Abstract Extraction of aerial parts of Pallenis spinosa and chromatographic separation have yielded a new germacranederivative and the known sesquiterpenes shiromool and α-cadinol.
Bioactive sesquiterpenes from Santolina rosmarinifolia subsp. Canescens. A conformational analysis of the germacrane ring
作者:Alejandro F. Barrero、M.Mar Herrador、Jose F. Quilez、Ramon Alvarez-Manzaneda、Dolores Portal、Jose A. Gavin、Dolores G. Gravalos、M.S.J. Simmonds、W.M. Blaney
DOI:10.1016/s0031-9422(99)00047-3
日期:1999.6
The hexane extract of aerial parts of Santolina rosmarinifolia subsp. canescens afforded eight new sesquiterpenes in addition to known compounds. Their structures were determined by spectroscopic methods and chemical transformations. The conformational analysis of the germacrane constituents was carried out by spectroscopic methods, including NMR at varying temperature and by molecular mechanics calculations. The antifeedant, antibacterial and antitumoral activity of selected compounds has been tested. (C) 1999 Elsevier Science Ltd. All rights reserved.
Biomimet1c cyclization of 4β, 5α-epoxy-6β-acetoxy--germacr-1(10)-ene to form -( 1β-h ; 5β-h)-guaianes