申请人:W. R. Grace & Co.
公开号:US04175198A1
公开(公告)日:1979-11-20
A 5-Secondary alkylidene hydantoin having the formula ##STR1## in which: (a) R is an alkyl group having 1-2 carbon atoms; and (b) X is hydrogen or a phenyl group can be prepared by condensing a hydantoin having the formula ##STR2## and a ketone having the formula ##STR3## in the presence of ammonia or an amine catalyst, the amine being a primary amine having a pK.sub.b between about 3 and about 5.
一种具有以下式子的5-次级烷基亚肟酸酐:##STR1## 其中:(a)R是具有1-2个碳原子的烷基基团;(b)X是氢或苯基团。可以通过在氨或胺催化剂的存在下缩合具有以下式子的亚肟酸酐:##STR2## 和具有以下式子的酮:##STR3## 制备,其中胺是具有pK.sub.b在约3到约5之间的一级胺。