申请人:Torii & Co., Ltd.
公开号:US04182897A1
公开(公告)日:1980-01-08
Amino- or guanidino-phenylpropionic ester derivatives represented by the formula: ##STR1## wherein R is --NH.sub.2 or ##STR2## R.sup.1 is hydrogen or a lower alkyl group, and R.sup.2 is an unsubstituted or a lower-alkyl-, carboxyalkyl-, lower-alkoxy-, lower-alkoxycarbonyl- or halogen-substituted phenyl group or an unsubstituted or a halogen-substituted naphthyl group, and acid addition salts thereof are novel compounds exhibiting a specific enzyme-inhibitory activity to proteolytic enzymes and, therefore, they are useful as the therapeutic agent of diseases induced by abnormal activation of these enzymes. The above-mentioned compounds can be produced by subjecting a nitrocinnamic acid derivative represented by the formula: ##STR3## and a phenol derivative or a naphthol derivative represented by the formula: HO--R.sup.2 to an esterification in the conventional manner to obtain a nitrocinnamic ester derivative, then reducing the latter compound to obtain an aminophenylpropionic ester derivative and, if desired, reacting it with cyanamide to obtain a guanidino-phenylpropionic ester derivative and, if desired, further converting the reaction product to an acid addition salt.
化合物的名称为氨基或胍基苯丙酸酯衍生物,化学式为:##STR1##
其中,R为—NH2或##STR2##
R1为氢或较低烷基,R2为未取代或取代为较低烷基、羧基烷基、较低烷氧基、较低烷氧羰基或卤素的苯基或未取代或取代为卤素的萘基,以及它们的酸加成盐是一种新型化合物,具有特定的酶抑制活性,对蛋白酶酶有抑制作用,因此它们可用于治疗由这些酶的异常活化引起的疾病。上述化合物可以通过将化学式为:##STR3##
的硝基肉桂酸衍生物和化学式为:HO—R2的苯酚衍生物或萘酚衍生物进行酯化反应以得到硝基肉桂酸酯衍生物,然后还原后得到氨基苯丙酸酯衍生物,如果需要,可以与氰胺反应得到胍基苯丙酸酯衍生物,如果需要,还可以进一步将反应产物转化为酸加成盐。