Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A novel 5-C–N bond forming reaction is reported, which involves heating 1-substituted-pyrrolidin-2-ones with cyclic amines in the presence of a base. This reaction provides a convenient method for the synthesis of 1,5-disubstituted-pyrrolidin-2-ones. ... A novel C–N bond forming ...