Home Physical Sciences The crystal structure of the formamide solvate of (17b)-estra-1,3,5(10)-triene-3,17diol, C19H27NO3
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The crystal structure of the formamide solvate of (17b)-estra-1,3,5(10)-triene-3,17diol, C19H27NO3

  • Hui P. Wang , Juan Xu , Li F. Ning , Peng Li and Xiao F. Chen EMAIL logo
Published/Copyright: January 29, 2018

Abstract

C19H27NO3, orthorhombic, P212121 (no. 19), a = 8.1564(16) Å, b = 16.937(3) Å, c = 24.686(10) Å, V = 3410.3(12) Å3, Z = 8, Rgt(F) = 0.0651, wRref(F2) = 0.1345, T = 153(2) K.

CCDC no.:: 1561687

The crystal structure is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal:Block, colorless
Size:0.21 × 0.20 × 0.160 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:0.08 mm−1
Diffractometer, scan mode:R-AXIS IV, φ and ω-scans
2θmax, completeness:27.5°, >99%
N(hkl)measured, N(hkl)unique, Rint:14062, 7705, 0.041
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 7043
N(param)refined:417
Programs:CrystalClear [1], SHELX [2]
Table 2:

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

AtomxyzUiso*/Ueq
O10.1666(3)0.42724(18)0.70762(10)0.0375(7)
H10.21010.39380.72820.045*
O20.5540(3)0.34734(17)0.28128(10)0.0352(6)
H20.45910.33350.27210.042*
C10.2222(4)0.4127(2)0.65534(15)0.0286(8)
C20.1099(4)0.4113(2)0.61337(15)0.0299(8)
H2A−0.00260.42200.62000.036*
C30.1642(4)0.3939(2)0.56140(14)0.0269(8)
H30.08640.39220.53280.032*
C40.3288(4)0.3787(2)0.54957(14)0.0223(7)
C50.4412(4)0.3836(2)0.59240(14)0.0232(7)
C60.3864(4)0.4002(2)0.64469(14)0.0258(7)
H60.46340.40290.67350.031*
C70.6230(4)0.3732(2)0.58389(13)0.0255(7)
H7A0.66680.33920.61310.031*
H7B0.67700.42530.58690.031*
C80.6679(4)0.3367(2)0.52940(14)0.0246(7)
H8A0.78560.34620.52210.030*
H8B0.65060.27890.53110.030*
C90.5666(4)0.3707(2)0.48323(13)0.0209(7)
H90.58210.42920.48210.025*
C100.3842(4)0.3522(2)0.49354(14)0.0215(7)
H100.37550.29330.49360.026*
C110.2741(4)0.3804(2)0.44686(14)0.0260(7)
H11A0.27430.43880.44590.031*
H11B0.16030.36280.45370.031*
C120.3303(4)0.3489(2)0.39144(14)0.0273(8)
H12A0.31320.29100.39010.033*
H12B0.26290.37310.36250.033*
C130.5113(4)0.3671(2)0.38102(14)0.0229(7)
C140.6135(4)0.3359(2)0.42859(14)0.0233(7)
H140.58810.27820.43110.028*
C150.7918(4)0.3411(2)0.40810(14)0.0270(8)
H15A0.86100.29990.42510.032*
H15B0.83960.39360.41590.032*
C160.7767(4)0.3273(2)0.34592(15)0.0316(8)
H16A0.82390.37220.32560.038*
H16B0.83430.27830.33510.038*
C170.5914(4)0.3202(2)0.33516(14)0.0269(8)
H170.55840.26350.33840.032*
C180.5353(4)0.4560(2)0.37116(15)0.0287(8)
H18A0.49420.48570.40240.043*
H18B0.47490.47180.33860.043*
H18C0.65220.46720.36620.043*
O3−0.2784(3)0.62577(16)0.70504(10)0.0306(6)
H3A−0.20490.63550.72790.037*
O40.1323(3)0.63468(16)0.28115(9)0.0308(6)
H40.04690.60880.27440.037*
C19−0.0458(4)0.6299(2)0.64439(14)0.0257(7)
H190.02360.64690.67300.031*
C20−0.2094(4)0.6148(2)0.65495(14)0.0235(7)
C21−0.3103(4)0.5888(2)0.61324(15)0.0280(8)
H21−0.42240.57700.61990.034*
C22−0.2447(4)0.5802(2)0.56165(15)0.0263(7)
H22−0.31470.56340.53310.032*
C23−0.0802(4)0.5951(2)0.54997(14)0.0234(7)
C240.0188(4)0.6208(2)0.59268(14)0.0248(7)
C250.1959(5)0.6452(3)0.58398(15)0.0387(10)
H25A0.26440.61990.61220.046*
H25B0.20460.70310.58880.046*
C260.2648(4)0.6235(3)0.52854(14)0.0311(8)
H26A0.36430.65540.52130.037*
H26B0.29670.56710.52840.037*
C270.1390(4)0.6384(2)0.48406(13)0.0222(7)
H270.10130.69440.48630.027*
C28−0.0096(4)0.5834(2)0.49332(14)0.0240(7)
H280.03400.52820.49230.029*
C29−0.1364(4)0.5890(2)0.44789(14)0.0299(8)
H29A−0.18820.64190.44880.036*
H29B−0.22330.54920.45400.036*
C30−0.0595(5)0.5755(2)0.39185(14)0.0284(8)
H30A−0.01870.52060.38940.034*
H30B−0.14400.58290.36350.034*
C310.0812(4)0.6324(2)0.38191(14)0.0228(7)
C320.2079(4)0.6232(2)0.42772(13)0.0227(7)
H320.24170.56650.42730.027*
C330.3568(4)0.6699(2)0.40763(14)0.0300(8)
H33A0.45950.64920.42370.036*
H33B0.34630.72660.41670.036*
C340.3542(4)0.6570(2)0.34542(14)0.0284(8)
H34A0.35640.70820.32610.034*
H34B0.44980.62520.33380.034*
C350.1938(4)0.6129(2)0.33388(14)0.0257(7)
H350.21660.55490.33400.031*
C360.0172(5)0.7170(2)0.37607(15)0.0308(8)
H36A−0.02090.73610.41140.046*
H36B−0.07390.71790.35020.046*
H36C0.10560.75120.36290.046*
O50.2418(3)0.70941(16)0.74885(12)0.0366(6)
N10.3742(4)0.5928(2)0.73897(14)0.0397(8)
H1A0.28550.56540.74070.048*
H1B0.46710.56950.73490.048*
C370.3681(5)0.6702(2)0.74304(15)0.0305(8)
H370.46890.69820.74140.037*
O60.6207(3)0.45873(17)0.75526(12)0.0374(7)
N20.8359(4)0.3778(2)0.73670(13)0.0356(8)
H2B0.78190.33500.74250.043*
H2C0.93720.37550.72720.043*
C380.7644(5)0.4469(2)0.74186(15)0.0315(8)
H380.82960.49220.73460.038*

