Stereocontrolled total synthesis of (+)-concanamycin F: the strategic use of boron-mediated aldol reactions of chiral ketones
A highly stereocontrolled total synthesis of the 18-membered macrolide (+)-concanamycin F, a potent inhibitor of vacuolar ATPases, is described that proceeds in 5.8% yield over 26 steps. The three key fragments, C1-C13 vinyl iodide, C14-C22 vinyl stannane and C23-C28 aldehyde, were efficiently constructed using asymmetric boron-mediated aldol reactions of appropriate chiral ketone building blocks. The nature of the silyl protection of the C7/C9 hydroxyls proved to be critical for achieving...[Show more]
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