C2-Symmetric (S)-prolinamides modified with ionic groups and bearing achiral diamine units were synthesized. Their potency as reusable organocatalysts for asymmetric aldol reactions of cycloalkanones or methyl ketones with aromatic (heteroaromatic) aldehydes in the presence of water was demonstrated. The 1,4-diaminobenzene-derived catalyst exhibited good catalytic performance and excellent recoverability over
合成了用离子基团修饰并带有非手性二胺单元的 C2-对称 (S)-脯
氨酰胺。证明了它们作为可重复使用的有机催化剂的效力,用于环烷酮或甲基酮与芳香(杂芳香)醛在
水存在下的不对称醛醇反应。在所研究的条件下,1,4-二
氨基苯衍生催化剂在至少 15 个反应-再生循环中表现出良好的催化性能和优异的可回收性。