Toward the Synthesis of Norzoanthamine: Building Carbocyclic Core by a Transannular Michael Reaction Cascade
作者:Haoran Xue、Jiong Yang、Peddabuddi Gopal
DOI:10.1021/ol2024554
日期:2011.10.21
A 12-step synthesis of the ABC carbocyclic core of norzoanthamine is described. It features an organocatalyticasymmetric intramolecular aldolization to set the stereochemistry of the entire molecule, a fragment coupling by selective alkylation of a bis-enolate, and a transannular Michael reaction cascade for rapid and stereoselective synthesis of the polycyclic core.