Startseite Crystal structure of 2-bromo-1-hydroxy-3-(3-methylbut-2-enyloxy)-9H-xanthen-9-one, C18H15BrO4
Artikel Open Access

Crystal structure of 2-bromo-1-hydroxy-3-(3-methylbut-2-enyloxy)-9H-xanthen-9-one, C18H15BrO4

  • Vuyisa Mzozoyana ORCID logo , Sizwe J. Zamisa ORCID logo EMAIL logo und Fanie R. van Heerden ORCID logo
Veröffentlicht/Copyright: 24. Januar 2024

Abstract

C18H15BrO4, monoclinic, P21/c (no. 14), a = 14.616(2) Å, b = 14.657(2) Å, c = 7.3864(12) Å, β = 103.627(7)°, V = 1537.8(4) Å3, Z = 4, Rgt(F) = 0.0315, wRref(F2) = 0.0935, T = 100 K.

CCDC no.: 2321829

Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal: Yellow block
Size: 0.38 × 0.26 × 0.15 mm
Wavelength: MoKα radiation (0.71073 Å)
μ: 2.69 mm−1
Diffractometer, scan mode: Bruker APEX-II, φ and ω
θmax, completeness: 28.3°, >99 %
N(hkl)measured, N(hkl)unique, Rint: 10,276, 3735, 0.024
Criterion for Iobs, N(hkl)gt: Iobs > 2 σ(Iobs), 3389
N(param)refined: 235
Programs: Olex2 [1, 3], Shelx [2]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

Atom x y z Uiso*/Ueq
Br1 0.76415 (5) 0.47797 (5) 1.12804 (10) 0.0358 (4)
O1 0.75349 (9) 0.27669 (9) 1.0748 (2) 0.0151 (3)
O2 0.45994 (9) 0.25607 (9) 0.63692 (19) 0.0144 (3)
O3 0.42484 (11) 0.53394 (9) 0.6432 (2) 0.0204 (3)
O4 0.58242 (10) 0.54493 (9) 0.8895 (2) 0.0191 (3)
H4a 0.53165 (10) 0.56302 (9) 0.8199 (2) 0.0286 (5)*
C1 1.01321 (17) 0.1070 (2) 1.3463 (4) 0.0423 (7)
H1a 0.9888 (4) 0.1056 (14) 1.4589 (7) 0.0634 (10)*
H1b 1.0360 (10) 0.0462 (6) 1.3235 (13) 0.0634 (10)*
H1c 1.0652 (7) 0.1508 (8) 1.3630 (19) 0.0634 (10)*
C2 0.93617 (16) 0.13512 (16) 1.1831 (4) 0.0278 (5)
C3 0.9655 (2) 0.1425 (3) 1.0019 (4) 0.0489 (8)
H3a 0.9101 (3) 0.1551 (16) 0.9009 (6) 0.0734 (12)*
H3b 1.0110 (12) 0.1923 (10) 1.0097 (12) 0.0734 (12)*
H3c 0.9945 (15) 0.0851 (6) 0.9767 (16) 0.0734 (12)*
C4 0.84992 (14) 0.15249 (14) 1.2069 (3) 0.0214 (4)
H4 0.84153 (14) 0.14699 (14) 1.3301 (3) 0.0257 (5)*
C5 0.76611 (13) 0.17940 (13) 1.0610 (3) 0.0180 (4)
H5a 0.77540 (13) 0.16364 (13) 0.9362 (3) 0.0217 (5)*
H5b 0.70972 (13) 0.14672 (13) 1.0794 (3) 0.0217 (5)*
C6 0.67501 (12) 0.31371 (12) 0.9677 (3) 0.0133 (4)
C7 0.66746 (13) 0.40932 (13) 0.9779 (3) 0.0149 (4)
C8 0.58895 (13) 0.45446 (12) 0.8748 (3) 0.0140 (4)
C9 0.51667 (12) 0.40407 (12) 0.7553 (3) 0.0131 (4)
C10 0.43458 (13) 0.44939 (13) 0.6432 (3) 0.0151 (4)
C11 0.36448 (13) 0.38918 (13) 0.5296 (3) 0.0148 (4)
C12 0.27980 (14) 0.42323 (15) 0.4182 (3) 0.0207 (4)
H12 0.26719 (14) 0.48684 (15) 0.4168 (3) 0.0249 (5)*
C13 0.21496 (15) 0.36492 (15) 0.3112 (3) 0.0237 (4)
H13 0.15784 (15) 0.38822 (15) 0.2362 (3) 0.0285 (5)*
C14 0.23365 (14) 0.27130 (15) 0.3135 (3) 0.0202 (4)
H14 0.18930 (14) 0.23148 (15) 0.2379 (3) 0.0243 (5)*
C15 0.31558 (13) 0.23572 (14) 0.4240 (3) 0.0171 (4)
H15 0.32722 (13) 0.17191 (14) 0.4270 (3) 0.0205 (5)*
C16 0.38059 (12) 0.29536 (13) 0.5306 (3) 0.0138 (4)
C17 0.52643 (12) 0.30936 (12) 0.7474 (3) 0.0123 (3)
C18 0.60462 (12) 0.26315 (12) 0.8509 (3) 0.0135 (4)
H18 0.60976 (12) 0.19878 (12) 0.8419 (3) 0.0162 (4)*

