The key intermediate 5 for synthesis of the contragestationallyactive diterpenoid grandiflorenic acid(1)and its analogues 2 and 3 wasprepared and an acetyl transp
Methyl methacrylate was anionically polymerized in the presence of chiral ligands, e. g. (+)-DDB and (-)-Sp. The polymers thus formed were optically inactive du
A lignan diol (1) was isolated from Schisandra rubriflora Rhed et Wils. It is racemic, with RS, RS, RS, SR configurations for the four consecutive asymmetric ce