NOVEL PROCESS FOR THE PREPARATION OF N,N'-DIALKYLALKANEDIAMINES

摘要

A process for the preparation of N,N'-dialkylalkanediamines by reacting a dihaloalkane with a lower alkylamine, characterized in that the reaction is conducted while the hold-up in the reaction system of a haloalkaneamine of general formula (4) which is formed as an intermediate product is controlled so that the molar ratio of the haloalkaneamine to the lower alkylamine may not exceed 0.002, whereby the formation of dialkyl cyclic diamines and trialkylalkanetriamines as by-products is inhibited to obtain the objective N,N'-dialkylalkanediamine in a high yield. In said formula R is lower alkyl; R1 and R2 are each hydrogen or lower alkyl; X is chlorine, bromine or iodine; and n is an integer of 2 to 6.