申请人:Air Products and Chemicals, Inc.
公开号:US06096891A1
公开(公告)日:2000-08-01
N,N'-dialkylurea and an .alpha.,.beta.-unsaturated nitrile are reacted to form a cyclic N,N'-dialkylurea containing an imine group on a ring carbon. This compound is useful as an intermediate in the formation of N,N'-dialkylpropyleneureas by hydrogenation followed by hydrogenolysis to remove the imine group. Using N,N'-dimethylurea and acrylonitrile as the starting materials one can arrive at N,N'-dimethylpropyleneurea which is a compound useful as an organic solvent and known by its acronym, DMPU.
N,N'-二烷基脲和α,β-不饱和腈反应形成含有环碳上亚胺基团的环状N,N'-二烷基脲。这种化合物在形成N,N'-二烷基丙烯脲的过程中作为中间体很有用,该过程包括氢化,然后通过氢解去除亚胺基团。使用N,N'-二甲基脲和丙烯腈作为起始物,可以制得N,N'-二甲基丙烯脲,这是一种有机溶剂,以其首字母缩写DMPU 而闻名。