A fully stereocontrolled total synthesis of (+)-leucascandrolide A
作者:Ian Paterson、Matthew Tudge
DOI:10.1016/s0040-4020(03)00814-7
日期:2003.8
cytotoxic 18-membered macrolide from the calcareous sponge Leucascandra caveolata, starts out with a Jacobsen asymmetric hetero Diels–Alder reaction to configure the 2,6-cis-tetrahydropyran ring. All the remaining oxygenated stereocentres are introduced with high selectivity by relying on substrate-based control. An efficient endgame depends on two Mitsunobu reactions, the first to close the macrolactone
Leucascandrolide A: A Second Generation Formal Synthesis
作者:David R. Williams、Samarjit Patnaik、Scott V. Plummer
DOI:10.1021/ol036071v
日期:2003.12.1
A convergent, second generation formal synthesis of (+)-Leucascandrolide A (1) has been efficiently achieved by providing a flexible, enantiocontrolled strategy toward the bioactive macrolactone component. Advancements for stereocontrol in asymmetric allylation methodology are discussed. Efforts feature novel results for reductions using the Terashima hydride reagent. [structure: see text]