organic compounds
12-Anilinomethyl-9α-hydroxy-4,8-dimethyl-3,14-dioxatricyclo[9.3.0.02,4]tetradec-7-en-13-one
aLaboratoire de Chimie Bioorganique et Analytique, URAC 22, BP 146, FSTM, Université Hassan II, Mohammedia-Casablanca 20810 Mohammedia, Morocco, bLaboratoire de Chimie des Substances Naturelles, URAC16, Faculté des Sciences Semlalia, BP 2390 Bd My Abdellah, 40000 Marrakech, Morocco, and cUniversité Blaise Pascal, Laboratoire des Matériaux, Inorganiques, UMR CNRS 6002, 24 Avenue des Landais, 63177 Aubière, France
*Correspondence e-mail: abenharref@yahoo.fr
The title compound, C21H27NO4, was synthesized from 9α-hydroxyparthenolide, which was isolated from the chloroform extract of the aerial parts of Anvillea radiata. The contains two independent molecules. In each, the ten-membered ring displays an approximative chair-chair conformation. Each of the five-membered rings adopts a flattened the C(H)—C—C(H) atoms representing the flap lie out of the mean plane through the remaining four atoms by 0.443 (2) and 0.553 (2) Å. The dihedral angle between the least-squares planes through the ten- and five-membered rings in the two molecules are similar [22.54 (17) and 23.39 (14)°]. In the crystal, molecules are linked by O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds.
Related literature
For the isolation and biological activity of 9α-hydroxyparthenolide, see: El Hassany et al. (2004). For the reactivity of this sesquiterpene, see: Castaneda-Acosta et al. (1997); Neukirch et al. (2003); Der-Ren et al. (2006); Neelakantan et al.(2009). For conformations of ten-membered rings, see: Watson & Zabel (1982). For see: Cremer & Pople (1975).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: APEX2 (Bruker, 2005); cell SAINT (Bruker, 2005); 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 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
10.1107/S1600536811015303/tk2738sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811015303/tk2738Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811015303/tk2738Isup3.cml
In a screw capped vial equipped with a magnetic stirrer, ZnCl2 (20 mg, 0.142 mmol) was added to aniline (270 mg, 2.91 mmol) and 9α-hydroxyparthenolide (753 mg, 2.85 mmol) in THF (5 ml). The resulting mixture was left under vigorous stirring at 40 °C for 10 days. The mixture was extracted with AcOEt (2 x 10 ml). The combined organic layers were dried over anhydrous Na2SO4 and concentrated under reduced pressure. of the residue obtained on a column of silica gel eluting with hexane ethyl acetate (85/15) allowed the isolation of pure 9α -hydroxy-4,8-dimethyl-12-phenylaminomethyl-3,14-dioxa-tricyclo [9.3.0.02,4]tetradec-7-en-13-one (508 mg, 1.42 mmol). The title compound was recrystallized from its ethyl acetate solution.
All H atoms were fixed geometrically and treated as riding with O—H = 0.82 Å, N—H = 0.86 Å and C—H = 0.93-0.98 Å, and with Uiso(H) = 1.2Ueq(O, N and C) or Uiso(H) = 1.5Ueq(methyl). In the absence of significant
the could not be reliably determined and thus 3180 Friedel pairs were merged.Data collection: APEX2 (Bruker, 2005); cell
SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999).C21H27NO4 | F(000) = 768 |
