Abstract
The crystal structure of the title compound has been determined by X-ray analysis. Crystal data: triclinic,P¯1, C20H22O4,M r =326,39,a=8.296(1),b=10.704(2),c=11.186(1) Å,α=112.58(1),β=100.81(1), γ=95.79(1)°,V c =884.38(8) Å3,D x =1.225 g·cm−1,\(\bar \lambda \) (CuKα)=1.54178 Å,μ=6.05 cm−1,F(000)=384, room temperature,R=0.082 for 2410 unique reflections withF≥4 σ∥F∥. The conformation of the 3-methoxy-B-nor-5,7-seco-1,3,5(10), 9(11)-estrapent-14-en-17-one-8-β-ethyl carboxylate (1a) molecule is similar to that of the estranes. Since theB ring is not closed, the rotation around the C(9)-C(10) bond is possible and torsion of the molecule is observed.
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References
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Wieczorek, M.W., Karolak-Wojciechowska, J. & Bujacz, G.D. Crystal and molecular structure of 3-methoxy-B-nor-5,7-seco-1,3,5(10), 9(11)-estrapent-14-en-17-one-8-β-ethyl carboxylate. Journal of Crystallographic and Spectroscopic Research 18, 555–562 (1988). https://doi.org/10.1007/BF01161148
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DOI: https://doi.org/10.1007/BF01161148