Enantiopure substituted imidazoles obtained by enzymatic kinetic resolution can be promising candidates as co-catalysts for aldol reactions catalysed by (L)-proline. These additives seem to form supramolecular complexes with the catalyst through the formation of H-bonds, leading to significant improvement in both the reaction rates and selectivity of the reaction. Herein, we present our results on the use of these substituted trans-2-imidazoyl-cycloalkanols as additives for the (L)-proline catalyzed direct aldol reaction between ketones and aromatic aldehydes.
通过酶动力学分辨率获得的手性纯替代
咪唑可以作为(L)-脯
氨酸催化的醛醇反应的共催化剂,展现出良好的前景。这些添加剂似乎通过形成氢键与催化剂形成超分子复合物,从而显著提高了反应速率和选择性。在此,我们提出了使用这些替代的反式-2-
咪唑基-环烷醇作为(L)-脯
氨酸催化的酮与芳香醛之间直接醛醇反应的添加剂的结果。