New picropodophyllin analogs via palladium-catalyzed allylic alkylation-Hiyama cross-coupling sequences
(Chemical Equation Presented) Unsaturated malonyl esters underwent Pd-catalyzed intramolecular allylic alkylation to give 4-vinyl-substituted γ-lactones. In contrast to the formerly studied cyclization of malonamides, this reaction could be achieved only
Vitale, Maxime,Prestat, Guillaume,Lopes, David,Madec, David,Kammerer, Claire,Poli, Giovanni,Girnita, Leonard