1 Source of material

The title compound was obtained as a minor side product in a prenylation reaction. (2-Fluorophenyl) (2,4,6-trihydroxyphenyl)methanone (2.0 g), prenylbromide (1.3 g) and K2CO3 (1.3 g) in dry acetone (15 mL) was refluxed for 1 h. The mixture was allowed to cool before being filtered through a sintered funnel. The filtrate was washed with a minimal amount of water and extracted with ethyl acetate. A combined organic layer was dried over anhydrous MgSO4. After the solvent of the mixture was reduced in vacuo, the mixture was purified by column chromatography and recrystallized by methanol/dichloromethane. Two different types of crystals were observed. Crystals of the title compound had a block morphology with a light yellow tint whilst the major product from the prenylation reaction appeared as colourless plate crystals. For the reaction, commercial prenyl bromide of 95 % purity was used. This product resulted from the reaction of the xanthone with minor amounts of bromine that must have been present in the prenylbromide.

2 Experimental details

Using Olex2 [1], the structure was solved with the Shelxs [2] structure solution program using Direct Methods and refined with the olex2.refine [3] refinement package.

3 Comment

Prenylated xanthones are secondary metabolites and have been reported to exhibit several important biological activities, such as antitumour [4], [5], [6], anti-inflammatory [7, 8] and anti-thrombotic [9]. Due to the chemotherapeutic potency of these compounds, different strategies have been developed to synthesize them. The most commonly used synthetic methods include the addition of the prenyl group in the last step [7, 10].

The crystal structure of the title compound has one molecule in the asymmetric unit which consists of a xanthonyl with an oxyprenyl moiety [11]. The three fused rings which constitute the xanthonyl unit are almost coplanar with dihedral angles between the fused rings ranging from 0.3(2)° to 0.9(2)°. Furthermore, the xanthonyl unit appears to be almost orthogonal with respect to the oxyprenyl moiety with an observed dihedral angle of 84.8(2)°. Intramolecular O(4)–H(4)⋯O(3) hydrogen bonding was observed with O⋯O distance of 2.581(3) Å and an O–H⋯O angle of 147°. Non-classical intermolecular C(15)–H(15)⋯O(4) and C(18)–H(18)⋯O(3) hydrogen bonding were also observed with C⋯O distances of 3.303(4) Å and 3.380(4) Å, respectively. The C–H⋯O hydrogen bonds link neighbouring molecules to form a one-dimensional structure which extends along the b axis.


Corresponding author: Sizwe J. Zamisa, School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Westville Campus, Westville, 4000, Durban, South Africa, E-mail:

Funding source: UKZN; National Research Foundation of South Africa

Award Identifier / Grant number: 98345 (FRVH)

Acknowledgements

We wish to extend our sincere thanks to UKZN for financial support.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: UKZN; National Research Foundation of South Africa, grant number 98345 (FRVH).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

References

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Received: 2023-11-08
Accepted: 2023-12-28
Published Online: 2024-01-24
Published in Print: 2024-04-25

© 2023 the author(s), published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 International License.

