Process for the synthesis of N-substituted cyclic alkylene ureas

摘要

The invention relates to a process for the synthesis of N-substituted cyclic alkylene ureas by reacting a multifunctional aliphatic amine A having at least two amino groups which may be primary or secondary, at least one of which is a primary amino group, —NH2, and at least one of which is a secondary amino group, >NH, the other hydrogen group whereof having been substituted by a hydrocarbyl group which in turn may be substituted by a hydroxyl group, or an amino group, or a carboxyl group, or a ketone carbonyl group, or a hydrazide or hydrazone group, or a mercaptan group, and at least one further functional group selected from the group consisting of primary or secondary amino groups and hydroxyl groups, and an aliphatic organic carbonate component C selected from the group consisting of dialkyl carbonates CD and of alkylene carbonates CA.

主权项

1. A process for the synthesis of an N-substituted cyclic alkylene urea comprising reacting in the presence of a basic catalyst, a multifunctional aliphatic amine A having
at least two amino groups, wherein at least one of the at least two amino groups is a primary amino group, —NH2, and at least one of the at least two amino groups is a secondary amino group, >NH, the other hydrogen group whereof having been substituted by a hydrocarbyl group, and an aliphatic organic carbonate component C selected from the group consisting of dialkyl carbonates CD, alkylene carbonates CA, and combinations thereof, wherein the ratio of the sum n(ps) of the amount of a substance n(-NH2) of the primary amino groups —NH2 in the multifunctional aliphatic amine A which are consumed by formation of a cyclic structure, and of the amount of a substance n(>NH) of those secondary amino groups >NH in the multifunctional aliphatic amine A which are consumed by formation of a cyclic structure, to the sum n(C) of the amount of substance n(CD) of carbonate groups of the dialkyl carbonate CD and the amount of substance n(CA) of carbonate groups in the alkylene carbonate CA, is more than 2.