申请人:Pentapharm, A.G.
公开号:US04440678A1
公开(公告)日:1984-04-03
Tripeptide derivatives having the formula ##STR1## wherein R.sup.1 is alkanoyl or .omega.-aminoalkyanoyl, phenylalkanoyl or p-aminophenylalkanoyl, cyclohexylcarbonyl or 4-aminomethyl-cylcohexylcarbonyl, benzoyl optionally substituted with methyl, amino, or halogen in the o- or p-position, alkoxy carbonyl, benzyloxy carbonyl optionally substituted with methoxy, methyl, or chlorine in the p-position, alkylsulfonyl, phenylsulfonyl or naphthylsulfonyl, R.sup.2 is straight-chained or branched alkyl, hydroxyalkyl, alkoxyalkyl, benzoxyalkyl, .omega.-carboxy-alkyl, .omega.-alkoxy carbonylalkyl, .omega.-benzyloxycarbonylalkyl, cyclohexyl, cyclohexylmethyl, 4-hydroxycyclohexylmethyl, phenyl, benzyl, 4-hydroxybenzyl or imidazol-4-yl-methyl, R.sup.3 is hydrogen or alkyl, R.sup.4 is hydrogen, methyl or ethyl, and R.sub.5 is an amino group substituted with aromatic or heterocyclic radicals, R.sup.5 being capable of being split off by enzymatic hydrolysis to form a colored or fluorescent product H-R.sup.5. The tripeptide derivatives of formula I are used for assaying certain enzymes, and in particular, factor Xa. Enzyme-bearing materials are reacted with the said tripeptide derivatives. The quantity of split product H-R.sub.5 released by the enzymatic action on the tripeptide derivative is determined photometrically, spectrophotometrically, fluorescence-spectrophotometrically, or electrochemically. The quantity of released split product H-R.sup.5 per time unit is proportional to the quantity of enzyme present in the starting material.
具有以下式子的三肽衍
生物##STR1##其中R.sup.1是脂肪酰或.omega.-
氨基烷基酰、苯基烷酰或p-
氨基苯基烷酰、环己基羰基或4-
氨甲基-环己基羰基、苯甲酰基,o-或p-位取代甲基、
氨基或卤素的苯甲酰基,烷氧羰基、苄氧羰基,p-位取代甲氧基、甲基或
氯的苄氧羰基,烷基磺酰基、苯基磺酰基或
萘基磺酰基,R.sup.2是直链或支链烷基、羟基烷基、烷氧基烷基、苯氧基烷基、.omega.-羧基-烷基、.omega.-烷氧羰基烷基、.omega.-苄氧羰基烷基、环己基、环己基甲基、
4-羟基环己基甲基、苯基、苄基、
4-羟基苄基或
咪唑-4-基-甲基,R.sup.3是氢或烷基,R.sup.4是氢、甲基或乙基,R.sub.5是被芳香族或杂环基团取代的
氨基,R.sup.5能被酶
水解分裂形成有色或荧光产物H-R.sup.5。式I的三肽衍
生物用于测定某些酶,尤其是Xa因子。酶载体材料与所述三肽衍
生物反应。通过酶对三肽衍
生物的作用释放的分裂产物H-R.sub.5的数量是通过光度测量、分光光度测量、荧光分光光度测量或电
化学方法确定的。每个时间单位释放的分裂产物H-R.sup.5的数量与起始材料中存在的酶的数量成比例。