Formal synthesis of brefeldin A from (+)-limonen-10-ol.

Abstract
The conversion of naturally abundant (+)-limonen-10-ol (2) into the synthetic intermediate (3) for brefeldin A is described. The cis-3, 4-disubstituted cyclopentanone (4), which was easily obtained from 2 by Rh (I)-catalyzed cyclization reaction via the 4-pentenal derivative, could be converted to the target compound 3 via the appropriate modification of substituents on the five-membered ring.

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