Enantioselective construction of 2,5-dihydropyrrole skeleton with quaternary stereogenic center via catalytic asymmetric 1,3-dipolar cycloaddition involving α-arylglycine esters
作者:Feng Shi、Gui-Juan Xing、Wei Tan、Ren-Yi Zhu、Shujiang Tu
DOI:10.1039/c2ob26566d
日期:——
A catalyticasymmetricconstruction of synthetically and biologically important 2,5-dihydropyrrole scaffolds with concomitant creation of multiple chiral carbon centers including one quaternary stereogenic center in high yields (up to 99%) and excellent enantioselectivities (up to 99% ee) has been established via an organocatalytic 1,3-dipolarcycloaddition using α-arylglycine esters as azomethine precursors
Cu(OAc)<sub>2</sub>/FOXAP complex catalyzed construction of 2,5-dihydropyrrole derivatives via asymmetric 1,3-dipolar cycloaddition of azomethine ylides to ethynyl ketones
作者:Fei-Fei Tang、Wu-Lin Yang、Xingxin Yu、Wei-Ping Deng
DOI:10.1039/c5cy00422e
日期:——
Catalytic asymmetric1,3-dipolarcycloaddition of azomethineylides to ethynyl ketones catalyzed by the Cu(OAc)2/FOXAP (ferrocenyl oxazolinylphosphine) complex was developed, affording 2,5-dihydropyrrole derivatives in good to excellent yields (up to 99%) and excellent levels of enantioselectivities (up to 98% ee). This highly efficient chiral N,P-ligand/Cu(OAc)2 catalytic system was also applicable