Abstract
AbstractAn unnatural tricyclic oxaterpenoid, obtained by treatment of the sesquiterpene synthase presilphiperfolan‐8β‐ol synthase (BcBOT2) with an unnatural farnesyl pyrophosphate ether derivative, itself obtained by chemical synthesis, was converted in oxidation studies as part of a broad screening program by selected unspecific peroxygenases (UPOs). Product analysis revealed that Agrocybe aegerita UPO, its mutant PaDa‐I, and two commercial ones, UPO54 and UPO49, provided new oxidation products with sufficient efficiency for subsequent upscaling that allowed product isolation and structure elucidation. As such new terpene‐based oxiranes and hemiacetals were formed by UPO‐mediated epoxidations and CH‐activation. The structure elucidation was further supported by comparison with products generated by chemical oxidation.
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