Synthesis of tri-substituted furans: mild Ti(IV)-mediated couplings to acetals. Construction of the epoxy hemi-amido ketal of fusarin C
摘要:
Coupling of beta-keto amides and beta-keto esters to 2-alkoxy methyl furanosides with TiCl4 directly furnishes tri-substituted furans. The epoxy hemi-amido ketal ring system of fusarin C is constructed in two steps using this methodology.