Asymmetric syntheses of lindenane sesquiterpenoid [4 + 2] head-to-back dimers, namely sarbracholide and shizukaol B, are presented herein. In this synthesis, an MTBD-mediated one-pot Z-type elimination/lactonization was performed to install an α,β-unsaturated lactone, while a biomimetic [4 + 2] dimerization between a triene and dienophile was carried out to establish the dimers.
G. Huang, Z. Huang, X. Ma, Z. Feng, F. Yuan, S. Qin, S. Fu and B. Liu, Org. Chem. Front., 2023, 10, 3591 DOI: 10.1039/D3QO00643C
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