Artikel in diesem Heft

  1. Frontmatter
  2. New Crystal Structures
  3. Solvothermal synthesis and crystal structure of aqua-tris(p-acetamidobenzoate-κ2O,O′)-(2,2′-bipyridine-κ2N,N′)terbium(III) - water - methanol (1/1/1)
  4. Crystal structure of hexaaquazinc(II) catena-poly[bis(1-(3-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylato-κ2O,O′)-bis(μ2-1-(3-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylato-κ2O:O′)trizinc(II)] hexahydrate C26H36N4O20Zn2
  5. The crystal structure of valinyl-N-ium-4-(5-(thiophen-2-yl)isoxazol-3-yl)phenyl trifluoroacetate
  6. Crystal structure of bis(3,5-diisopropyl-1H-pyrazol-4-ammonium) tetrafluoroterephthalate, 2[C9H18N3][C8F4O4]
  7. Crystal structure of aqua-octakis(μ3-salicylato)-(1,10-phenanthroline)-(acetonitrile)-dicobalt(II)-trititanium(IV), C70H45N3O25Co2Ti3
  8. Crystal structure of catena-poly[aqua-(μ2-4,4′-diimidazole diphenyl ether-κ2N:N′)-(sulfato-κ1O)-cobalt(II)] – dimethylformamide (2/1), C39H37CoN9O8S
  9. Crystal structure of (5R,8R,9R,10R,12R, 13R,14R,17S)-2-(E-3-fluorobenzylidene)-12-hydroxy-4,4,8,10,14-pentamethyl-17-((R)-2,6,6-trimethyltetrahydro-2H-pyran-2-yl) hexadecahydro-3H-cyclopenta[a]phenanthren-3-one, C37H53FO3
  10. Crystal structure of (Z)-4-((4,5,6-trimethoxy-3-oxobenzofuran-2(3H)-ylidene)methyl)phenyl diphenylphosphinate, C30H25O7P
  11. Crystal structure of 3-((5-methylpyridin-2-yl)amino)-1-phenylpropan-1-one, C15H16N2O
  12. The crystal structure of (R)-9-(5-methoxy-2-methyl-2,3-dihydro-1H-cyclopenta[a]naphthalen-1-ylidene)-9H-thioxanthene, C28H22OS
  13. Crystal structure of diaqua-bis[1-(1-(hydroxymethyl)-1H-pyrazol-3-yl)-5-methyl-1H-1,2,3-triazole-4-carboxylato-κ2N,O)] manganese(II), C16H20MnN10O8
  14. The crystal structure of t-butyl 7-[4-(4-fluorophenyl)-2-[(methanesulfonyl)(methyl)amino]-6-(propan-2-yl)pyrimidin-5-yl]-3,5-dihydroxyhept-6-enoate, C26H36FN3O6S
  15. The crystal structure of samarium sulfate pentahydrate, Sm2(SO4)3(H2O)5
  16. The crystal structure of [triaqua-(8-carboxymethoxy-quinoline-2-carboxylate-κ 4 N,O,O,O)-zinc(II)] monohydrate, C12H15NO9Zn
  17. The crystal structure of 2,3-difluoro-11H-benzo-[4,5]imidazo[2,1-a]isoindol-11-one, C14H6F2N2O
  18. The crystal structure of 2,3-di(9H-carbazol-9-yl)-9H-fluoren-9-one, C37H22N2O
  19. The crystal structure of 5-(2-chloro-3-(3,6-di-tert-butyl-9H-carbazol-9-yl)phenyl)-10,11-dihydro-5H-dibenzo[b,f]azepine, C40H39ClN2
  20. Crystal structure of 2-bromo-1-hydroxy-3-(3-methylbut-2-enyloxy)-9H-xanthen-9-one, C18H15BrO4
  21. Crystal structure of bis(μ2-benzenesulfonato-κ2O:O′)-bis(μ2-6,6′-((ethane-1,2-diylbis(azaneylylidene))bis(methaneylylidene))-bis(2-methoxyphenolato-κ6O,O′:O′,N,N′,O′′:O′′,O′′′))disodium(I)dicopper(II)
  22. The crystal structure of (E)-1,2-bis(benzo[e][1,2]azaborinin-2(1H)-yl)ethene, C18H16B2N2
  23. Crystal structure of 3-oxo-urs-12-en-28-benzyl ester, C37H52O3
  24. The crystal structure of ethyl (E)-1-chloro-3-(4-chloro-1-methyl-1H-indole-2-carbonyl)-4-oxo-2-phenylcyclooct-2-ene-1-carboxylate, C27H25Cl2NO4
  25. The crystal structure of 4,4′-((5-bromo-2-iodo-1,3-phenylene)bis(oxy))bis(tert-butylbenzene) ─ ethanol (2/1), C26H28BrIO2
  26. Crystal structure of (E)-1-(4-(benzyloxy)-2-hydroxyphenyl)-3-(dimethylamino)prop-2-en-1-one, C18H19NO3
  27. The crystal structure of N1,N3-bis(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)\ propanediamide hydrate, C25H26N6O4, 2(H2O)
  28. The crystal structure of 2,5-bis[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)amino]cyclohexa-2,5-diene-1,4-dione, C28H26N6O4