Mr = 357.44 | Dx = 1.270 Mg m−3 |
Monoclinic, P21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2yb | Cell parameters from 18901 reflections |
a = 11.1067 (8) Å | θ = 1.9–26.4° |
b = 11.9406 (9) Å | µ = 0.09 mm−1 |
c = 14.6930 (11) Å | T = 298 K |
β = 106.315 (2)° | Prism, colourless |
V = 1870.1 (2) Å3 | 0.27 × 0.18 × 0.12 mm |
Z = 4 |
Bruker X8 APEXII CCD area-detector diffractometer | 3651 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.037 |
Graphite monochromator | θmax = 26.4°, θmin = 1.9° |
ϕ and ω scans | h = −11→13 |
18091 measured reflections | k = −14→13 |
4005 independent reflections | l = −18→18 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.044 | H-atom parameters constrained |
wR(F2) = 0.131 | w = 1/[σ2(Fo2) + (0.1035P)2 + 0.0818P] where P = (Fo2 + 2Fc2)/3 |
S = 1.04 | (Δ/σ)max = 0.001 |
4005 reflections | Δρmax = 0.28 e Å−3 |
474 parameters | Δρmin = −0.28 e Å−3 |
1 restraint | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.026 (4) |
C21H27NO4 | V = 1870.1 (2) Å3 |
Mr = 357.44 | Z = 4 |
Monoclinic, P21 | Mo Kα radiation |
a = 11.1067 (8) Å | µ = 0.09 mm−1 |
b = 11.9406 (9) Å | T = 298 K |
c = 14.6930 (11) Å | 0.27 × 0.18 × 0.12 mm |
β = 106.315 (2)° |
Bruker X8 APEXII CCD area-detector diffractometer | 3651 reflections with I > 2σ(I) |
18091 measured reflections | Rint = 0.037 |
4005 independent reflections |
R[F2 > 2σ(F2)] = 0.044 | 1 restraint |
wR(F2) = 0.131 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.28 e Å−3 |
4005 reflections | Δρmin = −0.28 e Å−3 |
474 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 | ||
C1 | 0.7915 (3) | 0.3012 (3) | 0.74747 (18) | 0.0488 (6) | |
H1 | 0.8127 | 0.2537 | 0.7042 | 0.059* | |
C2 | 0.7993 (3) | 0.2517 (3) | 0.8428 (2) | 0.0614 (8) | |
H2A | 0.7910 | 0.3107 | 0.8860 | 0.074* | |
H2B | 0.8806 | 0.2167 | 0.8682 | 0.074* | |
C3 | 0.6953 (3) | 0.1641 (3) | 0.8353 (2) | 0.0660 (8) | |
H3A | 0.7121 | 0.0987 | 0.8016 | 0.079* | |
H3B | 0.6942 | 0.1409 | 0.8983 | 0.079* | |
C4 | 0.5702 (3) | 0.2127 (3) | 0.78344 (19) | 0.0540 (7) | |
C5 | 0.5359 (3) | 0.2050 (2) | 0.67912 (19) | 0.0476 (6) | |
H5 | 0.5970 | 0.1650 | 0.6544 | 0.057* | |
C6 | 0.4602 (2) | 0.2914 (2) | 0.61274 (18) | 0.0464 (6) | |
H6 | 0.4402 | 0.3543 | 0.6487 | 0.056* | |
C7 | 0.5235 (2) | 0.3342 (2) | 0.53782 (15) | 0.0390 (5) | |
H7 | 0.5775 | 0.2749 | 0.5251 | 0.047* | |
C8 | 0.5993 (3) | 0.4438 (2) | 0.55866 (19) | 0.0506 (6) | |
H8A | 0.5947 | 0.4795 | 0.4985 | 0.061* | |
H8B | 0.5579 | 0.4931 | 0.5929 | 0.061* | |
C9 | 0.7378 (3) | 0.4360 (2) | 0.61507 (18) | 0.0503 (6) | |
H9 | 0.7750 | 0.5102 | 0.6140 | 0.060* | |
C10 | 0.7584 (2) | 0.4040 (2) | 0.71752 (17) | 0.0440 (6) | |
C11 | 0.4094 (2) | 0.3478 (2) | 0.45040 (17) | 0.0423 (5) | |
H11 | 0.3757 | 0.4229 | 0.4547 | 0.051* | |
C12 | 0.3140 (2) | 0.2666 (3) | 0.4665 (2) | 0.0520 (6) | |
C13 | 0.4276 (2) | 0.3389 (2) | 0.35209 (17) | 0.0456 (6) | |
H13A | 0.3464 | 0.3410 | 0.3052 | 0.055* | |
H13B | 0.4757 | 0.4028 | 0.3412 | 0.055* | |
C14 | 0.7369 (3) | 0.4992 (3) | 0.7781 (2) | 0.0616 (8) | |
H14A | 0.6497 | 0.5193 | 0.7593 | 0.092* | |
H14B | 0.7864 | 0.5625 | 0.7702 | 0.092* | |
H14C | 0.7610 | 0.4766 | 0.8434 | 0.092* | |
