申请人:Ciba-Geigy Corporation
公开号:US04093809A1
公开(公告)日:1978-06-06
Hydantoins of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl of 1 to 8 carbon atoms, R.sub.2 is ##STR2## R.sub.3 is alkyl of 1 to 8 carbon atoms, and X is a straight or branched chain alkylene of 1 to 4 carbon atoms or a straight or branched chain alkylene of 3 to 6 carbon atoms containing an internal carbamido group; or R.sub.1 and R.sub.2 together are Y where Y is a straight or branched chain alkylene of 4 to 8 carbon atoms having a pendant ##STR3## moiety are prepared by reacting first .alpha.,.beta.-unsaturated aldehydes or ketones with alkyl phosphites to form a phosphonate aldehyde or ketone followed by a classical Bucherer hydantoin synthesis. These compounds are intermediates for the preparation of polyglycidyl compounds useful in making flame-retardant epoxy resins. These hydantoins are also intermediates useful in preparing flame-retardant polyesters and polyurethanes.
公式为##STR1##的咪唑啉,其中R.sub.1是氢或1到8个碳原子的烷基,R.sub.2是##STR2##,R.sub.3是1到8个碳原子的烷基,X是1到4个碳原子的直链或支链烷基或含有内部碳酰胺基团的3到6个碳原子的直链或支链烷基;或者R.sub.1和R.sub.2一起是Y,其中Y是4到8个碳原子的直链或支链烷基,具有一个侧链##STR3##基团,通过首先将α,β-不饱和醛或酮与烷基磷酸酯反应形成磷酸酯醛或酮,然后进行经典的Bucherer咪唑啉合成制备。这些化合物是制备聚环氧化合物的中间体,可用于制备阻燃环氧树脂。这些咪唑啉也是制备阻燃聚酯和聚氨酯的中间体。