  29. Crystal structure of 3,4-bis[2-(hydroxymethyl)-pyrrolidin-1-yl] cyclobut-3-ene-1,2-dione hydrate, C14H22N2O5
  30. The crystal structure of 2-(3,4–dichlorobenzyl)-1H-benzimidazole, C14H10Cl2N2
  31. The crystal structure of 2-(2-((4,6-dimethoxypyrimidin-2-yl)oxy)phenyl)-4-(piperidin-1-yl)-5H-chromeno[2,3-d]pyrimidine, C28H27N5O4
  32. The crystal structure of 6-(benzofuran-2-yl)-2-oxo-4,5-diphenyl-3,4-dihydro-2H-pyran-3-carbonitrile, C26H17NO3
  33. Crystal structure of N-(4-bromobenzyl)-3-(difluoromethyl)-1-methyl-N-(pyridin-2-yl)-1H-pyrazole-4-carboxamide, C18H15BrF2N4O
  34. The crystal structure of the host-guest complex: N-{5-[2-(2,6-dimethylphenoxy)acetamido]-4-hydroxy-1,6-diphenylhexan-2-yl}-3-methyl-2-(2-oxo-1,3-diazinan-1-yl)butanamide-diethyl ether (2/1)
  35. The crystal structure of (Z)-4-amino-N-(1-(4-hydroxyphenyl)propylidene)benzohydrazide, C16H17N3O2
  36. The crystal structure of diethyl 1,4-dihydro-2,6-dimethyl-4-(3-cyanophenyl)-3,5-pyridinedicarboxylate, C20H22N2O4
  37. Crystal structure of 3-(5-((4-(difluoromethoxy)phenyl) sulfonyl)-3,4,5,6-tetrahydropyrrolo[3,4-c]pyrrol-2(1H)-yl) oxetane-3-carboxamide, C17H19F2N3O5S
  38. Crystal structure of 2-((2,6-dichloro-4-(3,5-dimethylisoxazol-4-yl)phenyl)amino)-N-(2-(4-methylpiperazin-1-yl)ethyl)benzamide hydrate, C25H37Cl2N5O6
  39. Crystal structure of 3-(benzo[d]thiazol-2-yl)-5-bromo-2-hydroxybenzaldehyde, C14H8BrNO2S
  40. Crystal structure of 3-(difluoromethyl)-1-methyl-N-(pyridin-2-yl)-1H-pyrazole-4-carboxamide, C11H10F2N4O
  41. Crystal structure of 3-(2-ethoxy-2-oxoethyl)-1-isopropyl-1H-imidazol-3-ium hexafluoridophosphate(V), C20H34F12N4P2
  42. Crystal structure of ethyl 5,6-dichloro-2-methyl-2,3-dihydro-1 H-benzo[d]imidazole-2-carboxylate, C11H12Cl2N2O2
  43. The crystal of structure of (OC-6-22)-pentakis(acetonitrile)bromidoruthenium(II)bromide monohydrate, C10H15Br2N5Ru
  44. Crystal structure of (2S,3R,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-2-(((4aS,5R,6S)-1-oxo-5-vinyl-4,4a,5,6-tetrahydro-1H,3H-pyrano[3,4-c]pyran-6-yl)oxy)tetrahydro-2H-pyran-3-yl 2,3-dihydroxybenzoate hydrate, C23H26O12·H2O
  45. The crystal structure of (E)-4-amino-N′-(1-(4-fluorophenyl)propylidene)benzohydrazide, C16H16FN3O
  46. The crystal structure of 2′-(9H-carbazol-9-yl)-[1,1′-binaphthalen]-2-amine, C32H22N2
  47. Crystal structure of poly[μ3-diiodido-[μ2-di(1H-pyrazol-1-yl)methane-κ2N,N′)]dicopper(I)], C7H8Cu2I2N4
  48. Crystal structure of 3-amino-N′-hydroxy-1H-pyrazole-4-carboximidamide, C4H7N5O
  49. The crystal structure of 1,3-diacetyltetrahydroimidazo[4,5-d]imidazole-2,5(1H,3H)-dione, C8H10O4N4
  50. Crystal structure of catena-poly[aqua-(μ2-1,4-diazabicyclo[2.2.2]octane-k2N: N′)-bis(sorbato-κ1O)-copper(II), C18H28CuN2O5
  51. Crystal structure of catena-poly[triaqua-(μ2 -1-(4-carboxylatophenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylato-κ3O,O′:O′′)manganese(II)], C12H12N2O8Mn
  52. The crystal structure of [hexaaquamagnesium(II)] 4-[(pyridine-4-carbonyl)-amino]-phthalate trihydrate, C14H26N2O14Mg
  53. Crystal structure of 1-(p-tolylphenyl)-4-(2-furoyl)-3-methyl-1H-pyrazol-5-ol, C16H14N2O3
  54. The crystal structure of bis(1,4,7,10,13-pentaoxacyclopentadecane)-potassium(I) dichloridocopper(I), C20H40Cl2CuKO10
  55. The crystal structure of tris(tetra-n-butylammonium) hexanitrato-κ2O,O′-lanthanium(III) C48H108N9O18La
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