Abstract
The total synthesis of the HCl salts of (−)-jaspine B ent-1 and its 4-epi-congener ent-4 was accomplished starting from the common template 13 derived from d-xylose. The cornerstone of our synthesis was [3,3]-heterosigmatropic rearrangements, which effectively provided scaffolds with a chiral amino group. A subsequent Wittig olefination installed a C14 alkyl side chain and acid-mediated ring-closing reaction established the tetrahydrofuran core.
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