公开(公告)号：JPS61233674A

公开(公告)日：1986-10-17

申请号：JP7267785

申请日：1985-04-08

Applicant: MITSUI TOATSU CHEMICALS

Inventor： NAGATA TERUYUKI ,  KAJIMOTO NOBUYUKI ,  WADA MASARU ,  MIZUTA HIDEKI

IPC: C07D233/34

Abstract: PURPOSE:To obtain 1,3-dimethyl-2-imidazolidinone, an improved solvent for high polymer compounds, in high yield, by reacting N,N-dimethylethylenediamine with urea in the presence of a polar solvent at a reaction temperature of two stages. CONSTITUTION:In producing 1,3-dimethyl-2-imidazolidinone from N,N'- dimethylethylenediamine and urea(feed molar ratio of urea to N,N'- dimethylethylenediamine is preferably 0.6-1.2), firstly the reaction is carried out in a polar solvent such as N,N-dimethylformamide, N,N-dimethylacetamide, tetramethylurea, etc. at =180 deg.C, preferably 200-260 deg.C to give 1,3-dimethyl-2-imidazolidinone(DMI). Separation of the solvent is not required and the process is simple when DMI is especially used as the solvent.