Novel Sparteine-Mediated Enantio-Dichotomic Formal Synthesis of (R)-(−)- and (S)-(+)-Curcuphenol
摘要:
High and opposite enantiodiscriminations were observed between tertiary amides and secondary amides in the sparteine-mediated lateral metalation-allylation of 2-ethyl-m-toluamide derivatives (2a, 2e), The results described above have been applied for the formal synthesis of both enantiomers of curcuphenol. The brief mechanistic studies suggested that stereoinformation was introduced after the deprotonation step.
Novel Sparteine-Mediated Enantio-Dichotomic Formal Synthesis of (R)-(−)- and (S)-(+)-Curcuphenol
摘要:
High and opposite enantiodiscriminations were observed between tertiary amides and secondary amides in the sparteine-mediated lateral metalation-allylation of 2-ethyl-m-toluamide derivatives (2a, 2e), The results described above have been applied for the formal synthesis of both enantiomers of curcuphenol. The brief mechanistic studies suggested that stereoinformation was introduced after the deprotonation step.
Palladium-Catalyzed [3 + 2] Annulation of Aromatic Amides with Maleimides through Dual C–H Activation
作者:Gouranga Naskar、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.3c00251
日期:——
A palladium-catalyzed [3 + 2] annulation of substituted aromatic amides with maleimides providing tricyclic heterocyclic molecules in good to moderate yields through weak carbonyl chelation is reported. The reaction proceeds via a dual C–H bond activation where the first C–Hactivation takes place selectively at the benzylic position followed by a second C–H bond activation at the meta position to