Studies toward the Synthesis of an Oxazole-Based Analog of (−)-Zampanolide

Studies are described toward the synthesis of an oxazole-based analog of (−)-zampanolide (2). Construction of (−)-dactylolide analog 22 was achieved via alcohol 5 and acid 4 through esterification and Horner–Wadsworth–Emmons (HWE)-based macrocyclization; however, attempts to attach (Z,E)-sorbamide to 22 proved unsuccessful. The C(8)–C(9) double bond of the macrocycle was prone to migration into conjugation with the oxazole ring, which may generally limit the usefulness of zampanolide analogs with aromatic moieties as tetrahydropyran replacements. © 2021 American Chemical SocietyISSN:1523-7060ISSN:1523-705