C30 | 0.7524 (2) | 0.4204 (2) | 0.31645 (16) | 0.0396 (5) | |
H30 | 0.6674 | 0.4398 | 0.3184 | 0.047* | |
C15 | 0.5203 (4) | 0.3023 (4) | 0.8337 (2) | 0.0699 (9) | |
H15A | 0.4433 | 0.3309 | 0.7926 | 0.105* | |
H15B | 0.5805 | 0.3618 | 0.8509 | 0.105* | |
H15C | 0.5049 | 0.2718 | 0.8898 | 0.105* | |
C16 | 0.4981 (2) | 0.2039 (2) | 0.25042 (18) | 0.0445 (5) | |
C17 | 0.5847 (3) | 0.1218 (2) | 0.2441 (2) | 0.0501 (6) | |
H17 | 0.6389 | 0.0930 | 0.2993 | 0.060* | |
C18 | 0.5912 (3) | 0.0826 (3) | 0.1573 (2) | 0.0586 (7) | |
H18 | 0.6491 | 0.0273 | 0.1547 | 0.070* | |
C31 | 0.7456 (2) | 0.3887 (2) | 0.21551 (15) | 0.0392 (5) | |
C19 | 0.5129 (4) | 0.1244 (4) | 0.0742 (2) | 0.0729 (10) | |
H19 | 0.5172 | 0.0979 | 0.0157 | 0.087* | |
C20 | 0.4291 (4) | 0.2054 (4) | 0.0799 (2) | 0.0813 (11) | |
H20 | 0.3763 | 0.2344 | 0.0242 | 0.098* | |
C21 | 0.4198 (3) | 0.2465 (3) | 0.1671 (2) | 0.0617 (8) | |
H21 | 0.3615 | 0.3018 | 0.1689 | 0.074* | |
C22 | 0.8099 (2) | 0.3026 (2) | 0.19730 (17) | 0.0423 (5) | |
H22 | 0.8466 | 0.2560 | 0.2482 | 0.051* | |
C23 | 0.8304 (3) | 0.2713 (2) | 0.10338 (19) | 0.0509 (6) | |
H23A | 0.7758 | 0.3157 | 0.0532 | 0.061* | |
H23B | 0.8098 | 0.1930 | 0.0900 | 0.061* | |
C24 | 0.9686 (3) | 0.2921 (3) | 0.10614 (19) | 0.0571 (7) | |
H24A | 1.0216 | 0.2369 | 0.1468 | 0.068* | |
H24B | 0.9782 | 0.2839 | 0.0429 | 0.068* | |
C25 | 1.0089 (2) | 0.4075 (3) | 0.14274 (16) | 0.0492 (6) | |
C26 | 1.0604 (2) | 0.4175 (2) | 0.24703 (16) | 0.0421 (5) | |
H26 | 1.0649 | 0.3465 | 0.2813 | 0.051* | |
C27 | 1.0517 (2) | 0.5191 (2) | 0.30495 (15) | 0.0381 (5) | |
H27 | 1.0172 | 0.5826 | 0.2635 | 0.046* | |
C28 | 0.9797 (2) | 0.50289 (19) | 0.37965 (14) | 0.0344 (4) | |
H28 | 0.9956 | 0.4266 | 0.4048 | 0.041* | |
C29 | 0.8374 (2) | 0.5233 (2) | 0.35161 (17) | 0.0402 (5) | |
H29A | 0.8175 | 0.5796 | 0.3021 | 0.048* | |
H29B | 0.8160 | 0.5543 | 0.4061 | 0.048* | |
C33 | 1.0515 (2) | 0.58488 (19) | 0.45719 (15) | 0.0365 (5) | |
H33 | 1.0199 | 0.6602 | 0.4371 | 0.044* | |
C32 | 1.1838 (2) | 0.5786 (2) | 0.44833 (16) | 0.0396 (5) | |
C35 | 0.9483 (3) | 0.5033 (3) | 0.08128 (19) | 0.0646 (9) | |
H35B | 0.8588 | 0.4943 | 0.0637 | 0.097* | |
H35C | 0.9765 | 0.5050 | 0.0252 | 0.097* | |
H35A | 0.9706 | 0.5723 | 0.1155 | 0.097* | |
C34 | 0.6593 (3) | 0.4624 (3) | 0.1425 (2) | 0.0610 (8) | |
H34C | 0.5779 | 0.4635 | 0.1531 | 0.092* | |
H34B | 0.6525 | 0.4336 | 0.0803 | 0.092* | |
H34A | 0.6926 | 0.5371 | 0.1477 | 0.092* | |
C36 | 1.0443 (2) | 0.5693 (2) | 0.55869 (16) | 0.0415 (5) | |
H36A | 1.1009 | 0.6218 | 0.5999 | 0.050* | |
H36B | 0.9598 | 0.5858 | 0.5612 | 0.050* | |
C37 | 1.0992 (2) | 0.4316 (2) | 0.68938 (16) | 0.0404 (5) | |
C38 | 1.0581 (3) | 0.5010 (3) | 0.75004 (17) | 0.0485 (6) | |
H38 | 1.0179 | 0.5680 | 0.7278 | 0.058* | |
C39 | 1.0775 (3) | 0.4699 (3) | 0.8449 (2) | 0.0605 (8) | |
H39 | 1.0499 | 0.5168 | 0.8855 | 0.073* | |
C40 | 1.1361 (3) | 0.3719 (3) | 0.8788 (2) | 0.0667 (9) | |
H40 | 1.1477 | 0.3516 | 0.9417 | 0.080* | |
C41 | 1.1782 (3) | 0.3030 (3) | 0.8184 (2) | 0.0638 (8) | |
H41 | 1.2191 | 0.2365 | 0.8413 | 0.077* | |
C42 | 1.1600 (3) | 0.3320 (3) | 0.7240 (2) | 0.0520 (6) | |
H42 | 1.1884 | 0.2849 | 0.6840 | 0.062* | |
