Synthesis of new pentacyclic chromophores through a highly regio- and diastereoselective cascade process
作者:Zein el abidine Chamas、Olivier Dietz、Emmanuel Aubert、Yves Fort、Victor Mamane
DOI:10.1039/c0ob00390e
日期:——
compounds incorporating a central 1,2-dihydropyridine core is obtained through a pseudo three-component reaction. Four new bonds and two stereocenters with trans relationship are produced during the cascade process under palladium catalysis.
Herein, we report the rhodium-catalyzeddominoarylation/cyclization reaction of unactivated internal alkynes to afford the optically active indenols in excellent yields (up to 92%) and extremely high enantioselectivities (up to 99% ee) in the presence of new amide substituted chiral diene ligands. Notably, a total of 21 new chiral diene ligands are synthesized, which are potential choices for other