申请人:The Du Pont Merck Pharmaceutical Company
公开号:US05508400A1
公开(公告)日:1996-04-16
This invention relates to the preparation of cyclic urea compounds. More specifically, this invention is directed to methods for selectively alkylating diamines, methods for selectively converting a mixture of alkylated and non-alkylated diamines to cyclic urea compounds, methods to purify cyclic urea compounds having a single N-substitution, methods to convert a cyclic urea compound having a single N-substitution to a cyclic urea compound having either symmetrical or non-symmetrical N,N'-disubstitution, and methods to remove protecting groups from cyclic urea compounds.
本发明涉及环状脲化合物的制备。更具体地说,本发明涉及选择性烷基化二胺的方法,选择性将烷基化和非烷基化二胺的混合物转化为环状脲化合物的方法,纯化具有单个N-取代的环状脲化合物的方法,将具有单个N-取代的环状脲化合物转化为具有对称或非对称N,N'-二取代的环状脲化合物的方法,以及从环状脲化合物中去除保护基的方法。