Process for the preparation of N,N' -carbonylbislactams

摘要

The invention relates to a process for the preparation of N,N'-carbonylbislactams by reaction of phosgene with at least one lactam which is characterized in that the tertiary amine is chosen from the group consisting of non-nucleophilic aliphatic tertiary amines. N,N'-Carbonylbislactams of high purity are thus obtained with good yields, both in the laboratory and on the industrial scale.