De Novo Asymmetric Syntheses of Muricatacin and Its Analogues via Dihydroxylation of Dienoates
摘要:
A short and highly efficient route to both enantiomers of muricatacin as well as the C-5-epimer has been developed. The key to the overall transformation is the highly regio- and enantioselective Sharpless asymmetric dihydroxylation of an (E,Z)-dienoate. The highly efficient stereoselective synthesis prepares (-)-muricatacin in seven steps and 66% overall yield.
Concise syntheses of the polyketide natural product (–)-muricatacin and (–)-( R , R )-L-factor (natural product enantiomer) were achieved in four steps by employing an organocatalytic asymmetric direct vinylogous aldol reaction of γ-crotonolactone and suitable aliphatic aldehydes as the key step.
聚酮化合物天然产物 (-)-muricatacin 和 (-)-( R , R )-L-因子(天然产物对映异构体)的简明合成是通过采用 γ-巴豆内酯和合适的脂肪醛作为关键步骤。