Chiral imidates as a new class of nitrogen-based chiral ligands: synthesis and catalytic activity in asymmetric aziridinations and diethylzinc additions
作者:Timothy Noël、Koen Vandyck、Koen Robeyns、Luc Van Meervelt、Johan Van der Eycken
DOI:10.1016/j.tet.2009.08.028
日期:2009.10
Chiral imidates were efficiently synthesized in one step and with high yields (seven examples). These chiral imidates were used as ligands in the Cu(I)-catalyzed asymmetric aziridination of methyl cinnamate and in the asymmetric diethylzinc additions to benzaldehyde as a proof of principle. The imidate catalyst system showed high catalytic activities and induced encouraging selectivities. An X-ray
一步有效地合成高产率的手性酰亚胺化物(七个实施例)。这些手性酰亚胺被用作肉桂酸甲酯的Cu(I)催化的不对称叠氮基化和苯甲醛的不对称二乙基锌加成中的配体作为原理证明。亚氨酸酯催化剂体系显示出高催化活性并引起令人鼓舞的选择性。包括对亚氨酸酯-Cu(I)配合物的X射线结构分析,显示了扭曲的四面体排列,金属周围有两个双齿配体分子。