申请人:Japan Tobacco, Inc.
公开号:US05204462A1
公开(公告)日:1993-04-20
4H-3,1-benzoxazin-4-one derivatives represented by formula (I) below: ##STR1## wherein R.sup.1 represents a lower alkyl group, R.sup.2 represents a lower alkyl group, a lower alkylthioalkyl group, or a lower alkanesulfinylalkyl group, R.sup.3 represents a hydrogen atom a hydroxyl group, a lower alkoxy group, or a lower acyloxy group, X represents an amino acid residue selected from the group consisting of alanine, valine, and phenylalanine, n represents an integer of 0, 1, or 2, and Y means a substituent selected from the group consisting of an alkanoyl group having 2 to 6 carbon atoms which may be substituted by a phenyl group, a benzyloxycarbonyl group, a lower alkoxycarbonyl group, a cinnamoyl group, and a methoxysuccinyl group. These derivatives exhibit a strong serine protease inhibiting effect, and are useful as effective components of agents for preventing and curing diseases caused by the excessive effect of serine proteases, e.g., pneumonia, pulmonary emphysema, fibroid lung, bronchitis, arthritis, pancreatitis, nephritis, shock, sepsis, and arteriosclerosis.
以下是公式(I)所代表的4H-3,1-苯并噁嗪-4-酮衍生物的中文翻译:其中R.sup.1代表较低的烷基,R.sup.2代表较低的烷基,较低的烷硫烷基,或较低的烷基磺酰基,R.sup.3代表氢原子,羟基,较低的烷氧基,或较低的酰氧基,X代表从丙氨酸,缬氨酸和苯丙氨酸组成的氨基酸残基,n代表0、1或2的整数,Y表示从具有2至6个碳原子的烷酰基中选择的取代基,该基可能被苯基取代,苄氧羰基,较低的烷氧羰基,肉桂酰基和甲氧基琥珀酰基。这些衍生物表现出强烈的丝氨酸蛋白酶抑制作用,并可用作预防和治疗由丝氨酸蛋白酶过度作用引起的疾病的有效成分,例如肺炎,肺气肿,纤维肺,支气管炎,关节炎,胰腺炎,肾炎,休克,败血症和动脉硬化。