Chiral macrocyclic CrIII salen complexes have been synthesized, characterized, and used as catalysts in the asymmetric aminolysis of aromatic ester epoxides with various anilines to prepare the β‐amino‐α‐hydroxyl esters in very good yield (up to 95 %) along with high diastereo‐ and enantioselectivity (dr>99/1, ee up to 96 %) under the optimized condition particularly with CrIII complex 4, which was
已合成,表征了手性大环Cr III salen配合物,并用作各种
苯胺的芳香族酯
环氧化物的不对称
氨解中的催化剂,制备了β-
氨基-α-羟基酯,收率很高(高达95%),而且在优化的条件下,尤其是使用Cr III配合物4时,具有很高的非对映选择性和对映选择性(dr > 99/1,ee高达96%),有效地循环了四次。