20-Hydroxyimino-5 alpha-pregna-9(11),16-dien-3 beta-yl acetate and 17-oxo-5 alpha-androst-9(11)-en-3 beta-yl acetate

Authors
de Armas, HN Peeters, OM Blaton, NM De Ranter, CJ Garcia, JAR Moreno, MR Ginarte, YMA
Citation
Hn. De Armas et al., 20-Hydroxyimino-5 alpha-pregna-9(11),16-dien-3 beta-yl acetate and 17-oxo-5 alpha-androst-9(11)-en-3 beta-yl acetate, ACT CRYST C, 56, 2000, pp. E582-E583
Citations number
16
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
ISSN journal
01082701 → ACNP
Volume
56
Year of publication
2000
Part
12
Pages
E582 - E583
Database
ISI
SICI code
0108-2701(200012)56:<E582:2ABAA1>2.0.ZU;2-I
Abstract
In the title compounds, C23H33NO3 and C21H30O3, respectively, the ester lin kage in ring A is equatorial. In these steroids, the six-membered rings A a nd B have chair conformations, but ring C can be better described as a half -chair. The five-membered ring D adopts a 14 alpha -envelop conformation. T he A/B, B/C and C/D ring junctions are trans.