A | 117.1 (19) | C11A—C12A—H12B | 120.1 (18) |
| O4—C13—C14 | 115.2 (2) | O4A—C13A—C12A | 124.7 (3) |
| O4—C13—C12 | 124.2 (2) | O4A—C13A—C14A | 114.4 (3) |
| C14—C13—C12 | 120.6 (3) | C12A—C13A—C14A | 120.9 (3) |
| C15—C14—C13 | 119.9 (3) | C13A—C14A—C15A | 119.6 (3) |
| C15—C14—H14A | 123.2 (19) | C13A—C14A—H14B | 120.8 (17) |
| C13—C14—H14A | 116.8 (19) | C15A—C14A—H14B | 119.6 (17) |
| O3—C15—C14 | 123.8 (2) | O3A—C15A—C14A | 123.5 (2) |
| O3—C15—C10 | 114.8 (3) | O3A—C15A—C10A | 115.4 (2) |
| C14—C15—C10 | 121.3 (3) | C14A—C15A—C10A | 121.1 (3) |
| O3—C16—H16A | 109.5 | O3A—C16A—H16D | 109.5 |
| O3—C16—H16B | 109.5 | O3A—C16A—H16E | 109.5 |
| H16A—C16—H16B | 109.5 | H16D—C16A—H16E | 109.5 |
| O3—C16—H16C | 109.5 | O3A—C16A—H16F | 109.5 |
| H16A—C16—H16C | 109.5 | H16D—C16A—H16F | 109.5 |
| H16B—C16—H16C | 109.5 | H16E—C16A—H16F | 109.5 |
| O4—C17—H17A | 109.5 | O4A—C17A—H17D | 109.5 |
| O4—C17—H17B | 109.5 | O4A—C17A—H17E | 109.5 |
| H17A—C17—H17B | 109.5 | H17D—C17A—H17E | 109.5 |
| O4—C17—H17C | 109.5 | O4A—C17A—H17F | 109.5 |
| H17A—C17—H17C | 109.5 | H17D—C17A—H17F | 109.5 |
| H17B—C17—H17C | 109.5 | H17E—C17A—H17F | 109.5 |
| | | |
| O1—C1—C2—C3 | −177.8 (3) | O1A—C1A—C2A—C3A | 179.3 (3) |
| C6—C1—C2—C3 | 2.5 (5) | C6A—C1A—C2A—C3A | −0.7 (5) |
| C1—C2—C3—C4 | −3.2 (5) | C1A—C2A—C3A—C4A | 1.3 (5) |
| C2—C3—C4—C5 | 1.5 (5) | C2A—C3A—C4A—C5A | −0.5 (4) |
| C2—C3—C4—C7 | −177.2 (3) | C2A—C3A—C4A—C7A | −179.8 (3) |
| C3—C4—C5—C6 | 1.1 (5) | C3A—C4A—C5A—C6A | −0.9 (4) |
| C7—C4—C5—C6 | 179.6 (3) | C7A—C4A—C5A—C6A | 178.4 (3) |
| O1—C1—C6—C5 | −179.6 (3) | C4A—C5A—C6A—C1A | 1.5 (4) |
| C2—C1—C6—C5 | 0.0 (5) | O1A—C1A—C6A—C5A | 179.3 (3) |
| C4—C5—C6—C1 | −1.8 (6) | C2A—C1A—C6A—C5A | −0.7 (4) |
| C5—C4—C7—O2 | 175.7 (4) | C3A—C4A—C7A—O2A | 5.3 (4) |
| C3—C4—C7—O2 | −5.7 (5) | C5A—C4A—C7A—O2A | −174.0 (3) |
| C5—C4—C7—C8 | −5.0 (5) | C3A—C4A—C7A—C8A | −172.6 (3) |
| C3—C4—C7—C8 | 173.6 (3) | C5A—C4A—C7A—C8A | 8.1 (4) |
| O2—C7—C8—C9 | −96.8 (4) | O2A—C7A—C8A—C9A | 1.4 (4) |
| C4—C7—C8—C9 | 83.8 (4) | C4A—C7A—C8A—C9A | 179.3 (2) |
| C7—C8—C9—C10 | −177.9 (3) | C7A—C8A—C9A—C10A | −168.6 (2) |
| C8—C9—C10—C11 | −102.6 (4) | C8A—C9A—C10A—C11A | 105.0 (3) |
| C8—C9—C10—C15 | 77.7 (4) | C8A—C9A—C10A—C15A | −74.2 (3) |
| C15—C10—C11—C12 | 4.8 (6) | C15A—C10A—C11A—C12A | −1.2 (4) |
| C9—C10—C11—C12 | −174.9 (3) | C9A—C10A—C11A—C12A | 179.6 (2) |
| C10—C11—C12—C13 | −0.4 (6) | C10A—C11A—C12A—C13A | 0.4 (4) |
| C17—O4—C13—C14 | 178.5 (3) | C17A—O4A—C13A—C12A | 1.2 (4) |
| C17—O4—C13—C12 | −0.9 (5) | C17A—O4A—C13A—C14A | −179.1 (3) |
| C11—C12—C13—O4 | 176.3 (3) | C11A—C12A—C13A—O4A | −179.6 (2) |
| C11—C12—C13—C14 | −3.1 (5) | C11A—C12A—C13A—C14A | 0.7 (4) |
| O4—C13—C14—C15 | −177.4 (3) | O4A—C13A—C14A—C15A | 179.3 (2) |
| C12—C13—C14—C15 | 2.0 (5) | C12A—C13A—C14A—C15A | −0.9 (4) |
| C16—O3—C15—C14 | 1.0 (5) | C16A—O3A—C15A—C14A | −8.8 (3) |
| C16—O3—C15—C10 | 179.2 (3) | C16A—O3A—C15A—C10A | 172.3 (2) |
