2 NOVEL DIELS-ALDER REACTION-TYPE DIMERIC PINGUISANE SESQUITERPENOIDSAND RELATED-COMPOUNDS FROM THE LIVERWORT PORELLA-ACUTIFOLIA SUBSP TOSANA

Authors
HASHIMOTO T IRITA H TANAKA M TAKAOKA S ASAKAWA Y
Citation
T. Hashimoto et al., 2 NOVEL DIELS-ALDER REACTION-TYPE DIMERIC PINGUISANE SESQUITERPENOIDSAND RELATED-COMPOUNDS FROM THE LIVERWORT PORELLA-ACUTIFOLIA SUBSP TOSANA, Tetrahedron letters, 39(19), 1998, pp. 2977-2980
Citations number
5
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
39
Issue
19
Year of publication
1998
Pages
2977 - 2980
Database
ISI
SICI code
0040-4039(1998)39:19<2977:2NDRDP>2.0.ZU;2-X
Abstract
From the ether extract of the liverwort Porella acutifolia subsp. tosa na, two new pinguisane-type and two novel Diels-Alder reaction-type di meric pinguisane sesquiterpenoids have been isolated. Their absolute s tructures were determined by a combination of 2D-NMR and CD spectra, X -ray crystallographic analysis, modified Mosher's method, and chemical degradation. (C) 1998 Elsevier Science Ltd. All rights reserved.