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Synthesis 1989; 1989(9): 711-713
DOI: 10.1055/s-1989-27370
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Aluminum Chloride as a Powerful Catalyst for the Preparation of O-Isopropylidene and O-Benzylidene Derivatives of Labdanes

Bansi Lal* , Ramesh M. Gidwani, R. H. Rupp
  • *Department of Chemistry, Hoechst Centre for Basic Research, Mulund (W), Bombay 400080, India
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Publication Date:
17 September 2002 (online)

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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).