N1 | 0.4918 (2) | 0.2371 (2) | 0.34005 (15) | 0.0489 (5) | |
H1A | 0.5266 | 0.1966 | 0.3887 | 0.059* | |
N2 | 1.0773 (3) | 0.45606 (19) | 0.59289 (14) | 0.0527 (6) | |
H2 | 1.0834 | 0.4041 | 0.5539 | 0.063* | |
O1 | 0.7980 (2) | 0.3611 (2) | 0.56602 (15) | 0.0659 (7) | |
H01 | 0.8724 | 0.3776 | 0.5775 | 0.099* | |
O2 | 0.4732 (3) | 0.1356 (2) | 0.73250 (17) | 0.0710 (7) | |
O3 | 0.34515 (19) | 0.2358 (2) | 0.55866 (15) | 0.0637 (6) | |
O4 | 0.2194 (2) | 0.2324 (3) | 0.41145 (19) | 0.0765 (8) | |
O5 | 0.7933 (2) | 0.32770 (17) | 0.37792 (12) | 0.0524 (5) | |
H05 | 0.7965 | 0.3458 | 0.4324 | 0.079* | |
O6 | 1.28143 (17) | 0.59853 (19) | 0.50680 (14) | 0.0552 (5) | |
O7 | 1.18128 (16) | 0.54301 (16) | 0.36102 (11) | 0.0430 (4) | |
O8 | 1.14237 (18) | 0.4236 (2) | 0.18592 (14) | 0.0618 (6) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0482 (13) | 0.0575 (15) | 0.0426 (12) | 0.0078 (12) | 0.0162 (10) | −0.0083 (11) |
C2 | 0.0603 (17) | 0.073 (2) | 0.0473 (14) | 0.0220 (16) | 0.0093 (12) | 0.0034 (14) |
C3 | 0.082 (2) | 0.0701 (19) | 0.0481 (14) | 0.0188 (18) | 0.0226 (14) | 0.0164 (14) |
C4 | 0.0630 (16) | 0.0602 (16) | 0.0436 (13) | −0.0008 (14) | 0.0229 (12) | 0.0092 (12) |
C5 | 0.0555 (15) | 0.0461 (13) | 0.0459 (12) | −0.0014 (12) | 0.0222 (11) | 0.0029 (11) |
C6 | 0.0454 (13) | 0.0529 (14) | 0.0432 (12) | −0.0018 (12) | 0.0163 (10) | 0.0016 (11) |
C7 | 0.0346 (11) | 0.0442 (12) | 0.0369 (10) | −0.0007 (10) | 0.0081 (8) | 0.0010 (9) |
C8 | 0.0507 (14) | 0.0475 (14) | 0.0472 (12) | −0.0077 (12) | 0.0035 (11) | 0.0057 (11) |
C9 | 0.0454 (14) | 0.0571 (15) | 0.0467 (13) | −0.0132 (12) | 0.0101 (11) | −0.0005 (12) |
C10 | 0.0354 (11) | 0.0552 (14) | 0.0414 (12) | −0.0021 (11) | 0.0107 (9) | −0.0111 (11) |
C11 | 0.0328 (11) | 0.0484 (13) | 0.0443 (12) | 0.0039 (10) | 0.0088 (9) | 0.0043 (10) |
C12 | 0.0338 (12) | 0.0651 (17) | 0.0575 (15) | −0.0002 (12) | 0.0135 (11) | 0.0071 (13) |
C13 | 0.0384 (11) | 0.0562 (15) | 0.0404 (12) | 0.0022 (11) | 0.0079 (9) | 0.0050 (11) |
C14 | 0.0629 (17) | 0.0616 (17) | 0.0625 (16) | 0.0081 (15) | 0.0211 (14) | −0.0163 (14) |
C30 | 0.0348 (11) | 0.0490 (13) | 0.0375 (11) | −0.0047 (10) | 0.0144 (8) | 0.0006 (10) |
C15 | 0.072 (2) | 0.096 (3) | 0.0502 (14) | 0.0136 (19) | 0.0310 (14) | 0.0030 (17) |
C16 | 0.0385 (12) | 0.0522 (14) | 0.0425 (12) | −0.0119 (11) | 0.0110 (9) | 0.0012 (10) |
C17 | 0.0448 (13) | 0.0544 (15) | 0.0503 (13) | −0.0073 (12) | 0.0120 (11) | −0.0018 (12) |
C18 | 0.0538 (15) | 0.0599 (17) | 0.0671 (17) | −0.0124 (14) | 0.0251 (13) | −0.0137 (14) |
C31 | 0.0365 (11) | 0.0467 (12) | 0.0340 (10) | −0.0103 (10) | 0.0095 (8) | −0.0004 (9) |
C19 | 0.081 (2) | 0.091 (3) | 0.0499 (15) | −0.012 (2) | 0.0235 (15) | −0.0146 (17) |
C20 | 0.090 (2) | 0.107 (3) | 0.0412 (15) | 0.006 (2) | 0.0083 (15) | 0.0066 (18) |
C21 | 0.0651 (18) | 0.0718 (19) | 0.0450 (14) | 0.0087 (16) | 0.0100 (12) | 0.0063 (13) |
C22 | 0.0474 (13) | 0.0432 (12) | 0.0373 (11) | −0.0073 (11) | 0.0132 (9) | 0.0005 (9) |
C23 | 0.0587 (15) | 0.0519 (14) | 0.0432 (12) | −0.0102 (13) | 0.0160 (11) | −0.0105 (11) |
C24 | 0.0625 (16) | 0.0734 (19) | 0.0391 (12) | −0.0036 (15) | 0.0204 (11) | −0.0149 (13) |
