Abstract

Studies on the synthesis of antifungal and anticancer natural product, pseudolaric acid B, have led to the enantioselective synthesis of di-epi-trans-fused [5–7]-bicyclic core skeleton. The synthesis was achieved in 10 linear steps, which features the Sharpless asymmetric epoxidation, cyanide-opening reaction of epoxide, and intramolecular [5 + 2] cycloaddition reaction as the key transformations. The stereochemistry was determined by the X-ray crystallographic analysis.

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