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6?-Chloro-5?-hydr-oxy-20-oxopregnan-3?-yl acetate.

ABSTRACT: The title steroid, C(23)H(35)ClO(4), is a pregnane derivative prepared by ring opening of the corresponding 5?,6?-ep-oxy steroid with BiCl(3). There are two symmetry-independent mol-ecules in the asymmetric unit that show no significant differences concerning bond lengths and angles. The conformation of the six-membered rings in both mol-ecules is close to a chair form, while the five-membered ring adopts an envelope conformation. All rings in both mol-ecules are trans-fused. The mol-ecules are held together by an extensive O-H?O hydrogen-bonding network.

SUBMITTER: Pinto RM 

PROVIDER: S-EPMC2962054 | biostudies-literature | 2008 Jul

REPOSITORIES: biostudies-literature

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6β-Chloro-5α-hydr-oxy-20-oxopregnan-3β-yl acetate.

Pinto Rui M A RM   Salvador Jorge A R JA   Paixão José A JA   Matos Beja Ana A   Ramos Silva Manuela M  

Acta crystallographica. Section E, Structure reports online 20080705 Pt 8

The title steroid, C(23)H(35)ClO(4), is a pregnane derivative prepared by ring opening of the corresponding 5α,6α-ep-oxy steroid with BiCl(3). There are two symmetry-independent mol-ecules in the asymmetric unit that show no significant differences concerning bond lengths and angles. The conformation of the six-membered rings in both mol-ecules is close to a chair form, while the five-membered ring adopts an envelope conformation. All rings in both mol-ecules are trans-fused. The mol-ecules are  ...[more]

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