| C13—C14—C15—O3 | −179.4 (3) | C13A—C14A—C15A—O3A | −178.8 (2) |
| C13—C14—C15—C10 | 2.6 (5) | C13A—C14A—C15A—C10A | 0.0 (4) |
| C11—C10—C15—O3 | 175.9 (3) | C11A—C10A—C15A—O3A | 180.0 (2) |
| C9—C10—C15—O3 | −4.4 (5) | C9A—C10A—C15A—O3A | −0.8 (3) |
| C11—C10—C15—C14 | −5.9 (5) | C11A—C10A—C15A—C14A | 1.0 (3) |
| C9—C10—C15—C14 | 173.8 (3) | C9A—C10A—C15A—C14A | −179.8 (2) |
Hydrogen-bond geometry (Å, °) top
| D—H···A | D—H | H···A | D···A | D—H···A |
| O1—H1A···O2Ai | 0.82 (4) | 1.96 (4) | 2.733 (3) | 155 (5) |
| O1A—H1B···O2ii | 0.79 (4) | 1.96 (4) | 2.732 (3) | 166 (5) |
| C5—H5A···O3 | 1.03 (3) | 2.60 (4) | 3.609 (4) | 168 (3) |
| C8—H8B···O3 | 0.97 | 2.57 | 3.120 (4) | 116 |
| C8—H8A···O2Aiii | 0.97 | 2.59 | 3.255 (4) | 126 |
| C5A—H5B···O4Aiv | 0.96 (4) | 2.46 (3) | 3.322 (3) | 150 |
| C17A—H17D···O1v | 0.96 | 2.57 | 3.317 (5) | 135 |
| Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y+1, −z+2; (iii) x, y−1, z; (iv) −x+2, −y+1, −z+2; (v) −x+2, −y, −z+1. |
Table 1
Hydrogen-bond geometry (Å, °) top
| D—H···A | D—H | H···A | D···A | D—H···A |
| O1—H1A···O2Ai | 0.82 (4) | 1.96 (4) | 2.733 (3) | 155 (5) |
| O1A—H1B···O2ii | 0.79 (4) | 1.96 (4) | 2.732 (3) | 166 (5) |
| C5—H5A···O3 | 1.03 (3) | 2.60 (4) | 3.609 (4) | 168 (3) |
| C8—H8B···O3 | 0.97 | 2.57 | 3.120 (4) | 116 |
| Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y+1, −z+2. |
We acknowledge the financial support of the International Centre for Diffraction Data, Pennsylvania, USA.
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Otwinowski, Z. & Minor, W. (1997). Methods in Enzymology, Vol. 276, Macromolecular Crystallography, Part A, edited by C. W. Carter Jr & R. M. Sweet, pp. 307–326. New York: Academic Press.
Sheldrick, G. M. (1990). Acta Cryst. A46, 467–473.
Sheldrick, G. M. (1997). SHELXL97. University of Göttingen, Germany.
Spek, A. L. (2001). PLATON. University of Utrecht, The Netherlands.
Zhou, Z. H., Wang, J. L. & Yang, C. R. (2001). Chin. Tradit. Herb. Drugs, 32, 484–486.
We have recently published the crystal structure of loureirin B (Lu et al., 2006). As a continuation of our studies on the components of Sanguis draxonis, we report here the crystal structure of loureirin A, which was crystallized from a DMF:water (1:1 v/v) solution.
In the asymmetric unit of the title compound there are two independent molecules (Fig. 1) with different conformations. The main difference between the two molecules relates to the relative orientation of the aromatic ring planes, as indicated by the dihedral angles formed by the dimethoxyphenyl and hydroxyphenyl rings [19.61 (10) and 66.37 (9)°] and by the values of the C4—C7—C8—C9 torsion angles [83.9 (4) and 179.3 (2)°]. In this orientation, intramolecular C—H···O hydrogen bonds stabilizing the conformation are observed only in one molecule (Table 1). In the crystal packing, the molecules are linked by intermolecular O—H···O hydrogen bonding interactions (Table 1) into one-dimensional chains running parallel to the c axis (Fig. 2).