The reversible hydrolysis of β-arylaminoacrolein to form arylamine and malonaldehyde was studied kinetically. The catalytic coefficient of hydronium ions (kH+) and dissociation constant of the conjugate acid of β-arylaminoacrolein (KBH+) were evaluated. Hammett plots for kH+ and for KBH+ were linear. The values of log kH+ and pKBH+ were expressed by the equations log kH+=1.38σ-2.81 and pKBH+=-1.20σ+0.90, respectively. The reversible hydrolysis of malonaldehyde dianil to form β-arylaminoacrolein and arylamine was examined in relation to that of β-arylaminoacrolein. The preparation of β-arylaminoacrolein by hydrolysis of malonaldehyde dianil was achieved under weakly acidic conditions.
β-芳基
氨基
丙烯醛的可逆
水解生成芳胺和
丙二醛的动力学研究。评估了氢离子催化系数 (kH+) 和 β-芳基
氨基
丙烯醛的共轭酸的离解常数 (KBH+)。kH+ 和 KBH+ 的 Hammett 图呈线性。log kH+ 和 pKBH+ 的值分别通过方程 log kH+=1.38σ-2.81 和 pKBH+=-1.20σ+0.90 表示。
丙二醛二苯胺的可逆
水解生成 β-芳基
氨基
丙烯醛和芳胺的过程也被考察,以其与 β-芳基
氨基
丙烯醛的
水解进行比较。在弱酸性条件下,通过
丙二醛二苯胺的
水解成功制备了 β-芳基
氨基
丙烯醛。