Aluminum Chloride as a Powerful Catalyst for the Preparation of<i>O</i>-Isopropylidene and<i>O</i>-Benzylidene Derivatives of Labdanes
作者:Bansi Lal、Ramesh M. Gidwani、R. H. Rupp
DOI:10.1055/s-1989-27370
日期:——
Polyhydroxylated labdanes were converted into their O-isopropylidene and O-benzylidene derivatives by use of the anhydrous aluminum chloride/ether/acetone system. The structure of the minor metabolite of 7-deacetylforskolin (1) was elucidated as 18-hydroxy-7-deacetylforskolin (3).