A convergent hetero-diels-alder strategy for asymmetric access to a lactone containing two lipidic chains

摘要

Eu(fod) _3-catalyzed heterocycloaddition of chiral β-alkyl-N-vinyl-1,3-oxazolidin-2-ones with a heterodiene bearing a lipidic chain led to heterocycloadducts in high yield with excellent endo and facial selectivities. An original lipidic lactone, a potent precursor of a ceramide analog, was obtained in seven steps from the adduct in a convergent manner after appropriate functionalization. Eu(fod) _3-catalyzed heterocycloaddition of chiral β-alkyl-N-vinyl-1,3-oxazolidin-2-ones with a heterodiene bearing a lipidic chain led to heterocycloadducts in high yield with excellent endo and facial selectivities. An original lipidic lactone, a potent precursor of a ceramide analog, was obtained in seven steps from the adduct in a convergent manner after appropriate functionalization.