C25 | 0.0463 (13) | 0.0719 (18) | 0.0335 (11) | −0.0125 (13) | 0.0179 (10) | −0.0062 (11) |
C26 | 0.0382 (11) | 0.0553 (14) | 0.0336 (10) | −0.0017 (11) | 0.0113 (9) | −0.0008 (10) |
C27 | 0.0339 (11) | 0.0470 (12) | 0.0319 (10) | −0.0038 (10) | 0.0065 (8) | 0.0030 (9) |
C28 | 0.0363 (10) | 0.0343 (10) | 0.0320 (9) | −0.0009 (9) | 0.0088 (8) | 0.0007 (8) |
C29 | 0.0382 (11) | 0.0421 (12) | 0.0406 (11) | 0.0012 (10) | 0.0115 (9) | −0.0032 (9) |
C33 | 0.0394 (11) | 0.0337 (10) | 0.0360 (10) | −0.0019 (9) | 0.0097 (8) | −0.0016 (9) |
C32 | 0.0402 (12) | 0.0379 (11) | 0.0400 (11) | −0.0043 (10) | 0.0100 (9) | −0.0019 (9) |
C35 | 0.077 (2) | 0.081 (2) | 0.0340 (12) | −0.0202 (18) | 0.0122 (12) | 0.0104 (13) |
C34 | 0.0603 (17) | 0.0706 (19) | 0.0451 (13) | 0.0094 (16) | 0.0032 (12) | 0.0035 (13) |
C36 | 0.0486 (12) | 0.0393 (12) | 0.0369 (11) | −0.0018 (10) | 0.0122 (9) | −0.0047 (9) |
C37 | 0.0401 (12) | 0.0414 (12) | 0.0382 (11) | −0.0087 (10) | 0.0085 (9) | 0.0007 (9) |
C38 | 0.0510 (14) | 0.0539 (15) | 0.0423 (12) | −0.0043 (12) | 0.0160 (10) | −0.0003 (11) |
C39 | 0.0647 (18) | 0.078 (2) | 0.0449 (13) | −0.0093 (16) | 0.0255 (13) | −0.0008 (14) |
C40 | 0.0673 (19) | 0.088 (2) | 0.0457 (14) | −0.0106 (18) | 0.0168 (13) | 0.0184 (15) |
C41 | 0.0653 (18) | 0.0669 (18) | 0.0585 (16) | 0.0050 (16) | 0.0165 (14) | 0.0261 (15) |
C42 | 0.0574 (16) | 0.0480 (14) | 0.0508 (14) | 0.0011 (12) | 0.0155 (11) | 0.0030 (12) |
N1 | 0.0478 (11) | 0.0582 (13) | 0.0358 (9) | 0.0090 (10) | 0.0038 (8) | 0.0039 (9) |
N2 | 0.0830 (17) | 0.0409 (11) | 0.0326 (9) | 0.0061 (11) | 0.0136 (10) | −0.0028 (9) |
O1 | 0.0464 (10) | 0.1072 (19) | 0.0495 (10) | −0.0175 (12) | 0.0223 (9) | −0.0218 (12) |
O2 | 0.0815 (16) | 0.0694 (14) | 0.0646 (13) | −0.0191 (12) | 0.0244 (11) | 0.0158 (11) |
O3 | 0.0457 (10) | 0.0896 (17) | 0.0575 (11) | −0.0153 (11) | 0.0173 (9) | 0.0120 (11) |
O4 | 0.0414 (11) | 0.0991 (19) | 0.0785 (15) | −0.0171 (12) | −0.0001 (10) | 0.0144 (14) |
O5 | 0.0671 (12) | 0.0554 (11) | 0.0368 (8) | −0.0122 (9) | 0.0182 (8) | 0.0066 (8) |
O6 | 0.0402 (9) | 0.0663 (12) | 0.0538 (10) | −0.0085 (9) | 0.0047 (8) | −0.0156 (9) |
O7 | 0.0371 (8) | 0.0533 (10) | 0.0392 (8) | −0.0073 (8) | 0.0120 (6) | −0.0037 (7) |
O8 | 0.0455 (10) | 0.0931 (17) | 0.0533 (10) | −0.0095 (11) | 0.0244 (8) | −0.0165 (11) |
C1—C10 | 1.320 (4) | C19—H19 | 0.9300 |
C1—C2 | 1.500 (4) | C20—C21 | 1.403 (5) |
C1—H1 | 0.9300 | C20—H20 | 0.9300 |
C2—C3 | 1.539 (5) | C21—H21 | 0.9300 |
C2—H2A | 0.9700 | C22—C23 | 1.507 (3) |
C2—H2B | 0.9700 | C22—H22 | 0.9300 |
C3—C4 | 1.501 (5) | C23—C24 | 1.544 (4) |
C3—H3A | 0.9700 | C23—H23A | 0.9700 |
C3—H3B | 0.9700 | C23—H23B | 0.9700 |
C4—O2 | 1.454 (4) | C24—C25 | 1.501 (4) |
C4—C5 | 1.475 (4) | C24—H24A | 0.9700 |
C4—C15 | 1.492 (5) | C24—H24B | 0.9700 |
C5—O2 | 1.446 (3) | C25—O8 | 1.452 (3) |
C5—C6 | 1.504 (4) | C25—C26 | 1.482 (3) |
C5—H5 | 0.9800 | C25—C35 | 1.495 (5) |
C6—O3 | 1.461 (3) | C26—O8 | 1.449 (3) |
C6—C7 | 1.550 (3) | C26—C27 | 1.500 (4) |
C6—H6 | 0.9800 | C26—H26 | 0.9800 |
C7—C11 | 1.539 (3) | C27—O7 | 1.471 (3) |
C7—C8 | 1.539 (4) | C27—C28 | 1.541 (3) |
C7—H7 | 0.9800 | C27—H27 | 0.9800 |
C8—C9 | 1.532 (4) | C28—C29 | 1.537 (3) |
C8—H8A | 0.9700 | C28—C33 | 1.543 (3) |
