4H-3,1-benzoxazin-4-one derivative
US5204462A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Nov 27, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K38/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.