Judicious choice of precipitation conditions can lead to self-sorting of equilibrating mixtures of aromatic aldehydes and substituted anilines into a handful of imine products. The selectivity of this process is caused by the solubility differences among possible imines in the EtOH–H2O solvent mixtures used in precipitation.
明智地选择沉淀条件,可以使处于平衡状态的混合物中芳香醛和取代
苯胺自发地分离成少量的
亚胺产物。这一过程的选择性源于在用来沉淀的
乙醇-
水溶剂混合物中可能形成的
亚胺之间的溶解度差异所致。