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Acta Cryst. (2003). E59, o1745-o1747  [ doi:10.1107/S1600536803022955 ]

17-Ethynyl-3,17[alpha]-dimethoxy-5[beta]-estra-1,3,5(10)-triene

M. I. Choudhary, S. G. Musharraf, S. Anjum, A. A. Rahman, H.-K. Fun and Atta-ur-Rahman

Abstract: The title compound, C22H28O2, was synthesized from 17[alpha]-ethynylestradiol in 86% yield. The X-ray structure determination shows that, in the steroid nucleus, one of the cyclohexane rings adopts a half-chair conformation and the other shows a chair conformation. The cyclopentane ring adopts an envelope conformation. In the crystal structure, symmetry-related molecules exist as C-H...O hydrogen-bonded dimers.

Online 23 October 2003


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