Abstract
The neutral extractives from the bark of western red cedar (Thuja plicata Donn) contained, among other components, three alcohols. One was the known diterpene alcohol, isopimarinol, the other two were the new Δ8(14),15-4α- and Δ8(14),15-4β-hydroxy-18-norisopimaradienes. The syntheses of these two alcohols are described. The greater amount of the 4α compound found in nature, and its relative ease of synthesis compared to the 4β isomer, showed it to be formed preferentially.
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