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.
Amino-或guanidino-
苯丙酸酯衍
生物的
化学式表示为:其中R为--NH.sub.2或R.sup.1为氢或较低的烷基基团,R.sup.2为未取代或较低烷基,羧基烷基,较低烷氧基,较低烷氧羰基或卤素取代的苯基或未取代或卤素取代的
萘基,以及它们的酸盐是一种新颖的化合物,具有特定的对
蛋白酶酶抑制活性,因此它们可用作治疗由这些酶异常激活引起的疾病的治疗剂。上述化合物可通过将
化学式表示为的硝基
肉桂酸衍
生物和
酚衍
生物或
萘酚衍
生物进行酯化反应以获得硝基
肉桂酸酯衍
生物,然后还原后者化合物以获得
氨基
苯丙酸酯衍
生物,并且如果需要,与
氰胺反应以获得鸟
氨基
苯丙酸酯衍
生物,并且如果需要,进一步将反应产物转化为酸盐。