This intermediate was converted into " rac "-hirsutic acid C in seven more steps.
2.
For example, Trost and coworkers employed a Stetter reaction as one step in their synthesis of " rac "-hirsutic acid C . The intramolecular coupling of an aliphatic aldehyde with a tethered ?, ?-unsaturated ester led to the desired tricyclic 1, 4-dicarbonyl in 67 % yield.
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