Dp. Provencal et al., RHIZOXIN SYNTHETIC STUDIES .2. SYNTHESIS OF THE LEFT HAND [C(10) TO C(19)] AND POLYENE FRAGMENTS, Tetrahedron letters, 36(34), 1995, pp. 6033-6036
The syntheses of the central core and the polyene fragments of the ant
itumor macrolide rhizoxin have been achieved in an efficient manner. T
he core has been prepared in enantiopure form via an asymmetric allyla
tion/aldol protocol. The selective oxidation of dienes was studied and
realized in fair yield to generate the requisite aldol precursor. The
oxazole polyene fragment was generated in six steps from serine.