C8—H8B | 0.9700 | C28—H28 | 0.9800 |
C9—O1 | 1.427 (4) | C29—H29A | 0.9700 |
C9—C10 | 1.507 (4) | C29—H29B | 0.9700 |
C9—H9 | 0.9800 | C33—C32 | 1.513 (3) |
C10—C14 | 1.504 (4) | C33—C36 | 1.527 (3) |
C11—C12 | 1.503 (4) | C33—H33 | 0.9800 |
C11—C13 | 1.518 (3) | C32—O6 | 1.203 (3) |
C11—H11 | 0.9800 | C32—O7 | 1.344 (3) |
C12—O4 | 1.203 (4) | C35—H35B | 0.9600 |
C12—O3 | 1.351 (4) | C35—H35C | 0.9600 |
C13—N1 | 1.444 (4) | C35—H35A | 0.9600 |
C13—H13A | 0.9700 | C34—H34C | 0.9600 |
C13—H13B | 0.9700 | C34—H34B | 0.9600 |
C14—H14A | 0.9600 | C34—H34A | 0.9600 |
C14—H14B | 0.9600 | C36—N2 | 1.453 (3) |
C14—H14C | 0.9600 | C36—H36A | 0.9700 |
C30—O5 | 1.420 (3) | C36—H36B | 0.9700 |
C30—C31 | 1.512 (3) | C37—C38 | 1.385 (4) |
C30—C29 | 1.548 (3) | C37—C42 | 1.391 (4) |
C30—H30 | 0.9800 | C37—N2 | 1.400 (3) |
C15—H15A | 0.9600 | C38—C39 | 1.400 (4) |
C15—H15B | 0.9600 | C38—H38 | 0.9300 |
C15—H15C | 0.9600 | C39—C40 | 1.363 (5) |
C16—C21 | 1.384 (4) | C39—H39 | 0.9300 |
C16—C17 | 1.395 (4) | C40—C41 | 1.384 (5) |
C16—N1 | 1.396 (3) | C40—H40 | 0.9300 |
C17—C18 | 1.380 (4) | C41—C42 | 1.388 (4) |
C17—H17 | 0.9300 | C41—H41 | 0.9300 |
C18—C19 | 1.377 (5) | C42—H42 | 0.9300 |
C18—H18 | 0.9300 | N1—H1A | 0.8600 |
C31—C22 | 1.321 (4) | N2—H2 | 0.8600 |
C31—C34 | 1.505 (4) | O1—H01 | 0.8200 |
C19—C20 | 1.361 (6) | O5—H05 | 0.8200 |
C10—C1—C2 | 127.9 (3) | C16—C21—C20 | 119.3 (3) |
C10—C1—H1 | 116.0 | C16—C21—H21 | 120.3 |
C2—C1—H1 | 116.0 | C20—C21—H21 | 120.3 |
C1—C2—C3 | 110.8 (3) | C31—C22—C23 | 127.4 (2) |
C1—C2—H2A | 109.5 | C31—C22—H22 | 116.3 |
C3—C2—H2A | 109.5 | C23—C22—H22 | 116.3 |
C1—C2—H2B | 109.5 | C22—C23—C24 | 109.9 (2) |
C3—C2—H2B | 109.5 | C22—C23—H23A | 109.7 |
H2A—C2—H2B | 108.1 | C24—C23—H23A | 109.7 |
C4—C3—C2 | 110.1 (3) | C22—C23—H23B | 109.7 |
C4—C3—H3A | 109.6 | C24—C23—H23B | 109.7 |
C2—C3—H3A | 109.6 | H23A—C23—H23B | 108.2 |
C4—C3—H3B | 109.6 | C25—C24—C23 | 110.6 (3) |
C2—C3—H3B | 109.6 | C25—C24—H24A | 109.5 |
H3A—C3—H3B | 108.2 | C23—C24—H24A | 109.5 |
O2—C4—C5 | 59.19 (18) | C25—C24—H24B | 109.5 |
O2—C4—C15 | 112.6 (3) | C23—C24—H24B | 109.5 |
C5—C4—C15 | 122.4 (3) | H24A—C24—H24B | 108.1 |
O2—C4—C3 | 117.6 (3) | O8—C25—C26 | 59.19 (15) |
C5—C4—C3 | 115.8 (3) | O8—C25—C35 | 113.2 (3) |
C15—C4—C3 | 116.5 (3) | C26—C25—C35 | 122.7 (3) |
O2—C5—C4 | 59.69 (19) | O8—C25—C24 | 116.3 (3) |
O2—C5—C6 | 118.5 (2) | C26—C25—C24 | 115.7 (2) |
C4—C5—C6 | 124.4 (3) | C35—C25—C24 | 116.6 (2) |
O2—C5—H5 | 114.4 | O8—C26—C25 | 59.37 (15) |
C4—C5—H5 | 114.4 | O8—C26—C27 | 117.5 (2) |
C6—C5—H5 | 114.4 | C25—C26—C27 | 125.7 (2) |
O3—C6—C5 | 106.6 (2) | O8—C26—H26 | 114.2 |
O3—C6—C7 | 105.40 (19) | C25—C26—H26 | 114.2 |
C5—C6—C7 | 113.9 (2) | C27—C26—H26 | 114.2 |
O3—C6—H6 | 110.3 | O7—C27—C26 | 105.43 (19) |
C5—C6—H6 | 110.3 | O7—C27—C28 | 104.31 (16) |
C7—C6—H6 | 110.3 | C26—C27—C28 | 115.5 (2) |
C11—C7—C8 | 110.6 (2) | O7—C27—H27 | 110.4 |
C11—C7—C6 | 101.32 (19) | C26—C27—H27 | 110.4 |
C8—C7—C6 | 118.1 (2) | C28—C27—H27 | 110.4 |
C11—C7—H7 | 108.8 | C29—C28—C27 | 119.32 (18) |
C8—C7—H7 | 108.8 | C29—C28—C33 | 112.10 (19) |
C6—C7—H7 | 108.8 | C27—C28—C33 | 100.51 (17) |
C9—C8—C7 | 117.8 (2) | C29—C28—H28 | 108.1 |
