A convergent total synthesis of leustroducsin B (1), which is known to exhibit a variety of biological activities, was successfully carried out. Notable features of our synthesis include construction of the C8 stereocenter by lipase-mediated desymmetrization of meso-diol 4 (90.2% ee) and preparation of the C9-C11 anti-diol moiety by the addition of alkynylzinc reagent 20 to the aldehyde 19. Furthermore, a new diol protecting group, p- ...
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![(5S,6S)-6-((E)-2-{(2R,4R,5R)-5-allyl-2-(4-{[tert-butyl(dimethyl)silyl]oxy}phenyl)-4-[2-(trityloxy)ethyl]-[1,3]dioxolan-4-yl}vinyl)-5-ethyl-5,6-dihydro-2H-pyran-2-one结构式](https://image.chemsrc.com/caspic/159/521274-29-3.png)
![ethyl (2Z,4S,5S,6E)-7-{(2R,4R,5R)-5-allyl-2-(4-{[tert-butyl(dimethyl)silyl]oxy}phenyl)-4-[2-(tritylioxy)ethyl]-[1,3]dioxolan-4-yl}-4-ethyl-5-hydroxyhepta-2,6-dienoate结构式](https://image.chemsrc.com/caspic/197/521274-28-2.png)
