STRUCTURE OF A DIELS-ALDER ADDUCT AT A 5,7-DISUBSTITUTED THEBAINE DERIVATIVE

Authors
WOUDENBERG RH VANKONINGSVELD H MAAT L
Citation
Rh. Woudenberg et al., STRUCTURE OF A DIELS-ALDER ADDUCT AT A 5,7-DISUBSTITUTED THEBAINE DERIVATIVE, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 913-915
Citations number
8
Categorie Soggetti
Crystallography
Journal title
Acta crystallographica. Section C, Crystal structure communications → ACNP
ISSN journal
01082701
Volume
50
Year of publication
1994
Part
6
Pages
913 - 915
Database
ISI
SICI code
0108-2701(1994)50:<913:SOADAA>2.0.ZU;2-0
Abstract
The structure of (+)-ethyl oxy-6beta,14beta-ethenomorphinan-8beta-carb oxylate (3), C25H31NO5, is described. Diels-Alder reaction of the theb aine analogoue (-)-5beta-methyl-7-methoxy-6-demethoxythebaine (2), wit h ethyl propenoate gives rise to anomalous alpha-face approach of the dienophile, yielding the title compound (3), in which the etheno bridg e is at the 6beta,14beta position and the ethoxycarbonyl substituent i s at the 8beta position.