The first total synthesis of the polyketide apiosporic acid is presented. Key steps are a Julia–Kocienski olefination, a Suzuki–Miyaura cross-coupling, and an intramolecular Diels–Alder reaction. The absoluteconfiguration of the natural product was determined.
Total Synthesis and Proof of Relative Stereochemistry of (−)-Aureonitol
作者:Peter J. Jervis、Liam R. Cox
DOI:10.1021/jo801338t
日期:2008.10.3
Two trisubstituted epimeric tetrahydrofurans, 1 and 2, have been synthesized in order to confirm the relative stereochemistry in the natural product aureonitol. The key step in the synthesis of 1 and 2 involved a stereoselective intramolecular allylation of an allylsilane with an aldehyde, which introduced the stereotriad in the five-membered ring. The major tetrahydrofuran diastereoisomer 18 from