CLERODANE AND ENT-HALIMANE DITERPENES FROM POLYALTHIA-LONGIFOLIA

Authors
HARA N ASAKI H FUJIMOTO Y GUPTA YK SINGH AK SAHAI M
Citation
N. Hara et al., CLERODANE AND ENT-HALIMANE DITERPENES FROM POLYALTHIA-LONGIFOLIA, Phytochemistry, 38(1), 1995, pp. 189-194
Citations number
22
Categorie Soggetti
Plant Sciences
Journal title
Phytochemistry → ACNP
ISSN journal
00319422
Volume
38
Issue
1
Year of publication
1995
Pages
189 - 194
Database
ISI
SICI code
0031-9422(1995)38:1<189:CAEDFP>2.0.ZU;2-R
Abstract
A hexane extract of the stem bark of Polyalthia longifolia furnished n ine new clerodane and ent-halimane diterpenes, i.e. 16-hydroxycleroda- 4(18),13-dien-16,15-olide, 16-oxocleroda-4(18),13E-dien-15-oic acid, c leroda-4(18),13-dien-16,15-olide, 16-hydroxy-ent-halima-5(10),13-dien- 16, 5-olide, 16-oxo-ent-halima-5(10),13E-dien-15-oic acid, ent-halima- 1(10),13E-dien-16,15-olide, 16-oxo-ent-halima-5(10),13E-dien-15-oic ac id, ent-halima-5(10),13-dien-16,15-olide and ent-halima-5(10),13E-dien -16,15-olide, along with five known clerodane diterpenes. The structur es of these compounds were elucidated by spectroscopic methods. The 13 E configuration of two of the new ent-halimanes and one of the known c lerodanes was firmly established by NOE experiments.