Man. Zoutani et al., Approach towards the total synthesis of rhizoxin: Enantioselective preparation of the lactone core, SYNLETT, (6), 2001, pp. 769-772
The construction of the C1-C10 lactone core of rhizoxin, a 16-membered anti
tumoral macrolide, is reported. The strategy is based on the installation o
f the C7 and C8 asymmetric centers with a Brown allylation reaction. The C5
asymmetric carbon was controlled during a lactonisation step, leading to t
he equatorial chain at C5. Homologation sequences at C3 and C9 were perform
ed via a Wadsworth-Emmons and a Takai reaction, respectively.