C9—C8—H8A | 107.9 | C27—C28—H28 | 108.1 |
C7—C8—H8A | 107.9 | C33—C28—H28 | 108.1 |
C9—C8—H8B | 107.9 | C28—C29—C30 | 116.7 (2) |
C7—C8—H8B | 107.9 | C28—C29—H29A | 108.1 |
H8A—C8—H8B | 107.2 | C30—C29—H29A | 108.1 |
O1—C9—C10 | 112.6 (2) | C28—C29—H29B | 108.1 |
O1—C9—C8 | 107.9 (2) | C30—C29—H29B | 108.1 |
C10—C9—C8 | 113.7 (2) | H29A—C29—H29B | 107.3 |
O1—C9—H9 | 107.4 | C32—C33—C36 | 113.35 (19) |
C10—C9—H9 | 107.4 | C32—C33—C28 | 102.57 (18) |
C8—C9—H9 | 107.4 | C36—C33—C28 | 119.1 (2) |
C1—C10—C14 | 125.5 (3) | C32—C33—H33 | 107.1 |
C1—C10—C9 | 121.2 (2) | C36—C33—H33 | 107.1 |
C14—C10—C9 | 113.3 (3) | C28—C33—H33 | 107.1 |
C12—C11—C13 | 113.1 (2) | O6—C32—O7 | 121.1 (2) |
C12—C11—C7 | 104.6 (2) | O6—C32—C33 | 129.1 (2) |
C13—C11—C7 | 119.2 (2) | O7—C32—C33 | 109.72 (18) |
C12—C11—H11 | 106.4 | C25—C35—H35B | 109.5 |
C13—C11—H11 | 106.4 | C25—C35—H35C | 109.5 |
C7—C11—H11 | 106.4 | H35B—C35—H35C | 109.5 |
O4—C12—O3 | 120.7 (3) | C25—C35—H35A | 109.5 |
O4—C12—C11 | 129.4 (3) | H35B—C35—H35A | 109.5 |
O3—C12—C11 | 109.9 (2) | H35C—C35—H35A | 109.5 |
N1—C13—C11 | 112.2 (2) | C31—C34—H34C | 109.5 |
N1—C13—H13A | 109.2 | C31—C34—H34B | 109.5 |
C11—C13—H13A | 109.2 | H34C—C34—H34B | 109.5 |
N1—C13—H13B | 109.2 | C31—C34—H34A | 109.5 |
C11—C13—H13B | 109.2 | H34C—C34—H34A | 109.5 |
H13A—C13—H13B | 107.9 | H34B—C34—H34A | 109.5 |
C10—C14—H14A | 109.5 | N2—C36—C33 | 111.98 (19) |
C10—C14—H14B | 109.5 | N2—C36—H36A | 109.2 |
H14A—C14—H14B | 109.5 | C33—C36—H36A | 109.2 |
C10—C14—H14C | 109.5 | N2—C36—H36B | 109.2 |
H14A—C14—H14C | 109.5 | C33—C36—H36B | 109.2 |
H14B—C14—H14C | 109.5 | H36A—C36—H36B | 107.9 |
O5—C30—C31 | 110.4 (2) | C38—C37—C42 | 119.3 (2) |
O5—C30—C29 | 110.49 (18) | C38—C37—N2 | 122.1 (2) |
C31—C30—C29 | 112.54 (19) | C42—C37—N2 | 118.5 (2) |
O5—C30—H30 | 107.8 | C37—C38—C39 | 119.8 (3) |
C31—C30—H30 | 107.8 | C37—C38—H38 | 120.1 |
C29—C30—H30 | 107.8 | C39—C38—H38 | 120.1 |
C4—C15—H15A | 109.5 | C40—C39—C38 | 121.0 (3) |
C4—C15—H15B | 109.5 | C40—C39—H39 | 119.5 |
H15A—C15—H15B | 109.5 | C38—C39—H39 | 119.5 |
C4—C15—H15C | 109.5 | C39—C40—C41 | 119.3 (3) |
H15A—C15—H15C | 109.5 | C39—C40—H40 | 120.4 |
H15B—C15—H15C | 109.5 | C41—C40—H40 | 120.4 |
C21—C16—C17 | 118.2 (3) | C40—C41—C42 | 120.8 (3) |
C21—C16—N1 | 123.0 (3) | C40—C41—H41 | 119.6 |
C17—C16—N1 | 118.8 (2) | C42—C41—H41 | 119.6 |
C18—C17—C16 | 121.1 (3) | C41—C42—C37 | 119.9 (3) |
C18—C17—H17 | 119.5 | C41—C42—H42 | 120.1 |
C16—C17—H17 | 119.5 | C37—C42—H42 | 120.1 |
C19—C18—C17 | 120.8 (3) | C16—N1—C13 | 120.8 (2) |
C19—C18—H18 | 119.6 | C16—N1—H1A | 119.6 |
C17—C18—H18 | 119.6 | C13—N1—H1A | 119.6 |
C22—C31—C34 | 125.7 (2) | C37—N2—C36 | 120.0 (2) |
C22—C31—C30 | 120.8 (2) | C37—N2—H2 | 120.0 |
C34—C31—C30 | 113.5 (2) | C36—N2—H2 | 120.0 |
C20—C19—C18 | 118.4 (3) | C9—O1—H01 | 109.5 |
C20—C19—H19 | 120.8 | C5—O2—C4 | 61.12 (17) |
C18—C19—H19 | 120.8 | C12—O3—C6 | 111.1 (2) |
C19—C20—C21 | 122.1 (3) | C30—O5—H05 | 109.5 |
C19—C20—H20 | 118.9 | C32—O7—C27 | 110.52 (18) |
C21—C20—H20 | 118.9 | C26—O8—C25 | 61.44 (15) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O6i | 0.86 | 2.54 | 3.311 (3) | 150 |
O1—H01···N2 | 0.82 | 2.41 | 3.221 (4) | 169 |
