ISOMERIZATION OF DIMERIC 2,9-DISUBSTITUTED 1-OXA-QUINOLIZIDINE ALKALOIDS AND STRUCTURAL REVISION OF ARAGUSPONGINE-B AND ARAGUSPONGINE-E, ISOLATED FROM A MARINE SPONGE OF XESTOSPONGIA SP

Authors
KOBAYASHI M MIYAMOTO Y AOKI S MURAKAMI N KITAGAWA I IN Y ISHIDA T
Citation
M. Kobayashi et al., ISOMERIZATION OF DIMERIC 2,9-DISUBSTITUTED 1-OXA-QUINOLIZIDINE ALKALOIDS AND STRUCTURAL REVISION OF ARAGUSPONGINE-B AND ARAGUSPONGINE-E, ISOLATED FROM A MARINE SPONGE OF XESTOSPONGIA SP, Heterocycles, 47(1), 1998, pp. 195-203
Citations number
16
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Heterocycles → ACNP
ISSN journal
03855414
Volume
47
Issue
1
Year of publication
1998
Pages
195 - 203
Database
ISI
SICI code
0385-5414(1998)47:1<195:IOD21A>2.0.ZU;2-C
Abstract
Isomerization reaction of araguspongines B (1), D (2), and E (3) havin g dimeric 2,9-disubstituted 1-oxaquinolizidine moiety was studied in d etail. Conformational aspects of 1, 2, and 3 were also analyzed on the basis of NMR and X-ray crystallographic analysis. The C-9 stereochemi stry of 1 and 3 was revised.