FLOW SHEET benzylidene-n-propyl-(and n-butyl)-aminopropylamine, none of the Schiff bases was isolated. Attempts to purify several of them by vacuum distillation resulted in considerable decomposition. It has been reported that trirnethylene-1, 3-diamines3 and 1, 3- dianilin~ propane~ react with aldehydes to yield hexahydropyrimidines. In these instances, both amino groups were either primary or secondary. With a primary-secondary diamine, ...
