Methyl 4 beta-bromo-7 alpha-cathyloxy-3-oxo-5 beta-cholanoate

Authors
de Armas, HN Blaton, NM Peeters, OM De Ranter, CJ Hernandez, RP Manchado, FC Gil, RP
Citation
Hn. De Armas et al., Methyl 4 beta-bromo-7 alpha-cathyloxy-3-oxo-5 beta-cholanoate, ACT CRYST C, 55, 1999, pp. 599-601
Citations number
15
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
ISSN journal
01082701 → ACNP
Volume
55
Year of publication
1999
Part
4
Pages
599 - 601
Database
ISI
SICI code
0108-2701(19990415)55:<599:M4BAB>2.0.ZU;2-7
Abstract
In the title compound, methyl 4 beta-bromo-7 alpha-ethoxycarbonyloxy-3-oxo- 5 beta-cholanoate, C28H43BrO6, the Br-C4 bond is oriented equatorially and (-)-antiperiplanar with respect to the C5-C10 bond. The six-membered rings (A, B and C) have the usual chair conformations, while the five-membered ri ng (D) adopts a distorted 13 beta,14 alpha-half-chair conformation. The A/B ring junction is cis, and the B/C and C/D ring junctions are both trans.