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https://hdl.handle.net/10316/109825
Title: | 6-Methyl-ideneandrost-4-ene-3,17-dione | Authors: | Andrade, L. C. R. Almeida, M. J. M. Roleira, F. M. Fernandes Varela, Carla Lopes Tavares da Silva, E.J. |
Keywords: | single-crystal X-ray study; T = 293 K; mean (C–C) = 0.004 A°; R factor = 0.040; wR factor = 0.100; data-to-parameter ratio = 9.8 | Issue Date: | 1-Apr-2012 | Publisher: | International Union of Crystallography | Project: | project PEst-C/FIS/UI0036/2011 | metadata.degois.publication.title: | Acta Crystallographica Section E: Structure Reports Online | metadata.degois.publication.volume: | 68 | metadata.degois.publication.issue: | Pt 4 | Abstract: | In the title compound, C(20)H(26)O(2), which is the 6-methyl-ene derivative of androstenedione and a synthetic percursor of exemestane, the steroid A ring approximates to a sofa (or envelope) conformation, with the methyl-ene group adjacent to the link to the B ring lying out of the plane of the other atoms. The B and C rings have slightly flattened chair conformations and the D ring is an envelope, with the CH group forming the flap. In the crystal, mol-ecules are linked by two distinct C-H⋯O hydrogen bonds, involving acidic H atoms close to C=C and C=O double bonds. | URI: | https://hdl.handle.net/10316/109825 | ISSN: | 1600-5368 | DOI: | 10.1107/S1600536812013207 | Rights: | openAccess |
Appears in Collections: | FFUC- Artigos em Revistas Internacionais FCTUC Física - Artigos em Revistas Internacionais |
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