O5—H05···O1 | 0.82 | 1.97 | 2.778 (3) | 170 |
Symmetry code: (i) −x+2, y−1/2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C21H27NO4 |
Mr | 357.44 |
Crystal system, space group | Monoclinic, P21 |
Temperature (K) | 298 |
a, b, c (Å) | 11.1067 (8), 11.9406 (9), 14.6930 (11) |
β (°) | 106.315 (2) |
V (Å3) | 1870.1 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.27 × 0.18 × 0.12 |
Data collection | |
Diffractometer | Bruker X8 APEXII CCD area-detector diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 18091, 4005, 3651 |
Rint | 0.037 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.044, 0.131, 1.04 |
No. of reflections | 4005 |
No. of parameters | 474 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.28, −0.28 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O6i | 0.86 | 2.54 | 3.311 (3) | 150 |
O1—H01···N2 | 0.82 | 2.41 | 3.221 (4) | 169 |
O5—H05···O1 | 0.82 | 1.97 | 2.778 (3) | 170 |
Symmetry code: (i) −x+2, y−1/2, −z+1. |
Acknowledgements
The authors thank the Unit of Support for Technical and Scientific Research (UATRS, CNRST) for the X-ray measurements.
References
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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.
Our work lies within the framework of the evaluation of medicinal plants and in particular, Anvillea radiate. The main constituent of the chloroform extract of aerial parts of this plant is 9α-hydroxypartenolide (El Hassany et al., 2004). The reactivity of this sesquiterpene lactone and its derivatives has been the subject of several studies (Castaneda-Acosta et al.,1997; Neukirch et al., 2003; Der-Ren et al., 2006; Neelakantan et al., 2009), in order to prepare high value added products for use in industrial pharmacology. In this context, we have treated 9α-hydroxyparthenolide with an equivalent amount of aniline in the presence of a catalytic amount of Lewis acid (ZnCl2) and isolated 9α -hydroxy-4,8-dimethyl-12-phenylaminomethyl-3,14-dioxa-tricyclo [9.3.0.02,4] tetradec-7-in-13-one in a yield of 50%. The structure of this new product was confirmed by its single crystal X-ray structure.
The asymmetric unit contains two crystallographically independent molecules (Fig. 1). Each molecule is built up from two fused five- and ten-membered rings with the phenylaminomethyl group at positions 11 and 33 in the β configuration. The ten-membered ring displays an approximate chair-chair conformation. Whereas the five-membered rings shows an envelope conformation as indicated by Cremer & Pople (1975) puckering parameters Q = 0.275 (3) Å and ϕ = 72.1 (6) ° for the ring (C6,C7···O3), and Q = 0.350 (2) Å; ϕ = 74.7 (4)° for the other five membered ring (C27, C28···O7). The atoms C7 and C28 deviate from the respective mean plane through other four atoms in the ring by 0.443 (2) and 0.553 (2) Å respectively. In the first molecule (C1 to C21), the dihedral angle between the rings is 22.54 (17) °. The corresponding value in the second molecule (C22 to C42) is 23.39 (14) °. This is the typical conformation found for other sesquiterpenes lactones (Watson & Zabel, 1982). Intermolecular O—H···O(N) and N—H···O hydrogen bonds ensures the cohesion of the crystal structure, Table 1.