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 asymmetric 1,3-dipolar cycloaddition of azomethine ylides 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
开发了由Cu(OAc)2 / FOXAP(二茂铁基恶唑啉基膦)络合物催化的甲亚胺烷基化物催化的不对称1,3-偶极环加成反应生成乙炔基酮,得到了具有良好收率(高达99%)的2,5-二氢吡咯衍生物和出色的对映选择性(高达98%ee)。这种高效的手性N,P-配体/ Cu(OAc)2催化体系也适用于α-芳基甘氨酸酯生成的偶氮甲亚胺的1,3-偶极环加成反应到炔酮上,从而提供了独家的季碳顺式-2, 5-二氢吡咯具有出色的对映选择性(89-92%ee)。