N-Benzylamines are prepared by a process in which
(i) in a first step, a benzaldehyde is reacted with a primary amine to give the imine and
(ii) in a second step, the imine is hydrogenated with hydrogen in the presence of a catalyst containing one or more metals of groups 8 to 10 of the Periodic Table of the Elements to give the N-benzylamine,
wherein the iminization (i) is carried out in a water-miscible solvent and the resulting water of reaction is not removed, and the hydrogenation (ii) is carried out in the imine solution obtained in the iminization (i) and containing water of reaction.
N-苄基胺是通过以下过程制备的:(i)在第一步中,
苯甲醛与一级胺反应生成
亚胺,(ii)在第二步中,在含有元素周期表8到10组中一个或多个
金属的催化剂存在下,
亚胺在
氢气存在下催化加氢生成N-苄基胺。其中,
亚胺化反应(i)在
水溶性溶剂中进行,反应产生的
水不去除,加氢反应(ii)在
亚胺溶液中进行,该溶液包含反应
水。