ABSOLUTE STEREOSTRUCTURE OF 13,17-EPOXY-ALISOL-B-23-ACETATE ISOLATED FROM ALISMA-ORIENTALE

Authors
YAMAGUCHI K IDA Y NAKAJIMA Y SATOH Y SHOJI J
Citation
K. Yamaguchi et al., ABSOLUTE STEREOSTRUCTURE OF 13,17-EPOXY-ALISOL-B-23-ACETATE ISOLATED FROM ALISMA-ORIENTALE, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 736-738
Citations number
10
Categorie Soggetti
Crystallography
Journal title
Acta crystallographica. Section C, Crystal structure communications → ACNP
ISSN journal
01082701
Volume
50
Year of publication
1994
Part
5
Pages
736 - 738
Database
ISI
SICI code
0108-2701(1994)50:<736:ASO1IF>2.0.ZU;2-Z
Abstract
The absolute configration of the epoxy group in 17beta:-24(R),25-diepo xy-1beta-hydroxydammar-3-one 23(S)-acetate, C32H50O6, m.p. 472-474 K, [alpha]D + 139.4-degrees (c = 0.96, CHCl3), isolated from Alisma orien tale rhizomes, was established to be the beta orientation by X-ray cry stallographic analysis. The A, B and C rings have chair forms. An inte rmolecular hydrogen bond is observed between O2 and O6' with a distanc e of 3.148 (6) angstrom.