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Title: | 16α,17α-Ep-oxy-5α-hydr-oxy-6β-nitrooxy-20-oxopregnan-3β-yl acetate | Authors: | Pinto, R. M. A. Beja, A. Matos Salvador, J. A. R. Paixão, J. A. |
Keywords: | single-crystal X-ray study; T = 223 K; mean (C–C) = 0.003 A°; R factor = 0.043; wR factor = 0.118; data-to-parameter ratio = 9.8 | Issue Date: | 14-May-2009 | Publisher: | International Union of Crystallography | Project: | SFRH/ BD/18013/2004 | Serial title, monograph or event: | Acta Crystallographica Section E: Structure Reports Online | Volume: | 65 | Issue: | Pt 6 | Abstract: | The title steroid, C(23)H(33)NO(8), is a pregnane derivative obtained regio-, stereo- and chemoselectively from the ring opening of the corresponding 5α,6α;16α,17α-diepoxide with bis-muth(III) nitrate. There are two symmetry-independent mol-ecules in the asymmetric unit that show no significant differences concerning bond lengths and angles. All rings are trans-fused. The conformations of the six-membered rings are close to chair forms, while the five-membered ring adopts an envelope conformation. The mol-ecules are held together by an extensive O-H⋯O hydrogen-bonding network of chains runnning along the a axis. | URI: | https://hdl.handle.net/10316/110229 | ISSN: | 1600-5368 | DOI: | 10.1107/S1600536809016997 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais FFUC- Artigos em Revistas Internacionais |
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1617Epoxy5hydroxy6nitrooxy20oxopregnan3yl-acetateActa-Crystallographica-Section-E-Structure-Reports-Online.pdf | 351.03 kB | Adobe PDF | View/Open |
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