Structure Revision and Synthesis of a Novel Labdane Diterpenoid from <i>Zingiber ottensii</i>
作者:John Boukouvalas、Jian-Xin Wang
DOI:10.1021/ol8011919
日期:2008.8.21
The structure of ottensinin, a recently reported constituent of the medicinal plant Zingiber ottensii, was revised by re-evaluation of available NMR data from alpha-ylidenebutenolide 1 to gamma-pyrone 2, whose rearranged labdane skeleton is unprecedented. Structure 2 was proven by synthesis from (+)-sclareolide (nine steps, 27% overall yield) and was further validated by X-ray diffraction analysis