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.
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。