Organocatalytic enantioselective synthesis of quinolizidine alkaloids (+)-myrtine, (−)-lupinine, and (+)-epiepiquinamide
作者:Santos Fustero、Javier Moscardó、María Sánchez-Roselló、Sonia Flores、Marta Guerola、Carlos del Pozo
DOI:10.1016/j.tet.2011.07.017
日期:2011.9
quinolizidine alkaloids (+)-myrtine, (−)-lupinine, and (+)-epiepiquinamide is described. It involved, as the key step, an enantioselective intramolecular aza-Michael reaction (IMAMR) catalyzed by Jørgensen catalyst I, affording the common precursor with high enantioselectivity. This compound was subsequently transformed into the three alkaloids in a highly diastereoselective manner.
描述了喹唑烷生物碱(+)-美金汀,(-)-羽扇豆碱和(+)-表位表喹酰胺的有机催化合成。作为关键步骤,它涉及由约根森催化剂I催化的对映选择性分子内aza-Michael反应(IMAMR),从而提供具有高对映选择性的常见前体。该化合物随后以高度非对映选择性的方式转化为三种生物碱。