From Planning to Optimization: Total Synthesis of Valerenic Acid and Some Bioactive Derivatives
作者:Juergen Ramharter、Johann Mulzer
DOI:10.1002/ejoc.201101834
日期:2012.4
The streamlined synthesis implements a new one-pot reaction, which combines the addition of a Grignard species with an acid-catalyzed isomerization of the intermediate allylic alcohol. Further highlights are a stereo- and regioselective hydroxy-directed Diels–Alder reaction, a hydroxy-directed hydrogenation, and a final Negishi coupling reaction. After optimization of our synthesis, the preparation