Source of material

(17b)-estra-1,3,5(10)-triene-3,17diol (formamide) solvate is easily available. (17b)-estra-1,3,5(10)-triene-3,17diol (50 mg) was dissolved in tetrahydrofuran (2 mL) at 50 °C, then 1 mL formamide was added to the above solution dropwise slowly. The solution was cooled at room temperature and then crystallized using a cold chamber for 3 days. Stirred and filtered to get the (17b)-estra-1,3,5(10)-triene-3,17diol(formamide) solvate.

Experimental details

Hydrogen atoms were obtained geometrically and treated as riding on the parent atoms or were constrained in the locations during refinements.

Discussion

(17b)-estra-1,3,5(10)-triene-3,17diol(estradiol) (systematic name: (8R,9S,13S,14S,17S)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol is a member of the estrogen family of hormones, which was widespread used in hormonal replacement therapy for the treatment of postmenopausal symptoms and the protection against long-term consequences of estrogen deficiency (osteoporosis and cardiovascular disease) [3, 4] . Polymorphism, which is produced when compound crystallizes in various solid phases that differ in crystal packing [5], [6], [7]. Polymorphs can have different mechanical, thermal, physical, and chemical properties, such as compressibility, melting point, crystal habit, color, density, dissolution rate, and solubility. These can have a great influence on the bioavailability, hygroscopicity, stability, filtration, and tableting processes of pharmaceutical materials [8, 9] . Drug crystallization has been reported in many transdermal matrix systems [10, 11] . Due to the low solubility of estradiol [12], supersaturated patches containing high drug concentrations are often required for obtaining sufficient therapeutic efficiency. Recent work on the crystallization of estradiol in transdermal patches has revealed that the drug possibly crystallizes in more than one polymorphic form in the patch when stored for extended periods of time [13]. So it would thus appear important to anticipate conditions that give rise to crystallization, the structure of the resulting crystals and, when necessary, possible ways of inhibiting crystallization. In the study on polymorphism of estradiol, we got the title solvate of the estradiol with formamide.

The asymmetric unit of the title contains two crystallographically independent molecules of estradiol and two formamide solvent molecules. The estradiol and formamide molecules are hydrogen-bonded via N—H⋯O and O—H⋯O bonds. These connections lead to a hydrogen bonded framework. Bond lengths and angels of all moieties are in the expected ranges.

Acknowledgements

Our research is supported by Key national research and development programmes (No. 2016YFC1000901).

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Received: 2017-8-25
Accepted: 2017-12-12
Published Online: 2018-1-29
Published in Print: 2018-3-28

©2018 Hui P. Wang et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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  60. Crystal structure of (N-(3-ethoxy-2-oxidobenzylidene)-4-fluorobenzohydrazonato-κ3N,O,O′)-diphenyltin(IV), C28H23FN2O3Sn
  61. Crystal structure of {N-(3-ethoxy-2-oxidobenzylidene)-4-fluorobenzohydrazonato-κ3O,N,O′}dimethyltin(IV), C18H19FN2O3Sn
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