Synthesis of the C16−C28 Spiroketal Subunit of Spongistatin 1 (Altohyrtin A): The Pyrone Approach
作者:Michael T. Crimmins、Jason D. Katz
DOI:10.1021/ol005605e
日期:2000.4.1
The synthesis of the CD spiroketal fragment of spongistatin1 (altohyrtin A) has been accomplished utilizing the addition of a metalated pyrone to an aldehyde and subsequent acid-catalyzed spirocyclization. A stereoselective hydrogenation and subsequent conformational inversion establish the C19 stereocenter and the axial-equatorial spiroketal center.