Asymmetric synthesis of (+)-stagonolide C and (−)-aspinolide A via organocatalysis
作者:Anil M. Shelke、Varun Rawat、Gurunath Suryavanshi、Arumugam Sudalai
DOI:10.1016/j.tetasy.2012.10.007
日期:2012.12
A new enantioselectivesynthesis of two important fungal metabolites, (+)-stagonolide C and (−)-aspinolide A, has been described from readily available raw materials. Proline catalyzed asymmetric α-aminooxylation and Jorgensen’s epoxidation of aldehydes are the key reactions employed in the introduction of chirality. The formation of the 10-membered lactone core structure was finally accomplished via
The firsttotalsynthesis of aspinolide A has been achieved using ring-closing metathesis as a key step. The stereogenic centers were generated by means of hydrolytic kinetic resolution (HKR) of racemic epoxides.